Standard Edition High Availability (SEHA) - The Why, What & HowMarkus Michalewicz
Standard Edition High Availability (SEHA) is the latest addition to Oracle’s high availability solutions. This presentation explains the motivation for Standard Edition High Availability, how it is implemented and the way it works currently as well as what is planned for future improvements. It was first presented during Oracle Groundbreakers Yatra (OGYatra) Online in July 2020.
Understanding oracle rac internals part 1 - slidesMohamed Farouk
This document discusses Oracle RAC internals and architecture. It provides an overview of the Oracle RAC architecture including software deployment, processes, and resources. It also covers topics like VIPs, networks, listeners, and SCAN in Oracle RAC. Key aspects summarized include the typical Oracle RAC software stack, local and cluster resources, how VIPs and networks are configured, and the role and dependencies of listeners.
This version of "Oracle Real Application Clusters (RAC) 19c & Later – Best Practices" was first presented in Oracle Open World (OOW) London 2020 and includes content from the OOW 2019 version of the deck. The deck has been updated with the latest information regarding ORAchk as well as upgrade tips & tricks.
What to Expect From Oracle database 19cMaria Colgan
The Oracle Database has recently switched to an annual release model. Oracle Database 19c is only the second release in this new model. So what can you expect from the latest version of the Oracle Database? This presentation explains how Oracle Database 19c is really 12.2.0.3 the terminal release of the 12.2 family and the new features you can find in this release.
Oracle Database performance tuning using oratopSandesh Rao
Oratop is a text-based user interface tool for monitoring basic database operations in real-time. This presentation will go into depth on how to use the tool and some example scenarios. It can be used for both RAC and single-instance databases and in combination with top to get a more holistic view of system performance and identify any bottlenecks.
This document summarizes a presentation on Oracle RAC (Real Application Clusters) internals with a focus on Cache Fusion. The presentation covers:
1. An overview of Cache Fusion and how it allows data to be shared across instances to enable scalability.
2. Dynamic re-mastering which adjusts where data is mastered based on access patterns to reduce messaging.
3. Techniques for handling contention including partitioning, connection pools, and separating redo logs.
4. Benefits of combining Oracle Multitenant and RAC such as aligning PDBs to instances.
5. How Oracle In-Memory Column Store fully integrates with RAC including fault tolerance features.
Oracle Database Availability & Scalability Across Versions & EditionsMarkus Michalewicz
The Oracle Database provides a comprehensive set of availability and scalability features. The availability of those features, however, differs between versions and database editions (e.g. Standard and Enterprise Edition). This presentation reviews and discusses some of these capabilities across different versions and editions, on-premises and in the Oracle Cloud, including the recent change in support for Oracle Real Application Clusters (RAC) in the Oracle Standard Edition (SE)2.
Oracle RAC 19c: Best Practices and Secret InternalsAnil Nair
Oracle Real Application Clusters 19c provides best practices and new features for upgrading to Oracle 19c. It discusses upgrading Oracle RAC to Linux 7 with minimal downtime using node draining and relocation techniques. Oracle 19c allows for upgrading the Grid Infrastructure management repository and patching faster using a new Oracle home. The presentation also covers new resource modeling for PDBs in Oracle 19c and improved Clusterware diagnostics.
Starting with 12c Release 1, Oracle introduced a completely new architecture concept for its database - the Container Database.
With this new architecture, new challenges came up but with the same breath a wide branch of new opportunities.
The presentation will address the capabilities to create fast and easy new (test) databases or clones for a running production database. Five different ways will be discussed.
- Using Local and Remote Cloning
- Using an Unplugged PDB (predefined master)
- Using Refreshable PDBs as a master for new (test) databases
- Snapshot Carousel
Another point of the agenda is the usage of the Snapshot features of ACFS and Direct NFS to speed up the creation process.
Oracle Real Application Clusters 19c- Best Practices and Internals- EMEA Tour...Sandesh Rao
In this session, I will cover under-the-hood features that power Oracle Real Application Clusters (Oracle RAC) 19c specifically around Cache Fusion and Service management. Improvements in Oracle RAC helps in integration with features such as Multitenant and Data Guard. In fact, these features benefit immensely when used with Oracle RAC. Finally we will talk about changes to the broader Oracle RAC Family of Products stack and the algorithmic changes that helps quickly detect sick/dead nodes/instances and the reconfiguration improvements to ensure that the Oracle RAC Databases continue to function without any disruption
Oracle Enterprise Manager (EM) provides complete lifecycle management for the cloud - from automated cloud setup to self-service delivery to cloud operations. In this session you’ll learn how to take control of your cloud infrastructure with EM features including Consolidation Planning and Self-Service provisioning with Metering and Chargeback. Come hear how Oracle is expanding its management capabilities into the cloud!
(As presented by Adeesh Fulay at Oracle Technology Network Architect Day in Chicago, October 24, 2011.)
This document provides an overview of Oracle 12c Pluggable Databases (PDBs). Key points include:
- PDBs allow multiple databases to be consolidated within a single container database (CDB), providing benefits like faster provisioning and upgrades by doing them once per CDB.
- Each PDB acts as an independent database with its own data dictionary but shares resources like redo logs at the CDB level. PDBs can be unplugged from one CDB and plugged into another.
