Oracle11g arch

SUN REFERENCE ARCHITECTURE
FOR ORACLE 11g GRID
White Paper
October, 2008

Sun Microsystems, Inc.

Table of Contents

Executive Summary ........................................................................................ 3

Scope ............................................................................................................ 4

IT Challenges and Grid Computing.................................................................... 5

Sun’s Reference Architecture for Oracle 11g Grid ............................................... 8
Reference Architecture Design ............................................................................. 8
Reference Architecture Components..................................................................... 9
Sun SPARC™ Enterprise Servers ......................................................................... 9
Sun StorageTek™ 6140 Fiber Channel Array ...................................................... 10
Solaris™ 10 Operating System ......................................................................... 10
Solaris Cluster Advanced Edition for Oracle RAC............................................... 10
Sun xVM™ Ops Center ................................................................................... 11
Oracle Real Application Clusters 11g ............................................................... 11
Oracle Enterprise Manager 10g Grid Control ................................................... 11
InfiniBand Technology ................................................................................... 12
10GbE Technology ........................................................................................ 12
Connecting the Network, Servers, Applications, and Storage .............................. 12
Application Logical Architecture ........................................................................ 15
System Components...................................................................................... 16

Performance Characterization........................................................................ 18
Workload ......................................................................................................... 18
Data Collection ................................................................................................ 18
Test Matrix ....................................................................................................... 18
Test Summary .................................................................................................. 19

Best Practices............................................................................................... 22
Storage ............................................................................................................ 22
Network ........................................................................................................... 22
Database Server ................................................................................................ 23
DB Configurations ............................................................................................. 25

Summary: The Sun Advantage ...................................................................... 26

References ................................................................................................... 27

3 Executive Summary Sun Microsystems, Inc.

Executive Summary

In the endless quest to do more with less, grid computing has emerged as one of the
most effective tools in the IT arsenal. And one of the newest and most effective uses
for grid computing is enterprise database implementations.

Enterprise grid and database software must be deployed on solid infrastructure—but
the endless choices can be daunting. Sun’s Reference Architecture for Oracle 11g Grid
helps ease this effort. Designed around proof-of-concept deployments and tested,
validated configurations, Sun’s Reference Architecture for Oracle 11g Grid provides
a high-performance, highly available and reliable database infrastructure in a cost-
effective grid environment. Deployed on the latest hardware and software from Sun
and incorporating software from Oracle, this reference architecture includes failover
mechanisms and redundancy to eliminate single points of failure. By using these
advanced products and technologies, customers can implement a robust, scalable
database platform that maintains or increases service levels.

Sun’s Reference Architecture for Oracle 11g Grid is built on the Solaris™ Operating
System (OS) and takes full advantage of its indisputable performance advantages for
database services, its world-record benchmark results, and optimizations that yield
even faster performance without requiring changes to existing applications. Running
on Sun’s new extremely fast Sun SPARC™ Enterprise servers and coupled with Solaris
Cluster™ software and Sun StorageTek™ QFS software, this reference architecture
provides an ideal platform for a powerful database grid solution.

A key strength of this reference architecture, and one of its greatest benefits, is its
ability to integrate complementary elements from both Sun and third-party vendors.
Vendor interoperability fosters a more adaptable enterprise and enables computing
resources and bandwidth to be re-provisioned to meet changing business demands.
By combining low-cost servers with other architecture components, Sun’s Reference
Architecture for Oracle 11g Grid balances cost, performance, and availability.

The outcome: a flexible, scalable, powerful solution that can help reduce costs
throughout the solution life cycle.

4 Scope Sun Microsystems, Inc.

Scope

This document is intended for executives evaluating the use of a horizontally
scalable grid for database application deployment, as well as project managers,
system engineers, integration specialists, and other technical staff looking to
design, implement, and tune database applications in a grid computing environ-
ment. It provides an overview of database deployment challenges and options,
and describes how Sun’s Reference Architecture for Oracle 11g Grid delivers on these
requirements. An architectural overview and descriptions of the hardware and
software components used in the reference architecture are also included. Note
that only the features and techniques directly relevant to the reference architecture
are discussed here. For more complete information about Sun servers and storage,
Oracle Real Application Clusters (RAC) 11g, InfiniBand switches, or other components
of this architecture, please refer to the product documentation from Sun, Oracle, and
InfiniBand switch vendor.

5 IT Challenges and Grid Computing Sun Microsystems, Inc.

Chapter 1
IT Challenges and Grid Computing

Pressure is mounting on IT executives to deploy reliable, high-performance database
solutions within severely constrained capital and expense budgets. Expectations are
high for horizontally scalable solutions that can maintain or increase application
availability, reliability, and performance while supporting service levels and simulta-
neously reducing total cost of ownership (TCO).

