diff options
| author |   RajithaY <rajithax.yerrumsetty@intel.com> | 2017-04-25 03:31:15 -0700 |
|---|---|---|
| committer | Rajitha Yerrumchetty <rajithax.yerrumsetty@intel.com> | 2017-05-22 06:48:08 +0000 |
| commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
| tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/docs/live-block-ops.txt | |
| parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) | |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/docs/live-block-ops.txt')
| -rw-r--r-- | qemu/docs/live-block-ops.txt | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/qemu/docs/live-block-ops.txt b/qemu/docs/live-block-ops.txt deleted file mode 100644 index a25708740..000000000 --- a/qemu/docs/live-block-ops.txt +++ /dev/null @@ -1,58 +0,0 @@ -LIVE BLOCK OPERATIONS -===================== - -High level description of live block operations. Note these are not -supported for use with the raw format at the moment. - -Snapshot live merge -=================== - -Given a snapshot chain, described in this document in the following -format: - -[A] -> [B] -> [C] -> [D] - -Where the rightmost object ([D] in the example) described is the current -image which the guest OS has write access to. To the left of it is its base -image, and so on accordingly until the leftmost image, which has no -base. - -The snapshot live merge operation transforms such a chain into a -smaller one with fewer elements, such as this transformation relative -to the first example: - -[A] -> [D] - -Currently only forward merge with target being the active image is -supported, that is, data copy is performed in the right direction with -destination being the rightmost image. - -The operation is implemented in QEMU through image streaming facilities. - -The basic idea is to execute 'block_stream virtio0' while the guest is -running. Progress can be monitored using 'info block-jobs'. When the -streaming operation completes it raises a QMP event. 'block_stream' -copies data from the backing file(s) into the active image. When finished, -it adjusts the backing file pointer. - -The 'base' parameter specifies an image which data need not be streamed from. -This image will be used as the backing file for the active image when the -operation is finished. - -In the example above, the command would be: - -(qemu) block_stream virtio0 A - - -Live block copy -=============== - -To copy an in use image to another destination in the filesystem, one -should create a live snapshot in the desired destination, then stream -into that image. Example: - -(qemu) snapshot_blkdev ide0-hd0 /new-path/disk.img qcow2 - -(qemu) block_stream ide0-hd0 - - |