OpenStack Swift overview oscon2011

Aug 1, 201114 likes3,371 views

John Dickinson gave a presentation on Swift, an open source scalable object storage system. He discussed Swift's architectural design including the proxy server, ring, storage servers, and consistency servers. He also covered Swift's history, best practices for deployment in small and large clusters, and future work including improving the ring and making deployment more modular. The presentation provided an overview of Swift's capabilities and limitations.

Swift Overview

John Dickinson
Swift Project Technical Lead

Wednesday, July 27, 11

What We’ll Cover

‣ Intro to Swift
‣ Architectural Overview
‣ Best Practices for Deploying
‣ Future work

Wednesday, July 27, 11

Swift is Scalable Storage

‣ Scales as the cluster grows
‣ Designed to run on commodity hardware
‣ No single point of failure

Wednesday, July 27, 11

Swift is not

‣ RAID
‣ Distributed Filesystem
‣ CDN
‣ SAN/NAS/DAS

Wednesday, July 27, 11

Swift Use Cases

‣ Multi-tenant
‣ Backups
‣ Typically large
‣ Write-once, read-never
‣ Web Content
‣ Typically small
‣ Write-many, read-very-many

Wednesday, July 27, 11

Swift Use Cases (cont.)

‣ Document management
‣ Medical imaging
‣ Disaster recovery
‣ Caching
‣ Storage appliances
‣ Scientiﬁc data

Wednesday, July 27, 11

Example Usage

‣ Standard HTTP verbs
‣ Standard HTTP response codes

Wednesday, July 27, 11

Designing Swift

‣ At scale, everything breaks
‣ Design for failure
‣ The “Happy Path” is trivial
‣ At scale, even rare events happen a lot
‣ “Simple is better than complex.”

Wednesday, July 27, 11

Swift History

‣ Rackspace Cloud Files (circa 2008)
‣ Distributed Storage
‣ Centralized Metadata

Wednesday, July 27, 11

Swift History (cont.)

‣ Rackspace Cloud Files (circa 2010)
‣ Redesigned from the ground up
‣ Distributed storage and metadata
‣ Worked closely with ops

Wednesday, July 27, 11

Modular Design of Swift

‣ Proxy Server
‣ The Ring
‣ Storage Servers
‣ Consistency Servers

Wednesday, July 27, 11

Proxy Server

‣ Public face of swift
‣ Determines appropriate storage nodes
‣ https://swift.example.com/v1/account/container/object
‣ Coordinates responses

Wednesday, July 27, 11

The Ring

‣ Maps requests to storage nodes
‣ Availability zones
‣ Expandable without affecting most entities

Wednesday, July 27, 11

The Ring, in detail

‣ Started as a consistent-hashing ring
‣ Availability zones
‣ Became a static map of partitions to volumes
‣ What is a partition?
‣ What is a volume?

Wednesday, July 27, 11

Storage Servers

‣ Account server
‣ Container server
‣ Object server

Wednesday, July 27, 11

Storage Servers (Account and Container)

‣ SQLite databases
‣ Groups containers and objects into accounts
‣ Simple schema
‣ Table for listings
‣ Table for metadata
‣ Scale concerns?

Wednesday, July 27, 11

Storage Servers (Object)

‣ Use the ﬁle system to store ﬁles
‣ Any ﬁle system that supports xattrs
‣ Files named by timestamp
‣ Tombstones
‣ Directory structure
‣ /mount/data_dir/partition/hash_sufﬁx/hash/object.ts
‣ Directory metadata can easily exhaust RAM

Wednesday, July 27, 11

Consistency Servers

‣ Replicators
‣ Updaters
‣ Auditors

Wednesday, July 27, 11

How to Deploy

‣ Swift All-In-One (SAIO)
‣ Small cluster
‣ Large cluster

Wednesday, July 27, 11

How to Deploy (SAIO)

‣ All services in one VM
‣ Use loopback devices for storage
‣ Great for dev work and validation testing

Wednesday, July 27, 11

How to Deploy (Small Cluster)

‣ Two load-balanced proxies
‣ Five storage nodes
‣ This area needs work

Wednesday, July 27, 11

How to Deploy (Large Cluster)

‣ Five zones
‣ Two proxies per zone
‣ Many storage nodes per zone

Wednesday, July 27, 11

How to Deploy (Large Cluster, networking)

‣ 10g external network
‣ 1g (or 10g) internal network
‣ Use-case concerns
‣ Internal proxy network divided by replica count

Wednesday, July 27, 11

How to Deploy (Large Cluster, IO)

‣ Dedicated Container and Account servers
‣ Few, relative to object servers
‣ Many IOPS (i.e. SSDs)
‣ Cheap storage for Object servers

Wednesday, July 27, 11

Future Dev Work

‣ Better Ring
‣ Layered zones
‣ Unique-of-zones-as-possible
‣ Tiered storage
‣ More modular deployment
‣ Cabinets, not zones
‣ More features

Wednesday, July 27, 11

What Swift is “Missing”

‣ Auth
‣ ID management
‣ Stats
‣ Quotas
‣ Billing
‣ CDN

Wednesday, July 27, 11

Questions?

‣ #openstack on freenode
‣ http://launchpad.net/swift
‣ http://d.not.mn/swift_overview_oscon2011.pdf

Wednesday, July 27, 11

John Dickinson

‣ @notmyname
‣ http://gplus.to/notmyname
‣ me@not.mn
‣ http://not.mn

Wednesday, July 27, 11

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This document introduces OpenStack, an open source cloud operating system. It discusses how OpenStack automates and controls pools of compute, storage, and networking resources to efficiently allocate resources and empower users and developers through self-service portals and APIs. OpenStack originated from NASA and Rackspace and is now powering both private and public clouds with an ecosystem of over 100 contributors. The document encourages participation in the OpenStack community through conferences, mailing lists, and social media.

