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[HBASE-9680] 0.94 backport: HBASE-7404 Bucket Cache:A solution about CMS,Heap Fragment and Big Cache on HBASE
...See latest 0.94 patch on HBASE-7404....
, 2013-12-13, 18:16
[HBASE-7600] TestAdmin.testCreateBadTables is failing occasionally
...See in a 0.94 test run.Looks like in some cases it is possible to create two tables with the same name, which is worrisome.java.lang.AssertionError: expected:<1> but was:<2> at o...
, 2013-12-13, 11:46
[HBASE-9025] Potential Thread safety issue in MetaScanner
...I just saw this in a test run in 0.94:Stacktracejava.lang.NullPointerException at java.util.TreeMap.getEntry(TreeMap.java:324) at java.util.TreeMap.get(TreeMap.java:255) at org.apache.hadoop...
, 2013-12-08, 05:11
[HBASE-5002] Control replication peer per column family.
...With HBASE-2196 in place. Would be nice if we could control per CF to which peer(s) it is replicated.Could have a new option REPLICATION_PEERS, which holds a , separated list of replication ...
, 2013-12-08, 04:43
[HBASE-5164] Better HTable resource consumption in CoprocessorHost
...HBASE-4805 allows for more control over HTable's resource consumption.This is currently not used by CoprocessorHost (even though it would even be more critical to control this inside the Reg...
, 2013-12-08, 04:41
[HBASE-7347] Allow multiple readers per storefile
...Currently each store file is read only through the single reader regardless of how many concurrent read requests access that file.This issue is to explore alternate designs....
, 2013-12-08, 02:01
[HBASE-6476] Replace all occurrances of System.currentTimeMillis() with EnvironmentEdge equivalent
...There are still some areas where System.currentTimeMillis() is used in HBase. In order to make all parts of the code base testable and (potentially) to be able to configure HBase's notion of...
, 2013-12-08, 01:37
[HBASE-9553] Pad HFile blocks to a fixed size before placing them into the blockcache
...In order to make it easy on the garbage collector and to avoid full compaction phases we should make sure that all (or at least a large percentage) of the HFile blocks as cached in the block...
, 2013-12-08, 01:36
[HBASE-9840] Large scans and BlockCache evictions problems
...I just ran into a scenario that baffled me first, but after some reflection makes sense. I ran a very large scan that filled up most of the block cache with my scan's data. I ran that scan a...
, 2013-12-03, 21:31
[HBASE-9915] Performance: isSeeked() in EncodedScannerV2 always returns false
...While debugging why reseek is so slow I found that it is quite broken for encoded scanners.The problem is this:AbstractScannerV2.reseekTo(...) calls isSeeked() to check whether scanner was s...
, 2013-11-30, 03:11
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