diff options
| author | Joseph Fernandes <josferna@redhat.com> | 2015-09-18 19:57:54 +0530 |
|---|---|---|
| committer | Dan Lambright <dlambrig@redhat.com> | 2015-10-09 16:58:53 -0700 |
| commit | 489f02879afd940d201d092720dbf13b2922b134 (patch) | |
| tree | 1d29e56c9307b0f7722c757bc6d807aeed289d4d /xlators/cluster/dht/src/dht-mem-types.h | |
| parent | d777b2feaf55347177d6786657d68cc0547f7f73 (diff) | |
tier/ctr: Solution for db locks for tier migrator and ctr using sqlite version less than 3.7 i.e rhel 6.7
Problem: On RHEL 6.7, we have sqlite version 3.6.2 which doesnt support
WAL journaling mode, as this journaling mode is only available in sqlite 3.7 and above.
As a result we cannot have to progreses concurrently accessing sqlite, without
running into db locks! Well WAL is also need for performace on CTR side.
Solution: This solution is to use CTR db connection for doing queries when WAL mode is
absent. i,e tier migrator will send sync_op ipc calls to CTR, which in turn will
do the query and create/update the query file suggested by tier migrator.
Pending: Well this solution will stop the db locks but the performance is still an issue for CTR.
We are developing an in-Memory Transaction Log (iMeTaL) which will help boost the CTR
performance by doing in memory udpates on the IO path and later flush the updates to
the db in a batch/segment flush.
Master patch: http://review.gluster.org/#/c/12191
>> Change-Id: Ie3149643ded159234b5cc6aa6cf93b9022c2f124
>> BUG: 1240577
>> Signed-off-by: Joseph Fernandes <josferna@redhat.com>
>> Signed-off-by: Dan Lambright <dlambrig@redhat.com>
>> Signed-off-by: Joseph Fernandes <josferna@redhat.com>
>> Reviewed-on: http://review.gluster.org/12191
>> Tested-by: Gluster Build System <jenkins@build.gluster.com>
>> Reviewed-by: Luis Pabon <lpabon@redhat.com>
Signed-off-by: Joseph Fernandes <josferna@redhat.com>
Change-Id: Ie8c7a7e9566244c104531b579126bb57fbc6e32b
BUG: 1270123
Reviewed-on: http://review.gluster.org/12325
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Dan Lambright <dlambrig@redhat.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-mem-types.h')
| -rw-r--r-- | xlators/cluster/dht/src/dht-mem-types.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-mem-types.h b/xlators/cluster/dht/src/dht-mem-types.h index e3a38ed7e03..a90b5710745 100644 --- a/xlators/cluster/dht/src/dht-mem-types.h +++ b/xlators/cluster/dht/src/dht-mem-types.h @@ -35,6 +35,7 @@ enum gf_dht_mem_types_ { gf_dht_mt_octx_t, gf_dht_mt_miginfo_t, gf_tier_mt_bricklist_t, + gf_tier_mt_ipc_ctr_params_t, gf_dht_mt_end }; #endif |