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[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-9746] RegionServer can't start when replication tries to replicate to an unknown host
...Just ran into this:13/10/11 00:37:02 [regionserver60020] WARN zookeeper.ZKConfig(204): java.net.UnknownHostException: <old-host>: Name or service not known at java.net.Inet6Addre...
, 2013-12-03, 21:43
[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-10060] Unsynchronized scanning
...HBASE-10015 has some lengthy discussion. The solution there ended up replacing synchronized with ReentrantLock, which - somewhat surprisingly - yielded a non-trivial improvement for tall tab...
, 2013-12-01, 09:03
[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
[HBASE-5954] Allow proper fsync support for HBase
...At least get recommendation into 0.96 doc and some numbers running w/ this hdfs feature enabled....
, 2013-11-29, 05:35
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