These requirements demand integrated solutions that are increasingly complex to
design, implement and maintain, and can require specialized technical and business
expertise. Rapid changes in business cycles and increasing demand for compute
power are prompting IT organizations to look for alternative solutions.

Today, grid computing is shifting from a mere concept to a viable computing frame-
work. IT organizations are now turning to the grid computing model for solutions
that can adapt to changing business needs, deliver greater efficiency, minimize
costs, and provide investment protection and rapid return on investment (ROI).
Organizations have high expectations for these new IT solutions, and the outcome
of implementations is critical. As a result, IT organizations should consider several
questions when evaluating a grid computing solution:
• Is low-cost grid architecture a viable option?
• What are the cost factors in scaling a grid horizontally?
• How do additional connections, software licensing fees, and implementation
and management of more complex systems impact solution costs?
• Is the grid solution capable of providing a reliable, horizontally scalable platform
for running enterprise-grade, commercial applications at acceptable service levels?
• What are the components of the grid architecture?
• How are applications distributed across servers?
• Where are the potential bottlenecks?
• In a database cluster, how does the system recover from a component failure?
• With respect to interconnect technology, how do Gigabit Ethernet, 10GbE and
InfiniBand compare in terms of latency, bandwidth, and overhead?
• How can Sun products add value to the grid solution?
• How do Sun products complement Oracle RAC deployments?

In an effort to help customers address these questions, and to assist in evaluating
a grid computing solution, Sun has invested tremendous resources in developing
the Reference Architecture for Oracle 11g Grid. Sun Reference Architectures are inte-
grated solutions consisting of specific combinations of hardware and software prod-
ucts that also incorporate third-party offerings from top tier software and networking
equipment vendors. These solutions include a set of recommended components that
are sized, tested, tuned, and documented to work together, delivering specific func-
tionality and reducing the complexity, costs, and risks of deploying new technology.

6 IT Challenges and Grid Computing Sun Microsystems, Inc.

Key Benefits
Sun’s Reference Architecture for Oracle 11g Grid provides a horizontally scalable
solution that delivers high performance and service levels at low cost. Using products
from Sun and Oracle, Sun’s Reference Architecture for Oracle 11g Grid also offers the
following benefits.
• Utilize a proven solution portfolio. Following the reference architecture assures
a valid blueprint for deploying Oracle RAC 11g in a grid computing environment
with the rigor of a Sun tested, certified, and supported configuration. The reference
architecture also formulates best practices for an Oracle RAC 11g infrastructure
with other best-of-breed third-party products within a grid context.

• Maximize availability. Sun’s Reference Architecture for Oracle 11g Grid maximizes
database availability by leveraging Oracle RAC 11g and Solaris Cluster software,
and by deploying redundant components to eliminate single points of failure. Using
a clustered grid infrastructure, Sun’s Reference Architecture for Oracle 11g Grid
employs built-in load balancing and failover mechanisms to minimize interruption
of service levels due to individual component failure. Oracle RAC 11g enables
databases to span across multiple physical servers, eliminating the server as
a single point of failure and ensuring high availability for applications and users.

• Maximize reliability. Implementing Solaris Cluster software enhances the reliability
and availability of Oracle RAC 11g and helps improve the overall resiliency of the
architecture. Solaris Cluster 3.2 Advanced Edition software offers the advantages
of a well-proven and solid cluster framework that is tightly integrated with the
Solaris 10 OS kernel for the quick detection and handling of failures. Combined
with an effective I/O fencing mechanism and full redundancy and load-balanc-
ing of interconnect traffic, the Solaris Cluster software helps ensure a secure and
dependable Oracle environment on the Solaris 10 OS.

• Maximize performance. Sun’s low-cost, high-performance Sun SPARC Enterprise
Servers with UltraSPARC™ T2 and T2 Plus processors deliver the core computing
power behind the reference architecture. These servers can be equipped up to
128 compute threads per server, which provide extreme versatility and set a new
standard for server availability, price/performance, and reduced ownership cost.

• Provide flexible scalability. System infrastructures must allow organizations to
increase system capacity and throughput by scaling up or scaling out — deploying
larger servers, adding a number of small servers, or both. The ability of Oracle RAC
11g to span the database over multiple physical servers provides the flexible scal-
ing so vital to the architecture design.

IT Challenges and Grid Computing Sun Microsystems, Inc.