- Hands-on labs demonstrate how to create, open, clone, and migrate PDBs between CDBs. The document also compares characteristics of CDBs and PDBs and shows how a non-C
This document provides an overview and summary of Oracle Data Guard. It discusses the key benefits of Data Guard including disaster recovery, data protection, and high availability. It describes the different types of Data Guard configurations including physical and logical standbys. The document outlines the basic architecture and processes involved in implementing Data Guard including redo transport, apply services, and role transitions. It also summarizes some of the features and protection modes available in different Oracle database versions.
Oracle RAC is an option to the Oracle Database Enterprise Edition. At least, this is what it is known for. This presentation shows the many ways in which the stack, which is known as Oracle RAC can be used in the most efficient way for various use cases.
DOAG Oracle Unified Audit in Multitenant EnvironmentsStefan Oehrli
Oracle Audit is a well-known and proven database functionality. Or maybe not? What does auditing look like in combination with Oracle Multitenant Databases? Does database and Unified Audit work analogous to existing configurations? In the context of this presentation the auditing in the environment of container databases will be examined more closely. It will be shown what has to be considered and how an auditing concept has to be adapted to the new architecture. With focus on the current versions of the Oracle database, specific problems and workarounds in the area of Unified Audit will be shown. The presentation will be complemented by corresponding examples and live demos.
Exploring Oracle Database Performance Tuning Best Practices for DBAs and Deve...Aaron Shilo
The document provides an overview of Oracle database performance tuning best practices for DBAs and developers. It discusses the connection between SQL tuning and instance tuning, and how tuning both the database and SQL statements is important. It also covers the connection between the database and operating system, how features like data integrity and zero downtime updates are important. The presentation agenda includes topics like identifying bottlenecks, benchmarking, optimization techniques, the cost-based optimizer, indexes, and more.
The document describes how to convert a single instance Oracle database to Oracle Real Application Clusters (RAC) using RMAN. The key steps include:
1. Duplicating the single instance database to an auxiliary instance on the RAC nodes using RMAN DUPLICATE.
2. Configuring the RAC-specific initialization parameters and creating the necessary redo logs and undo tablespaces.
3. Starting instances on each RAC node and registering them with the Cluster Ready Services framework.
This document provides a summary of a presentation on Oracle Real Application Clusters (RAC) integration with Exadata, Oracle Data Guard, and In-Memory Database. It discusses how Oracle RAC performance has been optimized on Exadata platforms through features like fast node death detection, cache fusion optimizations, ASM optimizations, and integration with Exadata infrastructure. The presentation agenda indicates it will cover these RAC optimizations as well as integration with Oracle Data Guard and the In-Memory database option.
The document discusses Oracle Real Application Clusters (Oracle RAC) and how it provides high availability and scalability for Oracle Database workloads. Oracle RAC uses a shared-nothing architecture with multiple independent database instances managing a shared database, and it leverages a cluster interconnect for communication between the nodes. Key features of Oracle RAC discussed include dynamic resource management for improved performance, hang detection and resolution capabilities, and service-oriented buffer cache access to optimize data access based on service location.
This document discusses Oracle Multitenant 19c and pluggable databases. It begins with an introduction to the speaker and overview of pluggable databases. It then describes the traditional Oracle database architecture and the multitenant architecture in Oracle 19c. It discusses the different components of a container database including the root, seed PDB, and application containers. It also covers how to create pluggable databases from scratch, through cloning locally and remotely, relocating PDBs, and plugging in unplugged PDBs.
The document summarizes new features in Oracle Recovery Manager (RMAN) for Oracle 19c and 18c database releases. Key highlights include the ability to grant and revoke RMAN catalog privileges on specific pluggable databases, support for connecting to recovery catalogs when connected to a pluggable database target, and the new DUPLICATE PLUGGABLE DATABASE command for duplicating pluggable databases to existing container databases. The document also discusses duplicating databases to Oracle Cloud and using RMAN backups after migrating databases between platforms.
This document discusses troubleshooting Oracle Real Application Clusters (RAC). It begins with an overview of RAC architecture including Grid Infrastructure, CRS, ASM, and networking requirements. The document then covers various troubleshooting scenarios for issues like cluster startup failures and node evictions. It also discusses proactive and reactive monitoring tools available in Oracle RAC and recent performance improvements.
Introduction to Oracle Data Guard BrokerZohar Elkayam
This is an old deck I recently renewed for a customer session. This is the introduction to Oracle Data Guard broker feature, how to deploy it, how to use it and what are its benefits.
This presentation is based on version 11g but most of it is also compatible to Oracle 12c,
Agenda:
- Oracle Data Guard overview
- Dataguard broker introduction
- Configuring and using the data guard
- Live Demos
Oracle Real Application Clusters (RAC) 12c Rel. 2 - Operational Best PracticesMarkus Michalewicz
This document outlines an agenda for a presentation on Oracle Real Application Clusters (RAC) 12c Release 2 operational best practices. The agenda includes discussing fundamentals, architecture choices, applying best practices, and using smart features. It provides information on shared storage, networking and interconnect requirements. It also describes the Cluster Domain architecture and how best practices apply across architectures. Tools for obtaining and applying best practices like CVU, ORAchk and the Autonomous Health Framework are also covered.
Tuning SQL for Oracle Exadata: The Good, The Bad, and The Ugly Tuning SQL fo...Enkitec
This document discusses tuning SQL on Oracle Exadata. It makes three main points:
1. Gathering and displaying execution plan data differs slightly on Exadata compared to non-Exadata databases.
2. The general approach to optimization is similar to non-Exadata, focusing on features like smart scans, storage indexes, and parallelism that provide the most benefit.
3. Rewriting SQL queries can have a dramatic impact on performance by enabling offloading and reducing disk I/O, with examples showing savings of over 98% in run time.
1) The document discusses Oracle database auditing features before and after version 12.1. It describes migrating the audit trail to the unified audit trail and using the SYS.UNIFIED_AUDIT_TRAIL table.
2) It provides steps to configure syslog auditing on Linux for Oracle database audit records. Procedures are created to output messages to syslog and call it from a fine-grained auditing policy handler.
3) An example fine-grained auditing policy is created to audit access to the SECDEMO.CUSTOMER table and call the syslog handler for non-application users.
The document discusses Oracle's Engineered Systems for SMB (ODA) and highlights eight common reasons why customers choose ODA. It describes ODA's ability to consolidate Oracle databases and software onto optimized platforms to improve performance, simplify management, provide license transparency, ensure business continuity, enable hybrid cloud strategies, and serve as a stepping stone to the public cloud. ODA systems include clustered, single server, and high availability configurations to suit different customer needs.
Starting with 12c Release 1, Oracle introduced a completely new architecture concept for its database - the Container Database.
With this new architecture, new challenges came up but with the same breath a wide branch of new opportunities.
The presentation will address the capabilities to create fast and easy new (test) databases or clones for a running production database. Five different ways will be discussed.
- Using Local and Remote Cloning
- Using an Unplugged PDB (predefined master)
- Using Refreshable PDBs as a master for new (test) databases
- Snapshot Carousel
Another point of the agenda is the usage of the Snapshot features of ACFS and Direct NFS to speed up the creation process.
Oracle Real Application Clusters 19c- Best Practices and Internals- EMEA Tour...Sandesh Rao
In this session, I will cover under-the-hood features that power Oracle Real Application Clusters (Oracle RAC) 19c specifically around Cache Fusion and Service management. Improvements in Oracle RAC helps in integration with features such as Multitenant and Data Guard. In fact, these features benefit immensely when used with Oracle RAC. Finally we will talk about changes to the broader Oracle RAC Family of Products stack and the algorithmic changes that helps quickly detect sick/dead nodes/instances and the reconfiguration improvements to ensure that the Oracle RAC Databases continue to function without any disruption
Oracle Enterprise Manager (EM) provides complete lifecycle management for the cloud - from automated cloud setup to self-service delivery to cloud operations. In this session you’ll learn how to take control of your cloud infrastructure with EM features including Consolidation Planning and Self-Service provisioning with Metering and Chargeback. Come hear how Oracle is expanding its management capabilities into the cloud!
(As presented by Adeesh Fulay at Oracle Technology Network Architect Day in Chicago, October 24, 2011.)
This document provides an overview of Oracle 12c Pluggable Databases (PDBs). Key points include:
- PDBs allow multiple databases to be consolidated within a single container database (CDB), providing benefits like faster provisioning and upgrades by doing them once per CDB.
- Each PDB acts as an independent database with its own data dictionary but shares resources like redo logs at the CDB level. PDBs can be unplugged from one CDB and plugged into another.
- Hands-on labs demonstrate how to create, open, clone, and migrate PDBs between CDBs. The document also compares characteristics of CDBs and PDBs and shows how a non-C
This document provides an overview and summary of Oracle Data Guard. It discusses the key benefits of Data Guard including disaster recovery, data protection, and high availability. It describes the different types of Data Guard configurations including physical and logical standbys. The document outlines the basic architecture and processes involved in implementing Data Guard including redo transport, apply services, and role transitions. It also summarizes some of the features and protection modes available in different Oracle database versions.
Oracle RAC is an option to the Oracle Database Enterprise Edition. At least, this is what it is known for. This presentation shows the many ways in which the stack, which is known as Oracle RAC can be used in the most efficient way for various use cases.
DOAG Oracle Unified Audit in Multitenant EnvironmentsStefan Oehrli
Oracle Audit is a well-known and proven database functionality. Or maybe not? What does auditing look like in combination with Oracle Multitenant Databases? Does database and Unified Audit work analogous to existing configurations? In the context of this presentation the auditing in the environment of container databases will be examined more closely. It will be shown what has to be considered and how an auditing concept has to be adapted to the new architecture. With focus on the current versions of the Oracle database, specific problems and workarounds in the area of Unified Audit will be shown. The presentation will be complemented by corresponding examples and live demos.
Exploring Oracle Database Performance Tuning Best Practices for DBAs and Deve...Aaron Shilo
The document provides an overview of Oracle database performance tuning best practices for DBAs and developers. It discusses the connection between SQL tuning and instance tuning, and how tuning both the database and SQL statements is important. It also covers the connection between the database and operating system, how features like data integrity and zero downtime updates are important. The presentation agenda includes topics like identifying bottlenecks, benchmarking, optimization techniques, the cost-based optimizer, indexes, and more.
The document describes how to convert a single instance Oracle database to Oracle Real Application Clusters (RAC) using RMAN. The key steps include:
1. Duplicating the single instance database to an auxiliary instance on the RAC nodes using RMAN DUPLICATE.
2. Configuring the RAC-specific initialization parameters and creating the necessary redo logs and undo tablespaces.
3. Starting instances on each RAC node and registering them with the Cluster Ready Services framework.
This document provides a summary of a presentation on Oracle Real Application Clusters (RAC) integration with Exadata, Oracle Data Guard, and In-Memory Database. It discusses how Oracle RAC performance has been optimized on Exadata platforms through features like fast node death detection, cache fusion optimizations, ASM optimizations, and integration with Exadata infrastructure. The presentation agenda indicates it will cover these RAC optimizations as well as integration with Oracle Data Guard and the In-Memory database option.
The document discusses Oracle Real Application Clusters (Oracle RAC) and how it provides high availability and scalability for Oracle Database workloads. Oracle RAC uses a shared-nothing architecture with multiple independent database instances managing a shared database, and it leverages a cluster interconnect for communication between the nodes. Key features of Oracle RAC discussed include dynamic resource management for improved performance, hang detection and resolution capabilities, and service-oriented buffer cache access to optimize data access based on service location.
This document discusses Oracle Multitenant 19c and pluggable databases. It begins with an introduction to the speaker and overview of pluggable databases. It then describes the traditional Oracle database architecture and the multitenant architecture in Oracle 19c. It discusses the different components of a container database including the root, seed PDB, and application containers. It also covers how to create pluggable databases from scratch, through cloning locally and remotely, relocating PDBs, and plugging in unplugged PDBs.
The document summarizes new features in Oracle Recovery Manager (RMAN) for Oracle 19c and 18c database releases. Key highlights include the ability to grant and revoke RMAN catalog privileges on specific pluggable databases, support for connecting to recovery catalogs when connected to a pluggable database target, and the new DUPLICATE PLUGGABLE DATABASE command for duplicating pluggable databases to existing container databases. The document also discusses duplicating databases to Oracle Cloud and using RMAN backups after migrating databases between platforms.
This document discusses troubleshooting Oracle Real Application Clusters (RAC). It begins with an overview of RAC architecture including Grid Infrastructure, CRS, ASM, and networking requirements. The document then covers various troubleshooting scenarios for issues like cluster startup failures and node evictions. It also discusses proactive and reactive monitoring tools available in Oracle RAC and recent performance improvements.
Introduction to Oracle Data Guard BrokerZohar Elkayam
This is an old deck I recently renewed for a customer session. This is the introduction to Oracle Data Guard broker feature, how to deploy it, how to use it and what are its benefits.
This presentation is based on version 11g but most of it is also compatible to Oracle 12c,
Agenda:
- Oracle Data Guard overview
- Dataguard broker introduction
- Configuring and using the data guard
- Live Demos
Oracle Real Application Clusters (RAC) 12c Rel. 2 - Operational Best PracticesMarkus Michalewicz
This document outlines an agenda for a presentation on Oracle Real Application Clusters (RAC) 12c Release 2 operational best practices. The agenda includes discussing fundamentals, architecture choices, applying best practices, and using smart features. It provides information on shared storage, networking and interconnect requirements. It also describes the Cluster Domain architecture and how best practices apply across architectures. Tools for obtaining and applying best practices like CVU, ORAchk and the Autonomous Health Framework are also covered.
Tuning SQL for Oracle Exadata: The Good, The Bad, and The Ugly Tuning SQL fo...Enkitec
This document discusses tuning SQL on Oracle Exadata. It makes three main points:
1. Gathering and displaying execution plan data differs slightly on Exadata compared to non-Exadata databases.
2. The general approach to optimization is similar to non-Exadata, focusing on features like smart scans, storage indexes, and parallelism that provide the most benefit.
3. Rewriting SQL queries can have a dramatic impact on performance by enabling offloading and reducing disk I/O, with examples showing savings of over 98% in run time.
1) The document discusses Oracle database auditing features before and after version 12.1. It describes migrating the audit trail to the unified audit trail and using the SYS.UNIFIED_AUDIT_TRAIL table.
2) It provides steps to configure syslog auditing on Linux for Oracle database audit records. Procedures are created to output messages to syslog and call it from a fine-grained auditing policy handler.
3) An example fine-grained auditing policy is created to audit access to the SECDEMO.CUSTOMER table and call the syslog handler for non-application users.
The document discusses Oracle's Engineered Systems for SMB (ODA) and highlights eight common reasons why customers choose ODA. It describes ODA's ability to consolidate Oracle databases and software onto optimized platforms to improve performance, simplify management, provide license transparency, ensure business continuity, enable hybrid cloud strategies, and serve as a stepping stone to the public cloud. ODA systems include clustered, single server, and high availability configurations to suit different customer needs.
Presented the "A Cloud Journey - Move to the Oracle Cloud" on behalf of Ricardo Gonzalez during Bulgarian Oracle User Group Spring Conference 2019. This presentation discusses various methods on how to migrate to the Oracle Cloud and provides recommendations as to which tool to use (and where to find it) especially assuming that Zero Downtime Migration is desired, for which the new Zero Downtime Migration tool is described and discussed in detail. More information: http://www.oracle.com/goto/move
Confoo 202 - MySQL Group Replication and ReplicaSetDave Stokes
MySQL Group Replication, ReplicaSet, & Architectures outlines MySQL's general product direction for high availability and replication. It provides an overview of Group Replication, ReplicaSet, and related components like MySQL Shell and MySQL Router. Key capabilities discussed include automated setup and management, integrated load balancing, and both asynchronous and synchronous replication options. Limitations noted include the requirement for manual failover in ReplicaSet deployments.