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OpenStack is an open source cloud computing platform that provides infrastructure as a service. It supports both public and private clouds. The main OpenStack projects are Nova for compute services, Swift for object storage, and Glance for image services. Nova uses technologies like KVM, Xen, and VMware for virtualization and provides an API compatible with Amazon EC2. Swift is a highly scalable object storage system using a ring architecture to distribute data across commodity servers.

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This document discusses making Nova infrastructure components highly available and fault tolerant. It proposes an active-passive setup for MySQL and RabbitMQ using Linux HA (Heartbeat) and shared storage. The goals are to have Nova-network, Nova-scheduler and Nova-api be highly available without complex configurations. It describes testing high availability of Nova-network by simulating failures and verifying connectivity. Problems with network disconnect times are discussed and sending gratuitous ARPs is proposed to address it. Lastly, it invites discussion on ideas and concerns for making the different Nova components highly available.

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NASA's Nebula cloud computing platform began in 2009 as an internal project to provide on-demand computing resources for NASA researchers and reduce costs associated with underutilized servers. It was later open sourced along with Rackspace to form OpenStack, one of the first platforms built by the US government for cloud computing. Today Nebula provides cloud services across multiple NASA centers and continues to work on expanding access and capabilities to better support NASA's missions and research goals into the future.

Snapshot clone-boot-presentation-finalOpen Stack

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This document provides information about the OpenStack Conference & Design Summit, including: - Over 550 people are expected to attend with over 425 attending the Design Summit - The conference will take place April 26-29 and include 135 sessions over 4 days - Attendees can access the agenda online or through an Etherpad link - OpenStack has grown significantly since its first Design Summit in November 2010 - The Cactus release included over 4,700 contributions and 40+ new features - Jonathan Bryce will provide a project update and the leaders of Swift, Nova, and Glance will discuss their projects

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Gregory Holt proposes a simpler Container Sync feature for OpenStack Swift that replicates objects across geographically distinct clusters with fewer configuration options than originally planned. The new approach replicates all objects from a source container to a destination container without tracking remote replica counts. It allows per-container sync configuration and could support migrating accounts between clusters. Key components include updating the Swift API and adding a new daemon to handle background synchronization between clusters.

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The document proposes an architecture for improving collaboration between staff and volunteers on Wikimedia projects. It involves setting up a test/development OpenStack cluster that is a clone of the production environment. This would allow volunteers liberal access to test proposed changes without affecting production. The architecture aims to provide privilege escalation for non-ops users and an environment for testing major changes. Key aspects include using OpenStack, LDAP, Puppet, PowerDNS, Gerrit and CloudInit to manage the test/dev cluster and integrate tools like MediaWiki, Nova and DNS.

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The document discusses Mach Technology's presentation on their next-generation integrated managed services solution utilizing OpenStack. Mach Technology is an Australian technology solutions company that is developing a fully automated and multi-tenant cloud platform using OpenStack to provide a range of IaaS, PaaS, and SaaS services to customers. The presentation provides an overview of Mach Technology, their cloud definition and security lessons, as well as their solution architecture and rollout strategy for their next-generation project utilizing OpenStack.

OpenStack on IntelOpen Stack

This document discusses how growth in internet users, devices, and data is driving new requirements for data centers. It notes that virtualization and hosting applications are driving the majority of new server purchases. Many new servers will be virtualized and used in environments where power and space are limited. This creates opportunities to improve efficiency and reduce excess IT spending through solutions that simplify management of virtualized infrastructure. The document also outlines challenges around security, efficiency, manageability and lock-in that cloud and virtualized computing aim to address.

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Openstack and eBay Open Stack

Neal Sample discusses eBay's global commerce platform and hybrid cloud strategy. Some key points: - eBay has a large online marketplace with over 200 million listings, generating $62 billion in annual sales. It has over 23 million lines of code and stores 9 petabytes of data. - eBay uses "cloud bursting" to reduce costs by increasing datacenter efficiency. This allows it to offload extra workload to the cloud during peak periods. - The hybrid cloud model lowers costs by direct traffic to the most economical location, either internal datacenters of different tiers or external cloud providers. - A financial model and cost-benefit analysis show that maintaining 4,000 internal servers while bursting to the cloud

OpenStack Opportunity - CitrixOpen Stack

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PaaS on OpenstackOpen Stack

The document discusses different approaches to Platform as a Service (PaaS) and proposes building a PaaS on OpenStack to provide more control without complexity. It describes existing PaaS offerings like Google App Engine, Heroku, and Amazon Elastic Beanstalk that emphasize simplicity over control. The proposed OpenStack-based PaaS would use GigaSpaces technology to offer deployment, management, high availability, scalability, multi-tenancy, and monitoring capabilities while allowing flexibility to choose operating systems, middleware stacks, and other configuration options. It demonstrates deploying and managing a Cassandra service and discusses the current status of integrating GigaSpaces with OpenStack.

Cloud Service Providers and OpenStackOpen Stack

The document discusses considerations for companies looking to become OpenStack cloud service providers (CSPs). It outlines two main strategies for CSPs - a commodity approach using open source software and white label hardware targeting developers, or an enterprise approach using proprietary software and branded hardware targeting infrastructure executives. The document also provides a lifecycle for OpenStack CSPs, from assessing market opportunities to ongoing business growth. The recommendations are to choose a strategy, understand CSP lifecycle requirements, map them to capabilities, and create a lifecycle plan to guide the direction as an OpenStack CSP.

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