• Minimize costs. IT organizations are always looking for opportunities to reduce
overall implementation costs, including costs of acquisition, deployment, and
maintenance. Sun’s Reference Architecture for Oracle 11g Grid addresses budget-
ary concerns by utilizing low-cost, robust commodity hardware and software.

• Simplify management. One of the challenges of grid computing is managing the
additional complexity of a grid infrastructure. Comprehensive management frame-
work solutions, including the Oracle Enterprise Manager 10g Grid Control and Sun
xVM Ops Center Manager software, are incorporated in the reference architecture.
These tools provide click-of-a-button, automated, self-management capabilities
that can be leveraged to manage grid complexity, simplify support, and drive
down operating costs.

8 Sun’s Reference Architecture for Oracle 11g Grid Sun Microsystems, Inc.

Chapter 2
Sun’s Reference Architecture for Oracle 11g Grid

Reference Architecture Design
Throughout the process of designing Sun’s Reference Architecture for Oracle 11g
Grid, certain requirements have been paramount. These requirements include reli-
ability, high availability, resiliency, cost-effectiveness, a high degree of scalability,
and use of best-of-breed products. By adhering to these fundamental criteria, and
investing extensive effort in development, integration, testing, and tuning the archi-
tecture, Sun technologists have produced a database grid ideally suited for enter-
prise applications. Figure 2-1 depicts the reference architecture implementation.

Figure 2-1. Sun’s Reference Architecture for Oracle 11g Grid implementation


Reference Architecture Components
Sun’s Reference Architecture for Oracle 11g Grid combines quality products from
top-tier vendors (Table 2-1). By utilizing fully redundant components, the reference
architecture delivers a highly robust, available, and reliable cluster grid infrastruc-
ture at a low acquisition cost.

Table 2-1. Hardware and software components in Sun’s Reference Architecture for Oracle 11g

Hardware Components Software Components
Sun SPARC Enterprise Servers with Ultra- Solaris 10, Update5 (5/08) Operating System
SPARC T2 UltraSPARC T2 Plus Processors
(Database Tier)
Sun Fire Server with UltraSPARC Processor Oracle 11g R1 Clusterware Database
(Application Management Tier)
Sun StorageTek 6140 Fibre Channel Array Solaris Cluster 3.2 U1 (2/08) Advanced
(Configured with Dual RAID Controllers) Edition for Oracle RAC software

StorageTek QFS 4.6.5
InfiniBand Server Switches Oracle Enterprise Manager 10g R4 Grid
Control
Storage Area Network (SAN) Switches Sun xVM 1.1 Ops Center
10-Gigabit Ethernet Switches
Gigabit Ethernet Switches

Terminal Console

Sun SPARC™ Enterprise Servers
Sun SPARC Enterprise Servers 1 with CoolThreads technology deliver higher perfor-
mance in less space and power than any competitive servers. They are based on
UltraSPARC T2 Ultra SPARC T2 Plus processors, the industry’s first massively thread-
ed Systems on a Chip (SoC), offering breakthrough performance and energy efficiency.

CoolThreads™ Technology
Third-generation CoolThreads technology, based on Sun’s Chip Multithreading or
CMT technology, supports up to 128 threads in as little as one rack unit (RU), provid-
ing increased computational density within constrained envelopes of power and
cooling. Very high levels of integration help reduce latency, lower costs, and improve
security and reliability. Balanced system design provides support for a wide range of
application types from Web services to high performance computing (HPC).

Sun SPARC™ Enterprise T5120 Server
The Sun SPARC Enterprise T5120 server, based on the UltraSPARC T2 processor,
is the world’s first 64-thread, general purpose server. For more information visit
http://www.sun.com/servers/coolthreads/t5120

__________
1 Note: Testing of the Sun Reference Architecture for Oracle 11g Grid focused on Sun servers equipped with UltraSPARC T2
UltraSPARC T2 Plus processors.


Sun SPARC™ Enterprise T5140 Server
The Sun SPARC Enterprise T5140 Server is the world’s first dual-socket, general-pur-
pose server powered by the third-generation UltraSPARC T2 Plus “System on a Chip”
processor. It comes with up to 128 compute threads per server. For more information
and technical specifications visit http://www.sun.com/servers/coolthreads/t5140.

Sun StorageTek™ 6140 Fiber Channel Array
The Sun StorageTek 6140 Fiber Channel array delivers high performance, high avail-
ability, and reliability all in one economical package. The array offers affordable
enterprise-class features and functionality, such as dual hot-swap power and cooling,
hot-swap redundant RAID controllers with mirrored cache, hot-swap disk drives,
global and local hot sparing, dynamic LUN expansion, dynamic capacity expansion,
non-disruptive firmware code loading, and remote status monitoring. It simplifies
management and configuration and “pay-as-you-grow” scalability protects your
investment. Utilizing the Sun StorageTek 6140 Fiber Channel Array in the reference
architecture offers reliability and impressive I/O performance in a small footprint.

Solaris™ 10 Operating System
Supported on over a thousand x86 and SPARC platforms, the Solaris 10 OS delivers
the performance, stability and security enterprise grid environments demand. With
more applications available than for any other open operating system, one OS can
span your entire enterprise: the Web tier, the data warehouse, and the most de-
manding technical compute applications.

The latest version of the Solaris OS offers new features including virtualization,
volume management support, and advanced real-time application debugging
(DTrace) to meet today’s enterprises demand. The Solaris OS is capable of vertical
and horizontal scaling and offers broad hardware platform, which are very important
capabilities for enterprise grid solutions.

Solaris Cluster Advanced Edition for Oracle RAC
Solaris Cluster Advanced Edition software for Oracle RAC provides enterprises with
additional high availability for Oracle RAC on the Solaris 10 OS. In addition to provid-
ing I/O fencing to help guarantee data integrity, this product suite leverages two
key components of Solaris Cluster software to deliver high performance. The Sun
StorageTek QFS shared file system software helps eliminate administrative overhead
and provides maximum data management and throughput for the most data-inten-
sive applications. The Solaris Volume Manager software provides partitioning and
automatic device relocation for data mirroring and high availability. Together, these
components result in a high-performance clustered file system for traditional file
system management and administration. Furthermore, the Solaris Cluster Advanced
Edition for Oracle RAC is tightly integrated with Oracle CRS and the Solaris OS to help
minimize application downtime and maximize application performance.


Solaris Cluster HA functionality supports active/active configurations. Solaris Cluster
uses a single logical private interconnect (clprivnet0), where two or more interfaces
are combined together for high throughput and stripe traffic across all the interfaces.

For further details on the benefits of deploying Solaris Cluster in Oracle RAC environ-
ments, see

http://www.sun.com/software/whitepapers/solaris10/solaris_cluster.pdf

Sun xVM™ Ops Center
This integrated management tool makes it possible to manage thousands of Win-
dows, Linux, and Solaris x64, x86 and SPARC systems. Administrators can discover,
provision, update, and monitor both virtual and physical systems—all from one
graphical interface.

Sun xVM Ops Center is also designed to enable remote management of heteroge-
neous environments. With its state-of-the-art, browser-based AJAX GUI, there is no
compromise between user experience and portability. Virtual machines and the
physical hardware they run on can be managed from anywhere through a standard
browser. xVM Ops Center software is specifically designed to work in existing data-
centers, even in companies that aren’t currently running Sun technology.

Oracle Real Application Clusters 11g
Oracle Real Application Clusters (RAC) 11g is the database designed for grid imple-
mentations. A proven technology that allows multiple, low-cost servers to perform
like a single large server, Oracle RAC forms a key foundation for enterprise database
grids. With Oracle RAC, even very high-end systems can be constructed from small,
very low-cost clusters made from standard, commodity parts. Running Oracle RAC
on a cluster provides the highest level of database availability along with flexibility
in scaling. If a node in the cluster fails, the Oracle software continues running on the
remaining nodes. If more processing power is necessary, new nodes can easily be
added to the cluster. As a result, organizations can deploy low cost solutions while
reaping the benefits of high availability and adaptability.

Oracle Enterprise Manager 10g Grid Control
Oracle Enterprise Manager 10g Grid Control software enables administrators to easily
manage business applications, end user services, and the entire grid infrastructure.
It contains improved tools such as new service modeling, broader support for service
protocols, and comprehensive policies and templates, enabling management of
grids as a single entity. Graphical service topologies and service dashboards provide
the right information to high level decision makers and line of business managers for
more effective planning, while automated provisioning and patching functionality
give IT administrators the power to make efficient, error-free changes.


InfiniBand Technology
InfiniBand is a high-performance, switched fabric interconnect that fosters greater
scalability and improved manageability. It can help accelerate database server speed
and provide an added boost to clustered databases.

Reliable Datagram Sockets (RDS) over InfiniBand can provide a horizontally scalable,
high-performance alternative to traditional vertical scaling for enterprises using
Oracle Database 11g and Real Application Clusters (RAC).

