| Commit message (Collapse) | Author | Age | Files | Lines |
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stopped any volume
Problem: After enabled brick mux if any volume has down and then try ot run mount
with running volume , mount command is hung.
Solution: After enable brick mux server has shared one data structure server_conf
for all associated subvolumes.After down any subvolume in some
ungraceful manner (remove brick directory) posix xlator sends
GF_EVENT_CHILD_DOWN event to parent xlatros and server notify
updates the child_up to false in server_conf.When client is trying
to communicate with server through mount it checks conf->child_up
and it is FALSE so it throws message "translator are not yet ready".
From this patch updated structure server_conf to save child_up status
for xlator wise. Another improtant correction from this patch is
cleanup threads from server side xlators after stop the volume.
BUG: 1453977
Change-Id: Ic54da3f01881b7c9429ce92cc569236eb1d43e0d
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
Reviewed-on: https://review.gluster.org/17356
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>
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Summary:
Halo Geo-replication is a feature which allows Gluster or NFS clients to write
locally to their region (as defined by a latency "halo" or threshold if you
like), and have their writes asynchronously propagate from their origin to the
rest of the cluster. Clients can also write synchronously to the cluster
simply by specifying a halo-latency which is very large (e.g. 10seconds) which
will include all bricks.
In other words, it allows clients to decide at mount time if they desire
synchronous or asynchronous IO into a cluster and the cluster can support both
of these modes to any number of clients simultaneously.
There are a few new volume options due to this feature:
halo-shd-latency: The threshold below which self-heal daemons will
consider children (bricks) connected.
halo-nfsd-latency: The threshold below which NFS daemons will consider
children (bricks) connected.
halo-latency: The threshold below which all other clients will
consider children (bricks) connected.
halo-min-replicas: The minimum number of replicas which are to
be enforced regardless of latency specified in the above 3 options.
If the number of children falls below this threshold the next
best (chosen by latency) shall be swapped in.
New FUSE mount options:
halo-latency & halo-min-replicas: As descripted above.
This feature combined with multi-threaded SHD support (D1271745) results in
some pretty cool geo-replication possibilities.
Operational Notes:
- Global consistency is gaurenteed for synchronous clients, this is provided by
the existing entry-locking mechanism.
- Asynchronous clients on the other hand and merely consistent to their region.
Writes & deletes will be protected via entry-locks as usual preventing
concurrent writes into files which are undergoing replication. Read operations
on the other hand should never block.
- Writes are allowed from _any_ region and propagated from the origin to all
other regions. The take away from this is care should be taken to ensure
multiple writers do not write the same files resulting in a gfid split-brain
which will require resolution via split-brain policies (majority, mtime &
size). Recommended method for preventing this is using the nfs-auth feature to
define which region for each share has RW permissions, tiers not in the origin
region should have RO perms.
TODO:
- Synchronous clients (including the SHD) should choose clients from their own
region as preferred sources for reads. Most of the plumbing is in place for
this via the child_latency array.
- Better GFID split brain handling & better dent type split brain handling
(i.e. create a trash can and move the offending files into it).
- Tagging in addition to latency as a means of defining which children you wish
to synchronously write to
Test Plan:
- The usual suspects, clang, gcc w/ address sanitizer & valgrind
- Prove tests
Reviewers: jackl, dph, cjh, meyering
Reviewed By: meyering
Subscribers: ethanr
Differential Revision: https://phabricator.fb.com/D1272053
Tasks: 4117827
Change-Id: I694a9ab429722da538da171ec528406e77b5e6d1
BUG: 1428061
Signed-off-by: Kevin Vigor <kvigor@fb.com>
Reviewed-on: http://review.gluster.org/16099
Reviewed-on: https://review.gluster.org/16177
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
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Currently these are few events related to child_up/down:
GF_EVENT_CHILD_UP : Issued when any of the protocol client
connects.
