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[PHOENIX-5475] Add preWALAppend to DelegateRegionObserver for upcoming HBase 1.5.0 - Phoenix - [issue]
...HBase 1.5 SNAPSHOT only, see linked HBase issue....    Author: Lars Hofhansl , 2019-10-14, 19:32
[PHOENIX-5519] Metric for global read repairs due to concurrent updates - Phoenix - [issue]
...The global indexer cannot distinguish between (1) a prior update that failed to complete and (2) an ongoing update that hasn't finished, yet.In order to distinguish these cases the code uses...    Author: Lars Hofhansl , 2019-10-11, 22:24
[PHOENIX-5518] Unittests for global index read repair count - Phoenix - [issue]
...Kadir Ozdemir and I were tracking down a scenario where the read repair kept increasing.It turned out not to be a bug, but we realized that there is not test that checks whether the read rep...    Author: Lars Hofhansl , 2019-10-11, 20:15
[HBASE-21856] Consider Causal Replication Ordering - HBase - [issue]
...We've had various efforts to improve the ordering guarantees for HBase replication, most notably Serial Replication.I think in many cases guaranteeing a Total Replication Order is not requir...    Author: Lars Hofhansl , 2019-10-10, 22:18
[HBASE-22235] OperationStatus.{SUCCESS|FAILURE|NOT_RUN} are not visible to 3rd party coprocessors - HBase - [issue]
...preBatchMutate is useless for some operation due to this.See also TEPHRA-299. This looks like an oversight.MiniBatchOperationInProgress has limited visibility for coprocessors. OperationStat...    Author: Lars Hofhansl , 2019-10-07, 18:33
[HBASE-21590] Optimize trySkipToNextColumn in StoreScanner a bit - HBase - [issue]
...See latest comment on HBASE-17958...    Author: Lars Hofhansl , 2019-10-07, 18:24
[PHOENIX-5494] Batched, mutable Index updates are unnecessarily run one-by-one - Phoenix - [issue]
...I just noticed that index updates on mutable tables retrieve their deletes (to invalidate the old index entry) one-by-one.For batches, this can be the major time spent during an index update...    Author: Lars Hofhansl , 2019-09-27, 20:59
[HBASE-7801] Allow a deferred sync option per Mutation. - HBase - [issue]
...Won't have time for parent. But a deferred sync option on a per operation basis comes up quite frequently.In 0.96 this can be handled cleanly via protobufs and 0.94 we can have a special mut...    Author: Lars Hofhansl , 2019-09-27, 10:23
[PHOENIX-294] Avoid adding delete markers for rows when dropping a column - Phoenix - [issue]
...Talked to James a bit. Currently when a column is dropped we place delete markers for this column on each row. This is very inefficient when there are many row.Another option is to drop the ...    Author: Lars Hofhansl , 2019-09-27, 10:20
[PHOENIX-751] isFilterDone() not needed with nextRaw() - Phoenix - [issue]
...Hey James,just worked on and noticed that Phoenix unnecessarily calls RegionScaner.isFilterDone() in some (hot) places. isFilterDone() is sy...    Author: Lars Hofhansl , 2019-09-27, 10:20