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[HBASE-13082] Coarsen StoreScanner locks to RegionScanner - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-13082    Author: Lars Hofhansl, 2015-04-21, 06:19
[HBASE-13497] Remove MVCC stamps from HFile when that is safe - HBase - [issue]
...See discussion in HBASE-13389.The optimization was initially put in with HBASE-8166, HBASE-12600 undoes it, this will partially restores it.Instead of checking the MVCC readpoints against th...
http://issues.apache.org/jira/browse/HBASE-13497    Author: Lars Hofhansl, 2015-04-20, 02:17
[HBASE-13494] 0.98: Remove remove(K, V) from type PoolMap<K,V> - HBase - [issue]
...JDK7 will be EOL'ed this month. 0.98 should build with JDK8.Andrew Purtell +1'd this in parent.Unless I hear objections I'll commit this later today....
http://issues.apache.org/jira/browse/HBASE-13494    Author: Lars Hofhansl, 2015-04-18, 10:10
[HBASE-13362] Set max result size from client only (like scanner caching). - HBase - [issue]
...With the recent problems we've been seeing client/server result size mismatch, I was thinking: Why was this not a problem with scanner caching?There are two reasons: number of rows is easy t...
http://issues.apache.org/jira/browse/HBASE-13362    Author: Lars Hofhansl, 2015-04-09, 11:20
[HBASE-10060] Unsynchronized scanning - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-10060    Author: Lars Hofhansl, 2015-04-09, 06:46
[HBASE-13297] 0.98 and 1.0: Remove client side result size calculation - HBase - [issue]
...As described in parent, this can lead to missed rows when the client and server calculate different size values.The patch here proposes a backwards compatible patch for 0.98 and 1.0.x.Parent...
http://issues.apache.org/jira/browse/HBASE-13297    Author: Lars Hofhansl, 2015-04-06, 21:46
[HBASE-13352] Add hbase.import.version to Import usage. - HBase - [issue]
...We just tried to export some (small amount of) data out of an 0.94 cluster to 0.98 cluster. We used Export/Import for that.By default we found that the import M/R job correctly reports the n...
http://issues.apache.org/jira/browse/HBASE-13352    Author: Lars Hofhansl, 2015-04-05, 23:03
[HBASE-13303] Fix size calculation of results on the region server - HBase - [issue]
...One of the problems in the parent is due to different size calculation between client and server when HFilev3 is used.Since tags are never shipped to the client in a scan, we can have specia...
http://issues.apache.org/jira/browse/HBASE-13303    Author: Lars Hofhansl, 2015-03-28, 09:28
[HBASE-13333] Renew Scanner Lease without advancing the RegionScanner - HBase - [issue]
...We have a usecase (for Phoenix) where we want to let the server know that the client is still around. Like a client-side heartbeat.Doing a full heartbeat is complicated, but we could add the...
http://issues.apache.org/jira/browse/HBASE-13333    Author: Lars Hofhansl, 2015-03-28, 00:24
[HBASE-13109] Make better SEEK vs SKIP decisions during scanning - HBase - [issue]
...I'm re-purposing this issue to add a heuristic as to when to SEEK and when to SKIP Cells. This has come up in various issues, and I think I have a way to finally fix this now. HBASE-9778, HB...
http://issues.apache.org/jira/browse/HBASE-13109    Author: Lars Hofhansl, 2015-03-26, 01:22
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB