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[HBASE-5311] Allow inmemory Memstore compactions
...Just like we periodically compact the StoreFiles we should also periodically compact the MemStore.During these compactions we eliminate deleted cells, expired cells, cells to removed because...
, 2017-04-07, 00:05
[HBASE-6562] Fake KVs are sometimes passed to filters
...In internal tests at Salesforce we found that fake row keys sometimes are passed to filters (Filter.filterRowKey(...) specifically).The KVs are eventually filtered by the StoreScanner/ScanQu...
, 2017-04-05, 23:15
[HBASE-15431] A bunch of methods are hot and too big to be inlined
...I ran HBase with "-XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlining" and then looked for "hot method too big" log lines.I'll attach a log of those messages.I tried to i...
, 2017-03-02, 07:04
[HBASE-16765] New SteppingRegionSplitPolicy, avoid too aggressive spread of regions for small tables.
...We just did some experiments on some larger clusters and found that while using IncreasingToUpperBoundRegionSplitPolicy generally works well and is very convenient, it does tend to produce t...
, 2017-03-01, 05:14
[HBASE-17440] [0.98] Make sure DelayedClosing chore is stopped as soon as an HConnection is closed
...We're seeing many issue with run-away ZK client connection in long running app servers. 10k or more send or event threads are happening frequently.While I looked around in the code I noticed...
, 2017-01-10, 17:20
[HBASE-10247] Client promises about timestamps
...This is to start a discussion about timestamp promises declared per table of CF.For example if a client promises only monotonically increasing timestamps (or no custom set timestamps) and VE...
, 2016-12-28, 19:04
[HBASE-13094] Consider Filters that are evaluated before deletes and see delete markers
...That would be good for full control filtering of all cells, such as needed for some transaction implementations.Gary Helmling...
, 2016-12-18, 01:12
[HBASE-16115] Missing security context in RegionObserver coprocessor when a compaction/split is triggered manually
...We ran into an interesting phenomenon which can easily render a cluster unusable.We loaded some tests data into a test table and forced a manual compaction through the UI. We have some compa...
, 2016-12-12, 18:45
[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...
, 2016-12-09, 08:08
[HBASE-14613] Remove MemStoreChunkPool?
...I just stumbled across MemStoreChunkPool. The idea behind is to reuse chunks of allocations rather than letting the GC handle this.Now, it's off by default, and it seems to me to be of dubio...
, 2016-10-07, 04:26
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