10GbE Technology
Sun’s 10 Gigabit Ethernet Networking Technology is one of the industry’s first network
interfaces specifically designed to accelerate multithreaded clustered application
performance by optimizing I/O throughput in environments that utilize parallel
threads. It enables systems to:
• Improve utilization of compute resources
• Minimize system I/O latency
• Leverage existing wiring infrastructure
• Take advantage of more network bandwidth

Sun SPARC Enterprise CMT-based servers come with network ports, which improves
the Oracle RAC cache fusion traffic over interconnect.

Connecting the Network, Servers, Applications, and Storage
Interconnect latency and throughput are essential elements in the scalability of
a database grid cluster. Inter-node communication and cache fusion traffic can
benefit from low latency, high throughput, and low system overhead.

Deploying InfiniBand further aids integration of the elements of Sun’s Reference
Architecture for Oracle 11g Grid since InfiniBand leverages the high performance
Reliable Datagram Sockets (RDS) protocol, a very low-latency remote direct memory
access (RDMA) based protocol driver. This RDS protocol can be used to create a
unified fabric for inter-process communication (IPC).

10GbE networking technology is designed to help accelerate clustered applications
that require high throughput and low latency for performance.

The Sun Reference Architecture for Oracle 11g Grid is validated with Infiniband and
10GbE interconnect technologies. Tests have shown the benefit of using high band-
width and law latency interconnect over traditional GbE technology. For more details
please refer to Chapter 3.


Figure 2-2 illustrates the two key network connection areas: the private interconnect
and public network. Using high-throughput (InfiniBand or 10GbE) technologies for
the private interconnects between the database servers accelerates cache fusion
traffic and Oracle RAC inter-node communication, and results in very low latency.
The public network connection enables traffic between the application and database
servers.

Figure 2-2. The private interconnect and the public network

The management network is reserved for telnet access, basic health and monitoring
of components, connection to the Service Processor module, and monitoring and
communication by the Oracle Enterprise Manager 10g Grid Control and xVM Ops
Center Manager software (Figure 2-3). The terminal console is connected to the
built-in management port of the servers to enable console access.


Figure 2-3. The management network

All four database nodes share a pair of Sun StorEdge 6140 FC arrays via two SAN
switches (Figure 2-4). This configuration, together with multiplexed I/O (MPxIO),
helps provide full redundancy in the event of failures.

Figure 2-4. The database servers share the two storage arrays through the SAN switches.


Application Logical Architecture
Figure 2-5 represents the logical structure of Sun’s Reference Architecture for Oracle
11g Grid. The management software stack meets the critical need for a grid manage-
ment framework by leveraging software from the Oracle Enterprise Manager 10g
Grid Control, the Sun xVM Ops Center, and the SunPlex Manager / Solaris Cluster
Manager software. In addition, other key components form the foundation of the
logical architecture, including the Solaris 10 OS, Solaris Cluster Advanced Edition for
Oracle RAC software, and Oracle RAC 11g. Oracle Clusterware provides the database
cluster framework, and is enhanced by the use of the Solaris Cluster software, a
robust and proven cluster framework that is tightly integrated with Solaris OS kernel.
Oracle datafile storage options can be raw devices through Oracle Automatic Storage
Management (ASM), the Solaris Cluster file system with Sun StorageTek QFS shared
file system software, or both.

Figure 2-5. The logical structure of Sun’s Reference Architecture for Oracle 11g Grid


System Components
Table 2-2 details the reference architecture hardware and software components
deployed, tested, and tuned in the Authorized SunSM Solution Center by Sun staff.
Hardware and software specifications are for models and releases available at the
time the reference architecture was developed.

Note, however, that any Sun Fire server can be used for the application and Sun SPARC
Enterprise servers for database. For updates on available products, please refer to indi-
vidual vendors’ web sites.

Sun and Oracle technologists at the Sun Competency Center for Oracle in Menlo
Park, California designed, integrated, tested, and tuned the reference architecture
for arbitrary workloads generated with the iGenOLTP. Developed at Sun, iGenOLTP
is a benchmark suite that mimics an online customer order entry application.

The reference architecture was validated and tested with different interconnect
technologies available, such as Gigabit Ethernet, InfiniBand, and 10GbE. The Oracle
cluster interconnect is one of the important factors for overall system performance.
See the performance characterization section.


