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Anoop Sam John
Stephen Yuan Jiang
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[HBASE-9440] Pass blocks of KVs from HFile scanner to the StoreFileScanner and up
...Currently we read KVs from an HFileScanner one-by-one and pass them up the scanner/heap tree. Many time the ranges of KVs retrieved from StoreFileScanner (by StoreScanners) and HFileScanner ...
, 2016-07-18, 09:20
[HBASE-15881] Allow BZIP2 compression
...BZIP2 is a very efficient compressor in terms of compression rate.Compression speed is very slow, de-compression is equivalent or faster than GZIP....
, 2016-06-20, 19:44
[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...
, 2016-06-19, 05:27
[HBASE-14869] Better request latency and size histograms
...I just discussed this with a colleague.The get, put, etc, histograms that each region server keeps are somewhat useless (depending on what you want to achieve of course), as they are aggrega...
, 2016-06-16, 23:47
[HBASE-15452] Consider removing checkScanOrder from StoreScanner.next
...In looking why we spent so much time in StoreScanner.next when doing a simple Phoenix count(*) query I came across checkScanOrder. Not only is this a function dispatch (that the JIT woul...
, 2016-03-15, 13:09
[HBASE-13082] Coarsen StoreScanner locks to RegionScanner
...Continuing where HBASE-10015 left of.We can avoid locking (and memory fencing) inside StoreScanner by deferring to the lock already held by the RegionScanner.In tests this shows quite a scan...
, 2016-03-05, 07:22
[HBASE-13068] Unexpected client exception with slow scan
...I just came across in interesting exception:Caused by: java.io.IOException: Call 10 not added as the connection newbunny/127.0.0.1:60020/ClientService/lars (auth:SIMPLE)/60000 is closing&nbs...
, 2016-01-11, 07:19
[HBASE-15084] Remove references to repository.codehaus.org
...repository.codehause.org is not longer active.A dns-lookup reveals an alias to stop-looking-at.repository-codehaus-org All repositories have been moved to Maven central, so it can just remov...
, 2016-01-09, 22:18
[HBASE-15054] Allow 0.94 to compile with JDK8
...Fix the following two problems: PoolMap InputSampler...
, 2016-01-05, 05:41
[HBASE-14539] Slight improvement of StoreScanner.optimize
...While looking at the code I noticed that StoreScanner.optimize does not some unnecessary work. This is a very tight loop and even just looking up a reference can throw off the CPUs cache lin...
, 2015-12-22, 10:36
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