diff options
| author | vmallika <vmallika@redhat.com> | 2015-03-18 23:17:23 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2015-03-18 18:24:12 -0700 |
| commit | 3e18f093974c85ac92a4c48f0cd13aa9ff9c5cac (patch) | |
| tree | 6bbdd814492a3e7dcf6e9a06f49a373926f970dd /xlators/lib/src | |
| parent | fa50fcb6dddf4d7d0094c26cee802fd942f62727 (diff) | |
features/quota : Introducing inode quota
==========================================================================
Inode quota
==========================================================================
= Currently, the only way to retrieve the number of files/objects in a =
= directory or volume is to do a crawl of the entire directory/volume. =
= This is expensive and is not scalable. =
= =
= The proposed mechanism will provide an easier alternative to determine =
= the count of files/objects in a directory or volume. =
= =
= The new mechanism proposes to store count of objects/files as part of =
= an extended attribute of a directory. Each directory's extended =
= attribute value will indicate the number of files/objects present =
= in a tree with the directory being considered as the root of the tree. =
= =
= The count value can be accessed by performing a getxattr(). =
= Cluster translators like afr, dht and stripe will perform aggregation =
= of count values from various bricks when getxattr() happens on the key =
= associated with file/object count. =
A new interface is introduced:
------------------------------
limit-objects : limit the number of inodes at directory level
list-objects : list the directories where the limit is set
remove-objects : remove the limit from the directory
==========================================================================
CLI COMMAND:
gluster volume quota <volname> limit-objects <path> <number> [<percent>]
* <number> is a hard-limit for number of objects limitation for path "<path>"
If hard-limit is exceeded, creation of file/directory is no longer
permitted.
* <percent> is a soft-limit for number of objects creation for path "<path>"
If soft-limit is exceeded, a warning is issued for each creation.
CLI COMMAND:
gluster volume quota <volname> remove-objects [path]
==========================================================================
CLI COMMAND:
gluster volume quota <volname> list-objects [path] ...
Sample output:
------------------
Path Hard-limit Soft-limit Used Available
Soft-limit exceeded?
Hard-limit exceeded?
------------------------------------------------------------------------
--------------------------------------
/dir 10 80% 10 0
Yes
Yes
==========================================================================
[root@snapshot-28 dir]# ls
a b file11 file12 file13 file14 file15 file16 file17
[root@snapshot-28 dir]# touch a1
touch: cannot touch `a1': Disk quota exceeded
* Nine files are created in directory "dir" and directory is included in
* the
count too. Hence the limit "10" is reached and further file creation
fails
==========================================================================
Note: We have also done some re-factoring in cli for volume name
validation. New function cli_validate_volname is created
==========================================================================
Change-Id: I1823497de4f790a2a20ebb1770293472ea33ee2b
BUG: 1190108
Signed-off-by: Sachin Pandit <spandit@redhat.com>
Signed-off-by: vmallika <vmallika@redhat.com>
Reviewed-on: http://review.gluster.org/9769
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/lib/src')
| -rw-r--r-- | xlators/lib/src/libxlator.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/xlators/lib/src/libxlator.h b/xlators/lib/src/libxlator.h index 175d3141d45..404124ca7d3 100644 --- a/xlators/lib/src/libxlator.h +++ b/xlators/lib/src/libxlator.h @@ -33,6 +33,7 @@ #define MARKER_XTIME_TYPE 2 #define GF_XATTR_QUOTA_SIZE_KEY "trusted.glusterfs.quota.size" #define GF_XATTR_QUOTA_LIMIT_LIST "trusted.limit.list" +#define GF_XATTR_QUOTA_LIMIT_LIST_OBJECT "trusted.limit.objects" typedef int32_t (*xlator_specf_unwind_t) (call_frame_t *frame, |