1. 15 Dec, 2011 1 commit
  2. 29 Aug, 2011 1 commit
    • Kevin Wolf's avatar
      qemu-img: Require larger zero areas for sparse handling · a22f123c
      Kevin Wolf authored
      By default, require 4k of consecutive zero bytes for qemu-img to make the
      output file sparse by not issuing a write request for the zeroed parts. Add an
      -S option to allow users to tune this setting.
      
      This helps to avoid situations where a lot of zero sectors and data sectors are
      mixed and qemu-img tended to issue many tiny 512 byte writes.
      Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
      a22f123c
  3. 20 Jul, 2011 1 commit
  4. 05 Jul, 2011 1 commit
    • Federico Simoncelli's avatar
      qemu-img: Add cache command line option · 661a0f71
      Federico Simoncelli authored
      qemu-img currently writes disk images using writeback and filling
      up the cache buffers which are then flushed by the kernel preventing
      other processes from accessing the storage.
      This is particularly bad in cluster environments where time-based
      algorithms might be in place and accessing the storage within
      certain timeouts is critical.
      This patch adds the option to choose a cache method when writing
      disk images.
      Signed-off-by: default avatarFederico Simoncelli <fsimonce@redhat.com>
      Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
      661a0f71
  5. 07 Apr, 2011 1 commit
  6. 22 Oct, 2010 1 commit
    • edison's avatar
      Copy snapshots out of QCOW2 disk · 51ef6727
      edison authored
      In order to backup snapshots, created from QCOW2 iamge, we want to copy snapshots out of QCOW2 disk to a seperate storage.
      The following patch adds a new option in "qemu-img": qemu-img convert -f qcow2 -O qcow2 -s snapshot_name src_img bck_img.
      Right now, it only supports to copy the full snapshot, delta snapshot is on the way.
      
      Changes from V1: all the comments from Kevin are addressed:
      Add read-only checking
      Fix coding style
      Change the name from bdrv_snapshot_load to bdrv_snapshot_load_tmp
      Signed-off-by: default avatarDisheng Su <edison@cloud.com>
      Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
      51ef6727
  7. 13 Jul, 2010 1 commit
  8. 22 May, 2010 1 commit
  9. 03 May, 2010 1 commit
  10. 14 Mar, 2010 1 commit
  11. 13 Jan, 2010 1 commit
    • Kevin Wolf's avatar
      qemu-img rebase · 3e85c6fd
      Kevin Wolf authored
      This adds a rebase subcommand to qemu-img which allows to change the backing
      file of an image.
      
      In default mode, both the current and the new backing file need to exist, and
      after the rebase, the COW image is guaranteed to have the same guest visible
      content as before. To achieve this, old and new backing file are compared and,
      if necessary, data is copied from the old backing file into the COW image.
      
      With -u an unsafe mode is enabled that doesn't require the backing files to
      exist. It merely changes the backing file reference in the COW image. This is
      useful for renaming or moving the backing file. The user is responsible to make
      sure that the new backing file has no changes compared to the old one, or
      corruption may occur.
      Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
      Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
      3e85c6fd
  12. 09 Nov, 2009 1 commit
  13. 07 Jun, 2009 1 commit