OpenStack Storage (Swift)
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Samuel Merritt 2e155e5603 Make TempURL more cache-efficient.
So, there's two cases here. In one case, we have memcache enabled;
account info gets cached in the usual place, and tempurl keys get
cached separately. In the other case, we have no cache. In neither
case is anything gained by having TempURL cache keys separately from
the account info.

This commit removes TempURL's custom caching logic and makes it rely
on get_account_info() instead.

Benefits include:
 * immediate visibility of new keys on account POST
 * less data in the cache per account --> more stuff fits in cache
 * less code for bugs to hide in

Change-Id: Idb0b6c165da14196b4c79149c546f0159b54edcb
2013-06-19 11:44:47 -07:00
bin Merge "Add parallelism to object expirer daemon." 2013-06-11 22:48:24 +00:00
doc Remove Lucid/ppa instructions from SAIO guide 2013-06-13 18:29:06 -06:00
etc Merge "Add parallelism to object expirer daemon." 2013-06-11 22:48:24 +00:00
locale Reverted the pulling out of various middleware: 2012-05-16 21:25:10 +00:00
swift Make TempURL more cache-efficient. 2013-06-19 11:44:47 -07:00
test Make TempURL more cache-efficient. 2013-06-19 11:44:47 -07:00
.coveragerc Align tox.ini and fix coverage jobs in jenkins. 2012-06-08 20:05:14 -04:00
.functests Allow dot test runners from any dir 2012-12-07 14:08:49 -08:00
.gitignore fix dict duplicated key 2013-04-22 01:31:53 +04:00
.gitreview Add .gitreview config file for gerrit. 2011-10-24 15:05:49 -04:00
.mailmap copy X-Delete-At unless X-Fresh-Metadata: true is supplied on an object copy 2013-04-24 10:40:41 -04:00
.probetests Allow dot test runners from any dir 2012-12-07 14:08:49 -08:00
.unittests one dot, 5% increase in coverage 2012-12-17 09:45:46 -08:00
AUTHORS fix email address 2013-04-11 10:42:31 -07:00
babel.cfg add pybabel setup.py commands and initial .pot 2011-01-27 00:01:24 +00:00
CHANGELOG updated AUTHORS and CHANGELOG 2013-03-28 21:01:49 -07:00
CONTRIBUTING.md Add CONTRIBUTING file. 2012-11-21 11:23:15 -08:00
LICENSE Convert LICENSE to use unix style line endings. 2012-12-19 12:48:27 -05:00
MANIFEST.in Add requirements files to the source distribution 2013-06-03 19:26:20 +04:00
README.md new more helpful README 2012-09-13 20:59:41 -07:00
requirements.txt Rename requires files to standard names. 2013-05-30 22:14:01 +00:00
setup.cfg Change setup.cfg style. 2013-04-02 15:55:56 +04:00
setup.py Rename requires files to standard names. 2013-05-30 22:14:01 +00:00
test-requirements.txt Rename requires files to standard names. 2013-05-30 22:14:01 +00:00
tox.ini Rename requires files to standard names. 2013-05-30 22:14:01 +00:00

Swift

A distributed object storage system designed to scale from a single machine to thousands of servers. Swift is optimized for multi-tenancy and high concurrency. Swift is ideal for backups, web and mobile content, and any other unstructured data that can grow without bound.

Swift provides a simple, REST-based API fully documented at http://doc.openstack.org/.

Swift was originally developed as the basis for Rackspace's Cloud Files and was open-sourced in 2010 as part of the OpenStack project. It has since grown to include contributions from many companies and has spawned a thriving ecosystem of 3rd party tools. Swift's contributors are listed in the AUTHORS file.

Docs

To build documentation install sphinx (pip install sphinx), run python setup.py build_sphinx, and then browse to /doc/build/html/index.html. These docs are auto-generated after every commit and available online at http://docs.openstack.org/developer/swift/.

For Developers

The best place to get started is the "SAIO - Swift All In One". This document will walk you through setting up a development cluster of Swift in a VM. The SAIO environment is ideal for running small-scale tests against swift and trying out new features and bug fixes.

You can run unit tests with .unittests and functional tests with .functests.

Code Organization

  • bin/: Executable scripts that are the processes run by the deployer
  • doc/: Documentation
  • etc/: Sample config files
  • swift/: Core code
    • account/: account server
    • common/: code shared by different modules
      • middleware/: "standard", officially-supported middleware
      • ring/: code implementing Swift's ring
    • container/: container server
    • obj/: object server
    • proxy/: proxy server
  • test/: Unit and functional tests

Data Flow

Swift is a WSGI application and uses eventlet's WSGI server. After the processes are running, the entry point for new requests is the Application class in swift/proxy/server.py. From there, a controller is chosen, and the request is processed. The proxy may choose to forward the request to a back- end server. For example, the entry point for requests to the object server is the ObjectController class in swift/obj/server.py.

For Deployers

Deployer docs are also available at http://docs.openstack.org/developer/swift/. A good starting point is at http://docs.openstack.org/developer/swift/deployment_guide.html

You can run functional tests against a swift cluster with .functests. These functional tests require /etc/swift/test.conf to run. A sample config file can be found in this source tree in test/sample.conf.

For Client Apps

For client applications, official Python language bindings are provided at http://github.com/openstack/python-swiftclient.

Complete API documentation at http://docs.openstack.org/api/openstack-object-storage/1.0/content/


For more information come hang out in #openstack-swift on freenode.

Thanks,

The Swift Development Team