GF_EVENT_CHILD_MODIFIED : Issued by afr/dht/ec
GF_EVENT_CHILD_DOWN : Issued when any of the protocol client
disconnects.
These events get modified at the dht/afr/ec layers. Here is a
brief on the same.
DHT:
- All the subvolumes reported once, and atleast one child came
up, then GF_EVENT_CHILD_UP is issued
- connect GF_EVENT_CHILD_UP is issued
- disconnect GF_EVENT_CHILD_MODIFIED is issued
- All the subvolumes disconnected, GF_EVENT_CHILD_DOWN is issued
AFR:
- First subvolume came up, then GF_EVENT_CHILD_UP is issued
- Subsequent subvolumes coming up, results in GF_EVENT_CHILD_MODIFIED
- Any of the subvolumes go down, then GF_EVENT_SOME_CHILD_DOWN is issued
- Last up subvolume goes down, then GF_EVENT_CHILD_DOWN is issued
Until the patch [1] introduced GF_EVENT_SOME_CHILD_UP,
GF_EVENT_CHILD_MODIFIED was issued by afr/dht when any of the subvolumes
go up or down.
Now with md-cache changes, there is a necessity to differentiate between
child up and down. Hence, introducing GF_EVENT_SOME_DESCENDENT_DOWN/UP and
getting rid of GF_EVENT_CHILD_MODIFIED.
[1] http://review.gluster.org/12573
Change-Id: I704140b6598f7ec705493251d2dbc4191c965a58
BUG: 1396038
Signed-off-by: Poornima G <pgurusid@redhat.com>
Reviewed-on: http://review.gluster.org/15764
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: N Balachandran <nbalacha@redhat.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
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Change-Id: Ic2ba77a1fdd27801a6e579e04e6c0dd93cd7127b
BUG: 1326085
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: http://review.gluster.org/14011
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
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Change-Id: Ifd0ff278dcf43da064021f5c25e5dcd34347fcde
BUG: 1326085
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: http://review.gluster.org/13970
Smoke: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
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Change-Id: I7087476bbc00cd23ba65ea119bc0fe8a9bff347d
BUG: 1311124
Signed-off-by: Soumya Koduri <skoduri@redhat.com>
Reviewed-on: http://review.gluster.org/13498
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
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Minimal infrastructure changes for the seek() FOP. This will provide
SEEK_HOLE and SEEK_DATA functionalities.
BUG: 1220173
Change-Id: I4b74fce8b0bad2f45291fd2c2b9e243c4f4a1aa9
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/11480
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
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Fix a regression caused by commit#If7d59d
Change-Id: Ib2239b9b0e216302e6c89e21288592d35b8d124b
BUG: 1283983
Signed-off-by: Soumya Koduri <skoduri@redhat.com>
Reviewed-on: http://review.gluster.org/12708
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: jiffin tony Thottan <jthottan@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
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Replacing repetitive code like this with code generated from a more
compact "canonical" definition carries several advantages.
* Ease the process of adding new fops (e.g. GF_FOP_IPC).
* Ease the process of making global changes to existing fops (e.g.
adding "xdata").
* Ensure strict consistency between all of the pieces that must be
compatible with each other, through both kinds of changes.
What we have right now is just a start. The above benefits will only
truly be realized when we use the same definitions to generate stubs,
syncops, and perhaps even parts of gfapi or glupy.
This same infrastructure can also be used to reduce code duplication and
potential for error in many of our translators. NSR already uses a
similar technique, using a few hundred lines of templates to generate a
few *thousand* lines of code. The ability to make a global "aspect"
change (e.g. to quorum checking) in one place instead of seventy has
already been demonstrated there.
Other candidates for code generation include the AFR/EC transaction
infrastructure, or stub creation/resumption in io-threads.
Change-Id: If7d59de7a088848b557f5aea00741b4fe19017c1
BUG: 1271325
Signed-off-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-on: http://review.gluster.org/9411
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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