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[HBASE-8229] Replication code logs like crazy if a target table cannot be found. - HBase - [issue]
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...One of our RS/DN machines ran out of diskspace on the partition to which we write the log files.It turns out we still had a table in our source cluster with REPLICATION_SCOPE=>1 that did ...
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http://issues.apache.org/jira/browse/HBASE-8229
Author: Lars Hofhansl,
2013-04-17, 19:33
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[HBASE-7801] Allow a deferred sync option per Mutation. - HBase - [issue]
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...Won't have time for parent. But a deferred sync option on a per operation basis comes up quite frequently.In 0.96 this can be handled cleanly via protobufs and 0.94 we can have a special mut...
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http://issues.apache.org/jira/browse/HBASE-7801
Author: Lars Hofhansl,
2013-04-16, 10:44
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[HBASE-4210] Allow coprocessor to interact with batches per region sent from a client - HBase - [issue]
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...Currently the coprocessor write hooks - {pre|post}{Put|Delete} - are strictly one row|cell operations.It might be a good idea to allow a coprocessor to deal with batches of puts and del...
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http://issues.apache.org/jira/browse/HBASE-4210
Author: Lars Hofhansl,
2013-04-16, 04:47
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[HBASE-7255] KV size metric went missing from StoreScanner. - HBase - [issue]
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...In trunk due to the metric refactor, at least the KV size metric went missing.See this code in StoreScanner.java: } finally { if (cumulativeMetric ...
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http://issues.apache.org/jira/browse/HBASE-7255
Author: Lars Hofhansl,
2013-04-13, 04:07
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[HBASE-8316] JoinedHeap for non essential column families should reseek instead of seek - HBase - [issue]
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...This was raised by the Phoenix team. During a profiling session we noticed that catching the joinedHeap up to the current rows via seek causes a performance regression, which makes the joine...
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http://issues.apache.org/jira/browse/HBASE-8316
Author: Lars Hofhansl,
2013-04-12, 05:15
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Re: Essential column family performance - HBase - [mail # user]
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...Also the unittest tests with only 10000 rows that would all fit in the memstore. Seek vs reseek should make little difference for the memstore. We tested with 1m and 10m rows, and flus...
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Author: Lars Hofhansl,
2013-04-10, 01:17
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[HBASE-6505] Allow shared RegionObserver state - HBase - [issue]
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http://issues.apache.org/jira/browse/HBASE-6505
Author: Lars Hofhansl,
2013-04-07, 06:16
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[HBASE-6427] Pluggable compaction and scan policies via coprocessors - HBase - [issue]
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...When implementing higher level stores on top of HBase it is necessary to allow dynamic control over how long KVs must be kept around.Semi-static config options for ColumnFamilies (# of versi...
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http://issues.apache.org/jira/browse/HBASE-6427
Author: Lars Hofhansl,
2013-04-07, 06:16
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[HBASE-6522] Expose locks and leases to Coprocessors - HBase - [issue]
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...Currently it is not possible for CP to implement any of checkAndMutate type operations, because coprocessor have no way create a lock, because getLock is private HRegion (interestingly Relea...
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http://issues.apache.org/jira/browse/HBASE-6522
Author: Lars Hofhansl,
2013-04-07, 06:13
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[HBASE-6496] Example ZK based scan policy - HBase - [issue]
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...Provide an example of a RegionServer that listens to a ZK node to learn about what set of KVs can safely be deleted during a compaction....
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http://issues.apache.org/jira/browse/HBASE-6496
Author: Lars Hofhansl,
2013-04-07, 05:32
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