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[ZOOKEEPER-1413] Use on-disk transaction log for learner sync up - Zookeeper - [issue]
...Motivation:The learner syncs up with leader by retrieving committed log from the leader. Currently, the leader only keeps 500 entries of recently committed log in memory. If the learner fall...
http://issues.apache.org/jira/browse/ZOOKEEPER-1413    Author: Thawan Kooburat, 2013-10-14, 16:55
[ZOOKEEPER-1624] PrepRequestProcessor abort multi-operation incorrectly - Zookeeper - [issue]
...We found this issue when trying to issue multiple instances of the following multi-op concurrentlymulti {1. create sequential node /a- 2. create node /b}The expected result is that only the ...
http://issues.apache.org/jira/browse/ZOOKEEPER-1624    Author: Thawan Kooburat, 2013-10-10, 20:06
[ZOOKEEPER-1729] Add l4w command "snap" to trigger log rotation and snapshotting - Zookeeper - [issue]
..."snap" command can be used to trigger log rotate and snapshotting on each server. One use case for this command is to make server restart faster by issuing snap command before restarting the...
http://issues.apache.org/jira/browse/ZOOKEEPER-1729    Author: Thawan Kooburat, 2013-10-08, 23:47
[ZOOKEEPER-1551] Observers ignore txns that come after snapshot and UPTODATE - Zookeeper - [issue]
...In Learner.java, txns which comes after the learner has taken the snapshot (after NEWLEADER packet) are stored in packetsNotCommitted. The follower has special logic to apply these txns at t...
http://issues.apache.org/jira/browse/ZOOKEEPER-1551    Author: Thawan Kooburat, 2013-10-08, 17:34
[ZOOKEEPER-1462] Read-only server does not initialize database properly - Zookeeper - [issue]
...Brief Description:When a participant or observer get partitioned and restart as Read-only server. ZkDb doesn't get reinitialized. This causes the RO server to drop any incoming request with ...
http://issues.apache.org/jira/browse/ZOOKEEPER-1462    Author: Thawan Kooburat, 2013-10-02, 23:42
Re: Please help me to understand ReadOnly Zookeeper behaviors - Zookeeper - [mail # user]
...I don't have answers for your questions but I can explain a bit more about how RO server works.  Essentially,  it allow the servers to start serving request while there is no leade...
   Author: Thawan Kooburat, 2013-10-02, 03:35
[ZOOKEEPER-1552] Enable sync request processor in Observer - Zookeeper - [issue]
...Observer doesn't forward its txns to SyncRequestProcessor. So it never persists the txns onto disk or periodically creates snapshots. This increases the start-up time since it will get the e...
http://issues.apache.org/jira/browse/ZOOKEEPER-1552    Author: Thawan Kooburat, 2013-10-01, 12:11
[ZOOKEEPER-1758] Add documentation for zookeeper.observer.syncEnabled flag - Zookeeper - [issue]
http://issues.apache.org/jira/browse/ZOOKEEPER-1758    Author: Thawan Kooburat, 2013-10-01, 12:11
[ZOOKEEPER-1757] Adler32 may not be sufficient to protect against data corruption - Zookeeper - [issue]
...I was investigating data inconsistency bug in our internal branch. One possible area is snapshot/txnlog corruption. So I wrote a more robust corruption test and found that it is easy to brea...
http://issues.apache.org/jira/browse/ZOOKEEPER-1757    Author: Thawan Kooburat, 2013-09-14, 03:04
Re: determining ZK latency issues - Zookeeper - [mail # user]
...Since you mentioned that you have a high load such that you need to disable fsync  I would suggested that you might want to start monitoring JVM stats (via JMX) such as heap or gc activ...
   Author: Thawan Kooburat, 2013-08-09, 02:35
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