Table 2-2. Specific reference architecture components

Servers Database Servers 4 x Sun SPARC Enterprise Servers 5120
(1 x UltraSPARC T2 processor, 32 GB RAM,
2 x 146 GB Drives)
4 x Sun SPARC Enterprise Servers 5140
(2 x UltraSPARC T2 Plus processor, 32 GB RAM,
2 x 146 GB Drives)
Management Servers 1 x Sun Fire
(8 x UltraSPARC processor, 8 GB RAM ,
2 x 146 GB disks)
Application Servers 6 x Sun Fire
(8 x UltraSPARC processor, 8 GB RAM ,
2 x 146 GB disks)
Storage Arrays 2 x Sun StorageTek 6140 Fiber Channel Array
Interconnect Switches 2 x GbE switch – 12 port
2 x InfiniBand switch – 12 port
2 x 10GbE switch – 12 port
Public Switches 2 x 24 port GbE switch

Storage Management Switch 24 port GbE switch
SAN Switches 2 x 16-port Sun SAN switch

Network Adapter Cards (For Database 4 x dual-port GbE cards
Servers) 4 x dual-port Fiber-Channel cards
4 x dual-port InfiniBand cards
Terminal Console 16-port terminal console
OS Solaris 10 OS
Cluster Software Oracle ClusterWare
Solaris Cluster Advanced Edition for Oracle
RAC (SC3.2U1)
DB Software Oracle 11g Database
Management Software Oracle Enterprise Manager 10g R4 Grid
Control
xVM Ops Center 1.1

Software Volume Manager Software Oracle Automatic Storage Management
Solaris Volume Manager and Sun StorageTek
QFS Shared File System 4.6
Workloads iGenOLTP
Oracle 11g Client
Miscellaneous Oracle 10g Grid Control Agent

18 Performance Characterization Sun Microsystems, Inc.

Chapter 3
Performance Characterization

This chapter addresses the method adopted to test the Reference Architecture for
stability and performance, and explains some of the benchmarking results from the
testing. Sun performed a variety of tests, including functional tests to validate the
Reference Architecture, and performance tests to show Oracle RAC scalability with
Sun products horizontally. More detail is provided in the test matrix section below.

Workload
The iGEN-OLTP workload benchmark was used in the reference architecture illus-
trated in Chapter 2. An internally-developed benchmark toolkit, iGENOLTP is based
on real customer workloads. It simulates a Global Order System that includes four
continent-based schema all accessed via central views. The transactions contained
various SQL statements: read-only selects, update and insert operations.

Data Collection
In the testing effort Sun gathered all the OS and Oracle performance statistics and
used them as input to the tuning effort. In this way, we believe we have achieved
the maximum workload for the reference architecture. The iGEN tool collects the
statistics such as number of transactions, TPS response time, etc.

Test Matrix
The Sun Reference Architecture for Oracle 11g Grid was validated and tested on
various cluster interconnect technologies such as Gigabit Ethernet, InfiniBand with
RDS, and 10Gigabit Ethernet. The reference architecture solution was also validated
and tested on various storage options for RAC. Tests were performed to compare the
storage option available for Oracle Cluster, including Oracle ASM and Sun Shared QFS
file system.

The tests were performed to stress the servers at different workload (CPU utilization)
levels by increasing the number of connections to the database. The purpose of the
testing was to show how servers perform at different workloads, such as 50% CPU
utilization, 5% CPU utilization and 100% CPU utilization.

The testing was conducted on four-node RAC clusters. We scaled the RAC one node
at a time, from one node up to four nodes, to show how the server scales horizontally
(scales out) in a Grid RAC architecture.

The tests were performed on the CMT family of servers (Sun SPARC Enterprise servers
5120 and Sun SPARC Enterprise 5220 servers).


Test Summary
• Interconnect Tests: Cluster interconnect is most important factor for RAC perfor-
mance and scalability. Interconnects with high bandwidth, low interconnect
latency and low CPU usage are always preferred solutions for RAC Grid Architec-
ture. We tested the Sun Reference Architecture over different interconnects.
Some results are shown in Figures 3-1 and 3-2.

Figure 3-1 AWR Global Cache Stats: GbE-InfiniBand-10GbE

Figure 3-2 Response time

The interconnect tests showed that:
• 10GbE InfiniBand with RDS improves overall response time 2.
• Cache latency at cluster interconnect is ½ with 10GbE interconnect compared
with GbE interconnect.

__________
2 The response time also depends on other components such as I/O and CPU.


• Cache latency at cluster interconnect is 1/3 with InfiniBand RDS compared
with GbE interconnect.
• Server CPU utilization is 10 to 20 % lower with 10GbE InfiniBand compared
with GbE Interconnect.

ASM vs Shared QFS Tests
RAC Grid implementation requires shared storage. Oracle ASM and Sun Shared QFS
were the options considered best for the Sun Reference Architecture implementation.

The following charts (Figure 3-3 and Figure 3-4) show the performance difference for
Oracle ASM and Sun Shared QFS.

