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[HBASE-11695] PeriodicFlusher and WakeFrequency issues
...We just ran into a flush storm caused by the PeriodicFlusher.Many memstore became eligible for flushing at exactly the same time, the effect we've seen is that the exact same region was flus...
, 2014-08-08, 07:28
[HBASE-9005] Improve documentation around KEEP_DELETED_CELLS, time range scans, and delete markers
...Without KEEP_DELETED_CELLS all timerange queries are broken if their range covers a delete marker.As some internal discussions with colleagues showed, this feature is not well understand and...
, 2014-08-07, 22:20
[HBASE-11667] Comment ClientScanner logic for NSREs.
...We ran into an issue with Phoenix where a RegionObserver coprocessor intercepts a scan and returns an aggregate (in this case a count) with a fake row key. It turns out this does not work wh...
, 2014-08-07, 01:24
[HBASE-11641] TestDistributedLogSplitting.testMasterStartsUpWithLogSplittingWork fails frequently
...3 out of last four run of my RC jenkins build failed in this test.Might be related to HBASE-11041 too....
, 2014-08-05, 22:31
[HBASE-11143] Improve replication metrics
...We are trying to report on replication lag and find that there is no good single metric to do that.ageOfLastShippedOp is close, but unfortunately it is increased even when there is nothing t...
, 2014-08-05, 04:36
[HBASE-11652] Port HBASE-3270 and HBASE-11650 to 0.94 - create cluster id and version file in a tmp location and move it into place
...See HBASE-3270 and HBASE-11650...
, 2014-08-03, 05:48
[HBASE-7336] HFileBlock.readAtOffset does not work well with multiple threads
...HBase grinds to a halt when many threads scan along the same set of blocks and neither read short circuit is nor block caching is enabled for the dfs client ... disabling the block cache mak...
, 2014-07-25, 21:09
[HBASE-7320] Remove KeyValue.getBuffer()
...In many places this is simple task of just replacing the method name.There, however, quite a few places where we assume that: the entire KV is backed by a single byte array the KVs key porti...
, 2014-06-28, 06:12
[HBASE-9272] A parallel, unordered scanner
...The contract of ClientScanner is to return rows in sort order. That limits the order in which region can be scanned.I propose a simple ParallelScanner that does not have this requirement and...
, 2014-06-23, 12:42
[HBASE-11351] Experiments with OffHeap memstores
...I have been experimenting with offheap memstores using an offheap BTree implementation of ConcurrentMap provided by MapDB (www.mapdb.org)So far I hooked this up in an experimental way with i...
, 2014-06-15, 04:58
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