Oracle MAA Best Practices - Applications ConsiderationsMarkus Michalewicz
Providing the highest levels of availability is the main goal of Oracle's Maximum Availability Architecture (MAA), which has been available for more than two decades. This presentation looks at Oracle MAA from a slightly different angle, as MAA should really be considered by the DBA as well as by developers and even by non-Oracle customers.
This presentation addresses and tries to provide a reasonable answer to the rather common question: "Why should we still use an Oracle Database?", which more often than not is raised by management, but in the presence of more and more "alternative solutions", also by non-Oracle database administrators who are looking to solve a particular problem.
This is the first presentation of my "Oracle Fundamentals" presentation series.
Note that slide 35 (of 38) is outdated and should not have been included. Unfortunately, SlideShare does not allow for re-uploads anymore and hence, I will leave it in for now.
Maximum Availability Architecture - Best Practices for Oracle Database 19cGlen Hawkins
Provides the latest updates on high availability (HA) best practices in this well-established technical deep-dive session. Learn how to optimize all aspects of Oracle Active Data Guard 19c. See how to use session draining, transparent application continuity, Oracle RAC, and Oracle GoldenGate to mask outages and planned maintenance from users and to accelerate time to repair for single database or your fleet of databases. Hear about the latest HA best practices with Oracle Multitenant and understand how the new sharded architecture can achieve even higher levels of HA and fault isolation for OLTP applications. Find out how everything you know about Oracle Maximum Availability Architecture (MAA) on-premises can be deployed in the cloud.
Oracle RAC 19c - the Basis for the Autonomous DatabaseMarkus Michalewicz
Oracle Real Application Clusters (RAC) has been Oracle's premier database availability and scalability solution for more than two decades as it provides near linear horizontal scalability without the need to change the application code. This session explains why Oracle RAC 19c is the basis for Oracle's Autonomous Database by introducing some of its latest features, some of which were specifically designed for ATP-D, as well as by taking a peek under the hood of the dedicated Autonomous Database Service (ATP-D).
This document discusses clustered Oracle deployments on SPARC servers. It describes how Oracle's Sun SPARC Enterprise servers can be used as cluster nodes to increase availability, consolidate resources, and improve utilization. It also discusses Oracle Real Application Clusters for database clustering, Solaris Cluster for application and web tier clustering, and how virtualization allows for multi-tier clustering on SPARC servers. The document provides examples of clustered configurations and their benefits.
HA, Scalability, DR & MAA in Oracle Database 21c - OverviewMarkus Michalewicz
Oracle Database 21c is Oracle's first Innovation Release and includes a lot of new and innovative HA, Scalability, DR & MAA features to provide the most scalable and reliable Oracle Database available today. This presentation discusses some of the database as well as infrastructure features contributing to this unprecedented level of resiliency.
Customer overview oracle solaris cluster, enterprise editionsolarisyougood
This document provides an overview of Oracle Solaris Cluster, highlighting its key benefits and differentiators. It discusses how Oracle Solaris Cluster can help businesses minimize downtime and recover faster from failures, while also lowering costs through server consolidation. Example customer implementations and reference architectures are also presented, showing how Oracle Solaris Cluster provides high availability and disaster recovery for mission-critical Oracle applications and databases in both physical and virtual environments.
This presentation discusses the top 5 reasons as well as various technology updates to provide a reasonable answer to the rather common question: "Why should one use an Oracle Database?". This "2020 "C-Edition" was first presented during the IOUG / Quest Forum Digital Event: Database & tech Week in June 2020 and subsequently updated based on feedback received.
This document summarizes a presentation on tuning Oracle GoldenGate for optimal performance in real-world environments. It discusses architectural changes in GoldenGate 12c including a microservices architecture and parallel replication. It also outlines several areas and tools for tuning performance at the host, database, and GoldenGate configuration levels including the use of AWR, STATS commands, and health check scripts.
Need to dive into #MySQL suddenly and find out, briefly, what can be done with MySQL technology? NoSQL, MySQL 8.0, Highly Available, InnoDB Cluster & MySQL Cluster both Community & Enterprise Edition. It's all here.
With the Oracle Multitenant option of Oracle Database 12c, the services of individual pluggable databases (PDBs) can be opened selectively on specified nodes of an Oracle Real Application Clusters (Oracle RAC) cluster. A true symbiotic relationship: the Oracle Multitenant option makes Oracle RAC better, and Oracle RAC makes the Oracle Multitenant option better! UPDATE for IOUG 2014.
This document provides an overview of Oracle Cloud Infrastructure (OCI) products and services including Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). It discusses various OCI services such as compute, storage, database, integration, and NoSQL database. It also provides release notes for May 2020 which describe new regions and services available in OCI. Finally, it shares examples of companies using and migrating to OCI to benefit from its performance, security, and cost effectiveness.
Make Your Application “Oracle RAC Ready” & Test For ItMarkus Michalewicz
This presentation talks about the secrets behind Oracle RAC’s horizontal scaling algorithm, Cache Fusion, and how you can ensure that your application is “Oracle RAC ready.”. It discusses do's and don'ts and how to test your application for "Oracle RAC readiness". This version was first presented in Sangam19.