Figure 3-3 Throughput

Figure 3-4 Server resources


The testing effort yielded the following results:
• Performance results for Shared QFS Performance and ASM are comparable.
• Shared QFS extends the storage option for RAC with ease of management.
OS Utility can be used to monitor or manage the filesystem.
• Throughput response time are nearly the same for both ASM QFS.
• There is not much system overhead using Shared QFS compared to ASM.

RAC Scaling
Sun scaled the RAC one node at a time, from one node up to four nodes. At a high
level, Figure 3-5 shows server scaling results achieved. The baseline was created on
one node by looking at the overall CPU utilization, and the user count was increased
to archive higher CPU utilization (while scaling from one node to two nodes Sun
doubled the user count, and so on). The scalability factor was calculated based
on TPS achieved.
Scalability Factor = TPS Achieved / TPS baseline (single node).

Figure 3-5 Sun Reference Architecture for Oracle 11g Grid scaling.

The tests demonstrated that the Sun servers showed linear scaling in the RAC/grid
architecture.

22 Best Practices Sun Microsystems, Inc.

Chapter 4
Best Practices

This chapter provides some of the best practices followed while designing various
aspects of the Sun Reference Architecture for Oracle 11g Grid.

Storage

QFS Storage

The Shared QFS file system layout and file creation options are the keys to high
database performance.

QFS has two file allocation schemes available: an ms file system type, and an ma
file system type.

For the reference architecture Sun used the ma file system type, where QFS is
installed on multiple partitions where metadata is written to mm devices,
and data can be written to md devices. Both devices should be sharing the same
spindle. For more details see http://docs.sun.com/source/819-935-10/index.html.

While creating the file system with sammkfs command specify 1 MB DAU size
which reduces the I/O and increases the application performance.

Enabling the SAMAIO for RAC datafiles provides a performance boost by decreasing
CPU utilization. You can use setfa with the -q option to enable it.

Network

Virtual local area network

Virtual local area networks (VLANs) are logical groupings of network devices. Using
VLANs to segment different types of traffic to specific subnets provides better
throughput, manageability, application separation and security. This is optional,
but for large and complex networking situations it helps to separate VLANs for
applications, storage and RAC traffic.

Driver patch

It is always recommended to have latest updated drivers on all the network
devices on the system. Please check sunsolve.sun.com for more details. Refer
to SPARC Enterprise Servers Product Notes.

For the reference architecture Sun used 10GbE Cards with XAUI interfaces for
the cluster interconnect. The following patches are recommended:

1255-01,125891-01,12546-02,1212-11,138048-01.


Network ndd tuning

Network tuning is one of the important factors affecting the overall system
performance. Learn more at:
http://www.solarisinternals.com/wiki/index.php/Networks.

The following are specific tuning recommendations related to the reference
architecture.

ndd -set /dev/tcp tcp_smallest_anon_port 2048

ndd -set /dev/tcp tcp_conn_req_max_q 81920

ndd -set /dev/tcp tcp_conn_req_max_q0 81920

ndd -set /dev/tcp tcp_xmit_hiwat 800000

ndd -set /dev/udp udp_max_buf 4194304

ndd -set /dev/udp udp_xmit_hiwat 262144

ndd -set /dev/udp udp_recv_hiwat 262144

Database Server

Solaris Update Firmware

The reference architecture is built on Solaris 10 Update 5. Before deploying
the grid, verify the version shipped with the server and determine if it is the latest
production version supported. Always check for the latest update or patches at the
Sun website.

Make sure you have the latest firmware on the system. For the CMT servers
Sun installed the latest firmware available: .1.4.a.

Memory

The reference architecture testing was done with servers using 32GB of total RAM
memory. Please refer to the database server documentation to determine the total
memory required for your implementation. Sun recommends that you configure
your servers with the maximum memory feasible to meet your scalability and
performance needs.

Intimate Shared Memory (ISM) is a Solaris facility that enables large pages (4 MB)
and locking pages in memory. So the only thing needed from a database point of
view is to define the maximum memory that Oracle application should use. This is
defined by Oracle parameter memory_max_target.


QFS Mount options

Shared QFS is one of the important components of the reference architecture.
Tuning the shared QFS file system mount options improves the overall database
performance. QFS Mount options are specified in /etc/opt/SUNWsamfs/samfs.cmd file.

Table 4-1 describes some important mount options.

