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[HBASE-8166] Avoid writing the memstoreTS into HFiles when possible - HBase - [issue]
...See discussion in HBASE-8151.Upon compaction we can check all the involved HFiles. If all of them have a MAX_MEMSTORE_TS < the smallest scannner readpoint, we create a writer that does no...
http://issues.apache.org/jira/browse/HBASE-8166    Author: Lars Hofhansl, 2013-12-26, 19:47
[HBASE-10047] postScannerFilterRow consumes a lot of CPU in tall table scans - HBase - [issue]
...Continuing my profiling quest, I find that in scanning tall table (and filtering everything on the server) a quarter of the time is now spent in the postScannerFilterRow coprocessor hook....
http://issues.apache.org/jira/browse/HBASE-10047    Author: Lars Hofhansl, 2013-12-23, 03:35
[HBASE-5311] Allow inmemory Memstore compactions - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-5311    Author: Lars Hofhansl, 2013-12-17, 23:28
[HBASE-10076] Backport MapReduce over snapshot files [0.94] - HBase - [issue]
...MapReduce over Snapshots would be valuable on 0.94....
http://issues.apache.org/jira/browse/HBASE-10076    Author: Lars Hofhansl, 2013-12-17, 17:40
[HBASE-6562] Fake KVs are sometimes passed to filters - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-6562    Author: Lars Hofhansl, 2013-12-16, 20:30
[HBASE-9680] 0.94 backport: HBASE-7404 Bucket Cache:A solution about CMS,Heap Fragment and Big Cache on HBASE - HBase - [issue]
...See latest 0.94 patch on HBASE-7404....
http://issues.apache.org/jira/browse/HBASE-9680    Author: Lars Hofhansl, 2013-12-13, 18:16
[HBASE-7600] TestAdmin.testCreateBadTables is failing occasionally - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-7600    Author: Lars Hofhansl, 2013-12-13, 11:46
[HBASE-10145] Stale ZK state. Again. - HBase - [issue]
...HBASE-7600 fixed a race condition where concurrent attempts to create the same table could succeed.An unfortunate side effect is that it is now impossible to create a table as long as the ta...
http://issues.apache.org/jira/browse/HBASE-10145    Author: Lars Hofhansl, 2013-12-12, 21:53
[HBASE-10102] CF.VERSIONS is not enforced with timerange scans - HBase - [issue]
...Example brought up by Niels Basjes on the user list:If I do the following commands into the hbase shell    create 't1', {NAME => 'c1', VERSIONS => 1}    p...
http://issues.apache.org/jira/browse/HBASE-10102    Author: Lars Hofhansl, 2013-12-09, 22:48
[HBASE-9025] Potential Thread safety issue in MetaScanner - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-9025    Author: Lars Hofhansl, 2013-12-08, 05:11
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