glusterfs.git/xlators/cluster/afr/src/afr.c, branch v3.4.2qa3

Disable eager-locks on NetBSD for 3.4 branch

2013-10-24T12:21:26+00:00

As described in https://bugzilla.redhat.com/show_bug.cgi?id=1005526
eager-locks are broken on release-3.4, at least for NetBSD. This
change disable them by default, leaving the admin the possibility
to explicitely enable the feature if needed.

BUG: 1005526
Change-Id: I6f1b393865b103ec56ad5eb5143f59bb8672f19c
Signed-off-by: Emmanuel Dreyfus 
Reviewed-on: http://review.gluster.org/6020
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/afr: Empty string should not be default option val

2012-12-05T23:35:47+00:00

Glusterd does not allow empty string as default value. Changed
afr option values to disallow empty string as value.

Change-Id: I92a2d658907dbc6101e1139dd91f548acb5506f5
BUG: 859927
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/4271
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

cluster/afr: Provide option to disable readdir failover

2012-12-03T08:11:02+00:00

In a replica pair unlike files, directories may not have their
content in same order, so readdir for same (offset, size) may
not give same entries on both the sobvolumes of replica pair.
Switching over from one subvolume to another may not be a good
idea sometimes. It may lead to duplicate entries or fewer entries
or both. This patch provides a way to disable readdir-failover
so that applications like rebalance can retry if they want to.

Change-Id: I2b23eb224a2e84016a561362932613ac824c11a0
BUG: 859387
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/4159
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/afr: Added descriptions to afr options

2012-11-30T06:57:41+00:00

Change-Id: I4aef1c79743ee08b62e04d7b709f3e8c6b9dc56a
BUG: 881517
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/4244
Reviewed-by: Anand Avati 
Tested-by: Anand Avati

cluster/afr: Provide option to set readdir-size in entry-self-heal

2012-10-01T19:39:36+00:00

Problem:
Entry self-heal does lookups on all the entries that are read
in readdir. More the size of readdir more number of lookups happen
in parallel. It is observed that it leads to HUGE cpu spikes
rendering everything else on the system unusable.

Fix:
Provided the option self-heal-readdir-size to configure the size.
Default value is at 1KB.

Tests:
Checked that the readdirs are happening with the configured value
in entry-self-heal.

Change-Id: Icaa937ad88857e6f9a12375b1e7f6a49192bc8b1
BUG: 860895
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/4002
Tested-by: Gluster Build System 
Reviewed-by: Jeff Darcy 
Reviewed-by: Anand Avati

afr: add option description of 'open'.

2012-09-07T01:25:19+00:00

Signed-off-by: Jules Wang 
Change-Id: I6c7dd337c758e82e9d58d4d65f53b5aa72ac5dfb
BUG: 764890
Reviewed-on: http://review.gluster.org/3895
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

xlator options: remove overwritten data-self-heal initializer

2012-07-12T02:11:21+00:00

In the struct volume_options, the "data-self-heal"
.default_value = "" setting appeared before a setting of
.default_value = "on".  Remove the former.

Change-Id: Ieddcc18f61581f9448d806cd8bf8eefaaf0118b9
BUG: 789278
Signed-off-by: Jim Meyering 
Reviewed-on: http://review.gluster.com/3589
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

cluster/afr: post-op-delay support

2012-07-04T07:17:47+00:00

post-op-delay introduces an artificial delay between the OP and
POST-OP-CHANGELOG phases of a write transaction to increase the
probability of changelog-piggyback and eager-locking to work
more efficiently.

Also enable eager-locking by default.

Change-Id: I865ca4b68512c44818719c7e388952f15d53e6c2
BUG: 836033
Signed-off-by: Anand Avati 
Reviewed-on: http://review.gluster.com/3621
Tested-by: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

cluster/afr: add a new option to select read-subvol by index

2012-07-03T21:07:10+00:00

read subvolume is a nice option to set prefred read child if you have a
replication over 2 datacenter.  if you have 2 datacenter and have a
distributed replication where one set of servers are in datacenter one
and the other (the replicated) are in the other datacenter
read-subvolume it not very handy since it goes over name and the
subvolume name is different for each replication pair.  i added a new
option called read-subvolume-index which take the number of the
subvolume to choose.  0 fo first , 1 for second and so on subvolume in
every replication.  this option can now be used in the --xlator-option
mount option to choose the prefered read child for all replication at
once.  For Example on all clients in datacenter one you can use
--xlator-option=volumename-replication-*.read-subvolume-index=0 to
prefer read from the servers in datacenter one.  when you expand or
shrink the volume no changes are needed to the client config since the
wildcard will set this option automatic on reconfigure.

Change-Id: I3b47432f77037c380ff4a6296636c6f8fc953db9
BUG: 837420
Original-author: domwo 
Signed-off-by: domwo 
Signed-off-by: Jeff Darcy 
Reviewed-on: http://review.gluster.com/3615
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

libglusterfs : Fix validation for integer volume options.

2012-06-07T18:42:10+00:00

Integer volume options which specified only the min value as 0, would not be
validated during "volume set".
The range check for an option happened only if  both min and max were not 0. In
the above case, even though a minium was specified, the range check did not
happen as both min and max were 0.

To allow forced validation in such cases, a new member, "validate", has been
added to volume_options_t. This member takes the values GF_OPT_VALIDATE_BOTH,
GF_OPT_VALIDATE_MIN and GF_OPT_VALIDATE_MAX (GF_OPT_VALIDATE_BOTH is the
default).

Change-Id: I351de0eedb6028120e5c0b073ee5d9c141dee717
BUG: 809847
Signed-off-by: Kaushal M 
Reviewed-on: http://review.gluster.com/3084
Tested-by: Gluster Build System 
Reviewed-by: Amar Tumballi 
Reviewed-by: Anand Avati