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diff --git a/doc/admin-guide/en-US/markdown/admin_object_storage.md b/doc/admin-guide/en-US/markdown/admin_object_storage.md new file mode 100644 index 00000000000..71edab64536 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_object_storage.md @@ -0,0 +1,26 @@ +# SwiftOnFile + +SwiftOnFile project enables GlusterFS volume to be used as backend for Openstack +Swift - a distributed object store. This allows objects PUT over Swift's RESTful +API to be accessed as files over filesystem interface and vice versa i.e files +created over filesystem interface (NFS/FUSE/native) can be accessed as objects +over Swift's RESTful API. + +SwiftOnFile project was formerly known as `gluster-swift` and also as `UFO +(Unified File and Object)` before that. More information about SwiftOnFile can +be found [here](https://github.com/swiftonfile/swiftonfile/blob/master/doc/markdown/quick_start_guide.md). +There are differences in working of gluster-swift (now obsolete) and swiftonfile +projects. The older gluster-swift code and relevant documentation can be found +in [icehouse branch](https://github.com/swiftonfile/swiftonfile/tree/icehouse) +of swiftonfile repo. + +## SwiftOnFile vs gluster-swift + +| Gluster-Swift | SwiftOnFile | +|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:| +| One GlusterFS volume maps to and stores only one Swift account. Mountpoint Hierarchy: `container/object` | One GlusterFS volume or XFS partition can have multiple accounts. Mountpoint Hierarchy: `acc/container/object` | +| Over-rides account server, container server and object server. We need to keep in sync with upstream Swift and often may need code changes or workarounds to support new Swift features | Implements only object-server. Very less need to catch-up to Swift as new features at proxy,container and account level would very likely be compatible with SwiftOnFile as it's just a storage policy. | +| Does not use DBs for accounts and container.A container listing involves a filesystem crawl.A HEAD on account/container gives inaccurate or stale results without FS crawl. | Uses Swift's DBs to store account and container information. An account or container listing does not involve FS crawl. Accurate info on HEAD to account/container – ability to support account quotas. | +| GET on a container and account lists actual files in filesystem. | GET on a container and account only lists objects PUT over Swift. Files created over filesystem interface do not appear in container and object listings. | +| Standalone deployment required and does not integrate with existing Swift cluster. | Integrates with any existing Swift deployment as a Storage Policy. | + |