Home

Sheepdog wiki

Sheepdog is a distributed storage system for QEMU. It provides highly available block level storage volumes that can be attached to QEMU-based virtual machines. Sheepdog scales to several hundreds nodes, and supports advanced volume management features such as snapshot, cloning, and thin provisioning.

Enjoy!

User Guide

• Getting Started
• Cluster Management Backends
• Backend Stores and Object Cache
• Sheepfs
• General Protocol Support
• Migration from v0.3.0 (simple) to v0.4.0 (farm) - the right way?

Release Plan

The latest pulished version is the v0.4.0, with:

• a new store driver 'farm'
• an object cache support
• sheepfs
• a tracer support
• support for variable virtual nodes
• start sheep daemon as gateway
• cluster driver cleanups
• object list cache
• zookeeper cluster driver
• many bug fixes

See Changelog for more details.

• 0.5.0 is probably due to the end of september 2012, with:

  • differential backup of VDIs
  • variable object size
  • variable virtual nodes according to the free spaces
  • server-side write cache (write object without O_DSYNC, and sync them when qemu sends a flush request. I think we can use it combined with object cache.)
  • redesign threads for better performance
  • testing framework

• 1.0.0 is expected for the end of the year

Developer Guide

• Sheepdog Design

• Submit a Patch

• Google Summer of Code 2012

External Articles

• Setting up a Sheepdog cluster and exporting a volume to a KVM guest -- Daniel P. Berrangé (2011-10-11)