diff options
| author | Susant Palai <spalai@redhat.com> | 2018-03-09 20:07:19 +0530 |
|---|---|---|
| committer | Amar Tumballi <amarts@redhat.com> | 2018-04-10 01:09:29 +0000 |
| commit | 48623a33a0ef38f6c99208b0580954d7d7c80e76 (patch) | |
| tree | bbe9aa572b36a41c3c64b93c43f2d43fd2634bd1 /xlators/mgmt/glusterd/src/glusterd-volgen.c | |
| parent | f946d98a95249c8d906323e6419ec8538467d2ab (diff) | |
experimental/cloudsync: Download xlator for archival feature
spec-files:
https://review.gluster.org/#/c/18854/
Overview:
* Cloudsync maintains three file states in it's inode-ctx i.e
1 - LOCAL,
2 - REMOTE,
3 - DOWNLOADING.
* A data modifying fop is allowed only if the state is LOCAL.
If the state is REMOTE or DOWNLOADING, client will download
or wait for the download to finish initiated by other client.
* Multiple download and upload from different clients are synchronized
by inodelk.
* In POSIX a state check is done (part of different commit)before
allowing the fop to continue. If the state is remote/downloading the
fop is unwound with EREMOTE. The client will then download the file
and continue with the fop again.
* Basic Algo for fop (let's say write fop):
- If LOCAL -> resume fop
- If REMOTE ->
- INODELK
- STAT (this gets state and heal the state if needed)
- DOWNLOAD
- resume fop
Note:
* Developers will need to write plugins for download, based on the
remote store they choose. In phase-1, support will be added for
one remote store per volume. In future, more options for multiple
remote stores will be explored.
TODOs:
- Implement stat/lookup/readdirp to return size info from xattr
- Make plugins configurable
- Implement unlink fop
- Add metrics collection
- Add sharding support
Design Contributions:
Aravinda V K <avishwan@redhat.com>
Amar Tumballi <amarts@redhat.com>
Ram Ankireddypalle <areddy@commvault.com>
Susant Palai <spalai@redhat.com>
updates: #387
Change-Id: Iddf711ee7ab4e946ae3e472ff62791a7b85e6d4b
Signed-off-by: Susant Palai <spalai@redhat.com>
Diffstat (limited to 'xlators/mgmt/glusterd/src/glusterd-volgen.c')
| -rw-r--r-- | xlators/mgmt/glusterd/src/glusterd-volgen.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c index caf421165f8..f31311b3b5f 100644 --- a/xlators/mgmt/glusterd/src/glusterd-volgen.c +++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c @@ -4679,6 +4679,18 @@ client_graph_builder (volgen_graph_t *graph, glusterd_volinfo_t *volinfo, if (ret) return -1; + ret = dict_get_str_boolean (set_dict, "features.cloudsync", _gf_false); + if (ret == -1) + goto out; + + if (ret) { + xl = volgen_graph_add (graph, "features/cloudsync", volname); + if (!xl) { + ret = -1; + goto out; + } + } + ret = -1; xl = volgen_graph_add_as (graph, "debug/io-stats", volname); if (!xl) |