diff options
Diffstat (limited to 'Feature Planning/GlusterFS 3.7/Clone of Snapshot.md')
-rw-r--r-- | Feature Planning/GlusterFS 3.7/Clone of Snapshot.md | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/Feature Planning/GlusterFS 3.7/Clone of Snapshot.md b/Feature Planning/GlusterFS 3.7/Clone of Snapshot.md new file mode 100644 index 0000000..ca6304c --- /dev/null +++ b/Feature Planning/GlusterFS 3.7/Clone of Snapshot.md @@ -0,0 +1,100 @@ +Feature +------- + +Clone of a Snapshot + +Summary +------- + +GlusterFS volume snapshot provides point-in-time copy of a GlusterFS +volume. When we take a volume snapshot, the newly created snap volume is +a read only volume. + +By this feature, this snap volume can be later 'cloned' to create a new +regular volume which contains the same contents of snapshot bricks. This +is a space efficient clone therefore it will be created instantaneously +and will share the disk space in the back-end, just like a snapshot and +the origin volume. + +Owners +------ + +Mohammed Rafi KC <rkavunga@redhat.com> + +Current status +-------------- + +Requiremnt for openstack manila. + +Detailed Description +-------------------- + +Snapshot create will take point-in-time snapshot of a volume. upon +successful completion, it will create a new read/only volume. But the +new volume is not considered as a regular volume, which prevents us to +perform any volume related operations on this snapshot volume. The +ultimate aim of this feature is creating a new regular volume out of +this snap. + +For e.g.: + + gluster snapshot create snap1 vol1 + +The above command will create a read-only snapshot "snap1" from volume +vol1. + + gluster snapshot clone share1 snap1 + +The above command will create a regular gluster volume share1 from +snap1. + +Benefit to GlusterFS +-------------------- + +We will have a writable snapshot. + +Scope +----- + +### Nature of proposed change + +Modification to glusterd snapshot code. + +### Implications on manageability + +glusterd,gluster cli + +### Implications on 'GlusterFS' backend + +There will be performance degradation for the first write of a each +block of main volume. + +### Modification to GlusterFS metadata + +none + +How To Test +----------- + +create a volume Take snapshot create a clone. start the clone. cloned +volume should support all operation for a regular volume. + +User Experience +--------------- + +there will an additional cli option for snapshot. gluster snapshot clone +```<clonename> <snapname> [<description> <description test>] [force]``` + +Dependencies +------------ + +Documentation +------------- + +Status +------ + +In development + +Comments and Discussion +----------------------- |