Achieving Continuous Availability for Your Applications with Oracle MAAMarkus Michalewicz
This document summarizes a presentation on achieving continuous availability for applications with Oracle Maximum Availability Architecture (MAA). The presentation covers:
1. An overview of Transparent Application Continuity (TAC) and how it can be used for planned maintenance and unplanned outages.
2. The high availability requirements needed to ensure business continuity, such as using database services, connection strings, and Active Data Guard.
3. A customer example of how JPMorgan Chase uses Oracle Application Continuity in their Gaia Oracle Service to improve application resilience across the firm.
"It can always get worse!" – Lessons Learned in over 20 years working with Or...Markus Michalewicz
First presented during the DOAG 2022 Conference and Exhibition, this presentation discusses and reviews the most significant lessons learned in over 20 years of working with Oracle Maximum Availability Architecture. It explains why documentation is good, but automated checks are better, and why standardization can help increase the availability of nearly all systems, including database systems.
Oracle RAC Virtualized - In VMs, in Containers, On-premises, and in the CloudMarkus Michalewicz
This presentation discusses the support guidelines for using Oracle Real Application Clusters (RAC) in virtualized environments, for which general Oracle Database support guidelines are discussed shortly first.
First presented during DOAG 2021 User Conference, this presentation replaces its predecessor from 2016: https://www.slideshare.net/MarkusMichalewicz/how-to-use-oracle-rac-in-a-cloud-a-support-question
The Top 5 Reasons to Deploy Your Applications on Oracle RACMarkus Michalewicz
This document discusses the top 5 reasons to deploy applications on Oracle Real Application Clusters (RAC). It discusses how RAC provides:
1. Developer productivity through transparency that allows developers to focus on application code without worrying about high availability or scalability.
2. Integrated scalability for both applications and database features through techniques like parallel execution and cache fusion that allow linear scaling.
3. Seamless high availability for the entire application stack through capabilities like fast reconfiguration times and zero data loss that prevent application outages.
4. Isolated consolidation for converged use cases through features like pluggable database isolation that allow secure sharing of hardware resources.
5. Full flexibility to choose deployment options
Oracle Cloud is Best for Oracle Database - High AvailabilityMarkus Michalewicz
This presentation looks behind the covers and evaluates the offerings provided by various cloud vendors and compares them to the Oracle Database offerings available in the Oracle Cloud. The comparison includes Oracle Database in general, focusing on High Availability (HA) and Disaster Recovery (DR), as those areas have historically distinguished the Oracle Database from other databases and will likely continue to be some of the most distinguishing features when it comes to operating the Oracle Database in the cloud.
The Oracle database has met the highest high availability expectations for decades. The goal of this presentation is to show which technologies Oracle is already using today so that this high standard is not disappointed in the years to come.
Sharing some observations, facts & possible conclusions to find out “What’s Next?” in the area of high availability, scalability and the overall development of Oracle and other databases.
"Changing Role of the DBA" Skills to Have, to Obtain & to Nurture - Updated 2...Markus Michalewicz
The ever-changing IT industry requires DBA's to keep their skills up-to-date. This presentation discusses skills that any DBA should have, but also those that any DBA should obtain and nurture regardless of which new technology is entering the (Gartner) hype cycle. The first ever version of this deck was presented during Sangam18 under the title "(Oracle) DBA Skills to Have, to Obtain and to Nurture" and used in other occasions during 2019. It was subsequently enhanced to a more generic 2019 version, which included an outlook for 2020! This edition of the presentation maintains the generic character, but has been updated to reflect unprecedented changes in 2020 and to cover the latest Oracle technology, to provide a 3-year comparison as well as trends analysis.
Note that the link on slide 25 in the subtitle should have been: https://go.oracle.com/DBA
"Maximum Availability Architecture (MAA) for Oracle Database, Exadata and the Cloud" was first presented during Oracle Open World (OOW) 2019. This version of the deck has been updated for OOW London 2020 including the latest information regarding patching and upgrading the Oracle Database with Zero Downtime.
The ever-changing IT industry requires DBA's to keep their skills up-to-date. This presentation discusses skills that any DBA should have, but also those that any DBA should obtain and nurture regardless of which new technology is entering the (Gartner) hype cycle. The first ever version of this deck was presented during Sangam18 under the title "(Oracle) DBA Skills to Have, to Obtain and to Nurture " and used in other occasions during 2019. This is the more generic 2019 edition of the presentation which includes an outlook for 2020!
This presentation is based on Lawrence To's Maximum Availability Architecture (MAA) Oracle Open World Presentation talking about the latest updates on high availability (HA) best practices across multiple architectures, features and products in Oracle Database 19c. It considers all workloads, OLTP, DWH and analytics, mixed workload as well as on-premises and cloud-based deployments.
Best Practices for the Most Impactful Oracle Database 18c and 19c FeaturesMarkus Michalewicz
Oracle OpenWorld 2019 featured a presentation on best practices for high availability (HA) features in Oracle Database versions 12c, 18c, and 19c. The presentation covered key HA capabilities like Oracle Multitenant and Pluggable Databases, Data Guard, Hang Manager, and Real Application Clusters. It provided an overview of how each feature enables common lifecycle operations and maintenance tasks to be performed with minimal downtime.
