SheepDog changelog

Changelog History

Page 2

• v0.9.4._rc0

  July 19, 2016

• v0.9.3 Changes

  🆕 NEW FEATURE:

  • store driver "tree": Puts data objects into separate subdirectories based on their object ID, and meta objects into different directory from data objects. This is useful for massive cluster.
  • recovery speed throttling: Limits the number of objects being transferred from one sheep process to another when recovery. This will increase the recovery time but reduce the impact on the application.
  • wildcard recovery: Lets a sheep process search all objects from all nodes when it is launched. This enables us to upgrade a cluster even if object placement strategy is changed.

  SHEEP COMMAND INTERFACE:

  • new option "-R" to set recovery speed throttling (default: no throttle)
  • new option "-W" to enable wildcard recovery (default: disabled)

  DOG COMMAND INTERFACE:

  • new command "dog upgrade" to upgrade inode, epoch and config files and object location from old version
  • new subcommand "dog node format" to set store driver
  • new subsubcommand "get-throttle" and "set-throttle" to "dog node recovery" to get/set recovery speed throttling

• v0.9.2 Changes

  DOG COMMAND INTERFACE:

  • new option "-l" to "dog cluster format" to enable VDI lock (default: disabled)

• v0.9.1 Changes

  DOG COMMAND INTERFACE:

  • enhance "dog vdi lock unlock" to unlock shared-locked VDI by tgtd

• v0.9.0 Changes

  🆕 NEW FEATURE:

  • new object reclaim scheme: Sheep uses new garbage collection algorithm for reclaiming objects. Disk consumption of deleted VDIs are reduced dramatically. -- In addition, the limitation of maximum number of children (snapshots and clones) is resolved. Creating more than 1024 snapshots or clones from single virtual disk is allowed.
  • iSCSI multipath: now tgtd isn't a single point of failure
  • VDI locking: opening single VDI by multiple QEMU process is not allowed

  DOG COMMAND INTERFACE:

  • output format of "dog vdi snapshot" with -v option is changed
  • remove "dog vdi object"
    • instead, "dog vdi object location" is the new name of the previous "dog vdi object"
  • new subcommand "dog vdi object map" for printing map of inode objects
  • new option "-l" to "dog node kill" for killing sheep daemon on localhost without specifying ID
  • allow snapshot tags which start with decimal number (e.g. "123abc")
  • enhance "dog cluster snapshot' to restore previous default format redundancy.
    • add a version control to cluster snapshot.
    • 'cluster snapshot' layout is changed and DO NOT keep backward compatibility.

• v0.8.0 Changes

  🆕 NEW FEATURE:

  • hyper volume: use B-tree structure to replace index-array in sd_inode so the max size of vdi could extent from 4TB to 16PB.
  • Erasure Code: a new redundancy scheme that uses error correction algorithm to achieves high available of data with much less storage overhead compared to complete replication
  • HTTP simple storage: a new interface to retrieve any amount of data with a simple web services interface.

  DOG COMMAND INTERFACE:

  • new subcommand "vdi cache purge" for cleaning stale object cache
    • "vdi cache purge" cleans stale cache of all images
    • "vdi cache purge " cleans stale cache of the specified image
  • new subcommand "node stat" for showing I/O status of the node
  • new subcommand "node log level" for changing log level at runtime
    • "node log level set" sets loglevel of running sheep process
    • "node log level get" gets loglevel from running sheep process
    • "node log level list" lists available loglevels
  • new option "-o" of "vdi track", for tracking objects with their oids
  • new option "-y" of "vdi create", for create hyper-volume vdi
  • new option "-s" of "cluster info", show backend store information
  • new option "-t" of "cluster format", choose not serve write request if number of nodes is not sufficient
  • modify option "-c" of "vdi create", we can specify "x:y" for erasure code
  • new subcommand "node stat" for node request satistics
    • "node stat -w" set watch mode for this command

  SHEEP COMMAND INTERFACE:

  • improvements of help messages
  • change format of the size format in -j (journaling) and -w (object cache) options. The new format is: n[TtGgMmKkb]. e.g. "-j size=1024M".
  • rotate log when sheep process catches SIGHUP signal
  • remove "-o" option for choosing stdout as an output of log
  • remove "-f" option for executing sheep as a foreground process
    • "-o" and "-f" is a same thing to "-l dst=stdout"
  • unified "-l" option
    • "-l format=..." for log format
    • "-l level=..." for log level
    • "-l dst=..." for log destination
  • new option '-r' to enable http service
  • modify option "-c" of "cluster format", we can specify "x:y" for erasure code

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