Table 4-1: Mount Options

Option Value Description

Stripe 1 This sets the stripe width for the file system to n disk
allocation units (DAUs). Set the 1 for DAUs = 128 kilobytes.
For our testing the DAU size was set to 1M.

mh_write Enables simultaneous reads and writes to the same file for
multiple hosts.
Qwrite Enables simultaneous reads and writes to the same file
from different threads.
Forcedirectio Specifies direct I/O as the default I/O mode (meaning the
data is transferred directly between user’s buffer and disk).
Rdlease 600 The read release time option specifies the maximum num-
ber of seconds that the file can be read before reacquiring
the read release. Default is 30.
Wrlease 600 The write release time option specifies the maximum num-
ber of seconds that the file can be written before reacquir-
ing the write release. Default is 30.
Aplease 600 The append release time option specifies the maximum
number of seconds that the file can be appended before
reacquiring the append release. Default is 30.


DB Configurations

LMS Binding

Set the LMS processes to the optimum level using ADDM to maximize this value.
For the workload Sun used, we found 8 LMS processes were optimal to drive the
work and improve the cache fusion traffic. Sun used gc_server_processes to set the
parameter. During the testing Sun found creating the process set and binding the
LMS process to the process set improved the interconnect traffic. Use psrset -c to
create the process set and psrset -b to bind the LMS process ids to the process set.
Binded the process set at 12:25. Figure 4-1 illustrates the results.

Figure 4-1: Average Active Sessions

26 Summary: The Sun Advantage Sun Microsystems, Inc.

Summary: The Sun Advantage
IT managers are turning to grid computing to help deliver the capabilities needed
while meeting budget constraints. However, coordinating hardware, software, and
networking equipment is a daunting task. In order to minimize the uncertainty of
implementing a grid computing solution, Sun has taken on the effort of evaluat-
ing best-of-breed hardware and software and creating an optimized grid computing
solution for Oracle databases. The result of this effort is Sun’s Reference Architecture
for Oracle 11g Grid, a portfolio of Sun and third-party products designed to reduce
the risks, uncertainty, and costs associated with implementing an Oracle database
within a grid computing environment.

Designed, tested, implemented, and tuned at the Sun Competency Center for Oracle
in Menlo Park, California, the reference architecture consists of recommended,
integrated hardware and software stacks for a proven grid database solution. Along
with this architecture, Sun provides a best practices framework for obtaining optimal
performance, availability, and resiliency.

The most compelling benefits of Sun’s Reference Architecture for Oracle 11g Grid
come not from the individual components, but from the ability to integrate comple-
mentary elements—whether they come from Sun or another vendor. The combina-
tion of SPARC Enterprise servers with InfiniBand technology or 10GbE technology
ensures higher database throughput, while the adoption of Solaris Cluster Advanced
Edition for RAC enhances the reliability and availability of Oracle RAC 11g. The result
is a solution that can help deliver the highest service levels and satisfy the most
demanding business requirements of a database grid.

For more information on applying this technology solution to an Oracle database
environment, contact a local Sun sales representative.

2 References Sun Microsystems, Inc.

References
More information about Sun and Oracle technologies can be found in the references
below.

Web Sites of Interest
Description Web Site URL
Hardware Sun servers http://sun.com/servers
Sun CoolThread Servers http://sun.com/servers/CoolThreads

Cluster Solaris Cluster http://sun.com/software/solaris/cluster
Solaris Cluster and Oracle 11g http://sun.com/software/solaris/cluster/
gallery/index.xml
Software Solaris Cluster Open Storage http://www.sun.com/software/cluster/osp
Program
Solaris OS http://sun.com/solaris
Oracle Database 11g http://oracle.com/technology/products/
database/oracle11g
Oracle Real Application Clusters http://oracle.com/technology/products/
database/clusterware
Storage xVM Ops-Center http://sun.com/software/products/
xvmopscenter
Sun Storage http://sun.com/storage
Sun StorageTek 6140 Fiber http://sun.com/storagetek/disk_systems/
Channel Array midrange/6140
Solaris Cluster Open Storage http://www.sun.com/software/cluster/osp
Program
Joint Sun and Oracle Joint Grid Initiative http://sun.com/third-party/global/oracle/grid
Initiatives

Sun Reference Architecture for Oracle 11g Grid Sun Microsystems, Inc.

Sun Microsystems, Inc. 4150 Network Circle, Santa Clara, CA 95054 USA Phone 1-650-960-1300 or 1-800-555-9SUN (986) Web sun.com
© 2008 Sun Microsystems, Inc. All rights reserved. Sun, Sun Microsystems, the Sun logo, CoolThreads, StorageTek, Solaris, Sun Fire, and xVM are trademarks or registered trademarks of Sun Microsystems, Inc. in the
United States and other countries. Products bearing SPARC trademarks are based upon an architecture developed by Sun Microsystems, Inc. PNWP14530-0 Printed in USA 10/08

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