AskTom: How to Make and Test Your Application "Oracle RAC Ready"?Markus Michalewicz
Oracle Real Application Clusters (Oracle RAC) is the preferred availability and scalability solution for Oracle Databases, as most applications can benefit from its capabilities without making any changes. This mini session explains the secrets behind Oracle RAC’s horizontal scaling algorithm, Cache Fusion, and how you can test and ensure that your application is “Oracle RAC ready.”
This deck was first presented in OOW19 as an AskTom theater / mini session and will be presented as a full version in other conferences going forward at which time I will provide an updated version of the deck.
From HA to Maximum Availability - A Holistic Historical DiscussionMarkus Michalewicz
Keynote - first presented in course of the DOAG HA Day in Hamburg in September 2018. This deck discusses the Maximum Availability Architecture approach against the background of "Four More Often Than Not Disregarded HA Fundamentals" and also shares HA thoughts that eventually will lead to “Continuous Availability” rather than (just) “High Availability”.
The ever-changing IT industry requires DBA's to keep their skills up-to-date. This presentation discusses skills that any DBA should have, but also those that any DBA should obtain and nurture regardless of which new technology is entering the hype cycle. This presentation was first presented during Sangam18.
Oracle MAA (Maximum Availability Architecture) 18c - An OverviewMarkus Michalewicz
The document discusses Oracle Maximum Availability Architecture (MAA). It provides an overview of MAA and how it has evolved from on-premises to cloud environments. MAA includes best practices blueprints and reference architectures to help customers achieve optimal high availability at lowest cost and complexity using Oracle technologies.
The Oracle Database with Sharding is a globally distributed multi-model (relational & document) DBMS. It is built on shared-nothing architecture in which data is horizontally partitioned across databases that share no hardware or software. It provides linear scalability, fault isolation and geographic data distribution for shard-amenable applications. This presentation was presented during Sangam18 in December 2018 - original title: "Oracle Sharding 18c for Data Sovereignty and Massive Linear Scalability"
Under the Hood of the Smartest Availability Features in Oracle's Autonomous D...Markus Michalewicz
This presentation discusses details of the smartest High Availability (HA) features in Oracle's Autonomous Databases. It also explains how those features are integrated in the various stages of the journey to the Autonomous Database. This presentation was first presented during Collaborate18 / #C18LV together with Maria Colgan (@SQLmaria). This is the updated DOAG18 version which was first presented in November 2018.
Oracle Real Application Clusters (RAC) Roadmap for New Features describes and discusses best practices for new features introduced with Oracle RAC 12c as well as Oracle RAC 18c and provides a short outlook of the road ahead.
Oracle Maximum Availability Architecture (MAA) Best Practices for the Cloud discusses MAA best practices for the Oracle Cloud mainly, explaining how MAA helps to improve availability in cloud environments as well as the Autonomous Database and explains, how to ensure application continuity using the Oracle Database in the cloud.
Explaining GitHub Actions Failures with Large Language Models Challenges, In...ssuserb14185
GitHub Actions (GA) has become the de facto tool that developers use to automate software workflows, seamlessly building, testing, and deploying code. Yet when GA fails, it disrupts development, causing delays and driving up costs. Diagnosing failures becomes especially challenging because error logs are often long, complex and unstructured. Given these difficulties, this study explores the potential of large language models (LLMs) to generate correct, clear, concise, and actionable contextual descriptions (or summaries) for GA failures, focusing on developers’ perceptions of their feasibility and usefulness. Our results show that over 80% of developers rated LLM explanations positively in terms of correctness for simpler/small logs. Overall, our findings suggest that LLMs can feasibly assist developers in understanding common GA errors, thus, potentially reducing manual analysis. However, we also found that improved reasoning abilities are needed to support more complex CI/CD scenarios. For instance, less experienced developers tend to be more positive on the described context, while seasoned developers prefer concise summaries. Overall, our work offers key insights for researchers enhancing LLM reasoning, particularly in adapting explanations to user expertise.
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Proactive Vulnerability Detection in Source Code Using Graph Neural Networks:...Ranjan Baisak
As software complexity grows, traditional static analysis tools struggle to detect vulnerabilities with both precision and context—often triggering high false positive rates and developer fatigue. This article explores how Graph Neural Networks (GNNs), when applied to source code representations like Abstract Syntax Trees (ASTs), Control Flow Graphs (CFGs), and Data Flow Graphs (DFGs), can revolutionize vulnerability detection. We break down how GNNs model code semantics more effectively than flat token sequences, and how techniques like attention mechanisms, hybrid graph construction, and feedback loops significantly reduce false positives. With insights from real-world datasets and recent research, this guide shows how to build more reliable, proactive, and interpretable vulnerability detection systems using GNNs.
Discover why Wi-Fi 7 is set to transform wireless networking and how Router Architects is leading the way with next-gen router designs built for speed, reliability, and innovation.
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What Do Contribution Guidelines Say About Software Testing? (MSR 2025)Andre Hora
Software testing plays a crucial role in the contribution process of open-source projects. For example, contributions introducing new features are expected to include tests, and contributions with tests are more likely to be accepted. Although most real-world projects require contributors to write tests, the specific testing practices communicated to contributors remain unclear. In this paper, we present an empirical study to understand better how software testing is approached in contribution guidelines. We analyze the guidelines of 200 Python and JavaScript open-source software projects. We find that 78% of the projects include some form of test documentation for contributors. Test documentation is located in multiple sources, including CONTRIBUTING files (58%), external documentation (24%), and README files (8%). Furthermore, test documentation commonly explains how to run tests (83.5%), but less often provides guidance on how to write tests (37%). It frequently covers unit tests (71%), but rarely addresses integration (20.5%) and end-to-end tests (15.5%). Other key testing aspects are also less frequently discussed: test coverage (25.5%) and mocking (9.5%). We conclude by discussing implications and future research.
