diff options
| author | Joseph Fernandes <josferna@redhat.com> | 2015-09-18 19:57:54 +0530 |
|---|---|---|
| committer | Dan Lambright <dlambrig@redhat.com> | 2015-10-08 12:00:31 -0700 |
| commit | 58d1a9be562630bd1ed8af3e496ca05e087adece (patch) | |
| tree | 5feb32ff9e6ad3c38d87759589426471a4044671 /xlators/cluster/dht/src/dht-messages.h | |
| parent | 81d4aa18b3a1cdad0e0e8df43fe4c8c141c06618 (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.
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>
Diffstat (limited to 'xlators/cluster/dht/src/dht-messages.h')
| -rw-r--r-- | xlators/cluster/dht/src/dht-messages.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-messages.h b/xlators/cluster/dht/src/dht-messages.h index 80b35557408..61631e682f8 100644 --- a/xlators/cluster/dht/src/dht-messages.h +++ b/xlators/cluster/dht/src/dht-messages.h @@ -40,7 +40,7 @@ */ #define GLFS_DHT_BASE GLFS_MSGID_COMP_DHT -#define GLFS_DHT_NUM_MESSAGES 106 +#define GLFS_DHT_NUM_MESSAGES 107 #define GLFS_MSGID_END (GLFS_DHT_BASE + GLFS_DHT_NUM_MESSAGES + 1) /* Messages with message IDs */ @@ -993,5 +993,14 @@ */ #define DHT_MSG_HAS_MIGINFO (GLFS_DHT_BASE + 106) + +/* + * @messageid 109107 + * @diagnosis + * @recommendedaction None + */ + +#define DHT_MSG_LOG_IPC_TIER_ERROR (GLFS_DHT_BASE + 107) + #define glfs_msg_end_x GLFS_MSGID_END, "Invalid: End of messages" #endif /* _DHT_MESSAGES_H_ */ |