Changelog

Changelogs

v0.4.0

• farm storage driver

  Sheepdog storage driver is replaced with the farm driver, which gives us much more benefits than the original simple store driver. For more information, visit the below links:

  https://github.com/collie/sheepdog/wiki/Backend-Stores-and-Object-Cache

  https://github.com/collie/sheepdog/blob/master/doc/farm-internal.txt

• object cache

  Object cache is the first cache implementation of Sheepdog. It caches object data on the gateway node, and the cached data will be replicated to storage nodes when the client sends a flush request.

  Object cache is something like a client-side caching, so please note that if cached data is not flushed, other clients on different gateways cannot see the latest data. If you keep in mind it, the feature will really helpful to boost your VM performance.

  See also: https://github.com/collie/sheepdog/wiki/Backend-Stores-and-Object-Cache

• sheepfs

  With this feature, we can access and control Sheepdog with a filesystem interface. You need to install libfuse development headers to compile sheepfs. For more information, see also: https://github.com/collie/sheepdog/wiki/Sheepfs

• gateway node

  When you want to split Sheepdog nodes and VM nodes, it is not recommended to connect from qemu to one of sheep nodes directly because the connected node can be a SPOF. The gateway node is necessary for such users. If you run gateway sheeps on VM nodes and qemu connects to the local gateway sheep, no storage node can be a SPOF.

• object list cache

  When sheep stores lots of objects, it would be a bottleneck of object recovery to enumerate all objects. The object list cache caches the list of stored objects and improves object recovery performance.

• cluster driver cleanups

  Cluster driver interface is largely redesigned and refined, and lots of relevant bugs are fixed from the previous version.

• zookeeper cluster driver

  Zookeeper driver is completely rewritten by Yunkai, and Taobao guys show that we can run Sheepdog with 1,000 nodes with ZooKeeper.

• many bug fixes

  There are so many bug fixes from 0.3.0. See commit logs for more details.