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Mastering Fluent Bit: Ultimate Guide to Integrating Telemetry Pipelines with ...Eric D. Schabell
It's time you stopped letting your telemetry data pressure your budgets and get in the way of solving issues with agility! No more I say! Take back control of your telemetry data as we guide you through the open source project Fluent Bit. Learn how to manage your telemetry data from source to destination using the pipeline phases covering collection, parsing, aggregation, transformation, and forwarding from any source to any destination. Buckle up for a fun ride as you learn by exploring how telemetry pipelines work, how to set up your first pipeline, and exploring several common use cases that Fluent Bit helps solve. All this backed by a self-paced, hands-on workshop that attendees can pursue at home after this session (https://o11y-workshops.gitlab.io/workshop-fluentbit).
Landscape of Requirements Engineering for/by AI through Literature ReviewHironori Washizaki
Hironori Washizaki, "Landscape of Requirements Engineering for/by AI through Literature Review," RAISE 2025: Workshop on Requirements engineering for AI-powered SoftwarE, 2025.
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How Valletta helped healthcare SaaS to transform QA and compliance to grow wi...Egor Kaleynik
This case study explores how we partnered with a mid-sized U.S. healthcare SaaS provider to help them scale from a successful pilot phase to supporting over 10,000 users—while meeting strict HIPAA compliance requirements.
Faced with slow, manual testing cycles, frequent regression bugs, and looming audit risks, their growth was at risk. Their existing QA processes couldn’t keep up with the complexity of real-time biometric data handling, and earlier automation attempts had failed due to unreliable tools and fragmented workflows.
We stepped in to deliver a full QA and DevOps transformation. Our team replaced their fragile legacy tests with Testim’s self-healing automation, integrated Postman and OWASP ZAP into Jenkins pipelines for continuous API and security validation, and leveraged AWS Device Farm for real-device, region-specific compliance testing. Custom deployment scripts gave them control over rollouts without relying on heavy CI/CD infrastructure.
The result? Test cycle times were reduced from 3 days to just 8 hours, regression bugs dropped by 40%, and they passed their first HIPAA audit without issue—unlocking faster contract signings and enabling them to expand confidently. More than just a technical upgrade, this project embedded compliance into every phase of development, proving that SaaS providers in regulated industries can scale fast and stay secure.
Why Orangescrum Is a Game Changer for Construction Companies in 2025Orangescrum
Orangescrum revolutionizes construction project management in 2025 with real-time collaboration, resource planning, task tracking, and workflow automation, boosting efficiency, transparency, and on-time project delivery.
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Adobe After Effects is a software application used for creating motion graphics, special effects, and video compositing. It's widely used in TV and film post-production, as well as for creating visuals for online content, presentations, and more. While it can be used to create basic animations and designs, its primary strength lies in adding visual effects and motion to videos and graphics after they have been edited.
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After Effects is primarily used in the post-production phase, meaning it's used to enhance the visuals after the initial editing of footage has been completed.
TestMigrationsInPy: A Dataset of Test Migrations from Unittest to Pytest (MSR...Andre Hora
Unittest and pytest are the most popular testing frameworks in Python. Overall, pytest provides some advantages, including simpler assertion, reuse of fixtures, and interoperability. Due to such benefits, multiple projects in the Python ecosystem have migrated from unittest to pytest. To facilitate the migration, pytest can also run unittest tests, thus, the migration can happen gradually over time. However, the migration can be timeconsuming and take a long time to conclude. In this context, projects would benefit from automated solutions to support the migration process. In this paper, we propose TestMigrationsInPy, a dataset of test migrations from unittest to pytest. TestMigrationsInPy contains 923 real-world migrations performed by developers. Future research proposing novel solutions to migrate frameworks in Python can rely on TestMigrationsInPy as a ground truth. Moreover, as TestMigrationsInPy includes information about the migration type (e.g., changes in assertions or fixtures), our dataset enables novel solutions to be verified effectively, for instance, from simpler assertion migrations to more complex fixture migrations. TestMigrationsInPy is publicly available at: https://github.com/altinoalvesjunior/TestMigrationsInPy.
How to Batch Export Lotus Notes NSF Emails to Outlook PST Easily?steaveroggers
Migrating from Lotus Notes to Outlook can be a complex and time-consuming task, especially when dealing with large volumes of NSF emails. This presentation provides a complete guide on how to batch export Lotus Notes NSF emails to Outlook PST format quickly and securely. It highlights the challenges of manual methods, the benefits of using an automated tool, and introduces eSoftTools NSF to PST Converter Software — a reliable solution designed to handle bulk email migrations efficiently. Learn about the software’s key features, step-by-step export process, system requirements, and how it ensures 100% data accuracy and folder structure preservation during migration. Make your email transition smoother, safer, and faster with the right approach.
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Societal challenges of AI: biases, multilinguism and sustainabilityJordi Cabot
Towards a fairer, inclusive and sustainable AI that works for everybody.
Reviewing the state of the art on these challenges and what we're doing at LIST to test current LLMs and help you select the one that works best for you