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[HBASE-10419] Add multiget support to PerformanceEvaluation - HBase - [issue]
...Folks planning to use multiget may find this useful....
http://issues.apache.org/jira/browse/HBASE-10419    Author: Nick Dimiduk, 2014-04-08, 08:14
Re: HBase 0.94 - TableMapReduceUtil class, overloaded method "initTableMapperJob" behaves differently - HBase - [mail # dev]
...I vaguely recall a ticket being raised and committed for this problem, butthe bug is clearly present and I'm not finding the issue. Maybe @larshrecalls?On Mon, Apr 7, 2014 at 2:48 PM, Ted Yu...
   Author: Nick Dimiduk, 2014-04-07, 22:15
[HBASE-10091] Exposing HBase DataTypes to non-Java interfaces - HBase - [issue]
...Access to the DataType implementations introduced in HBASE-8693 is currently limited to consumers of the Java API. It is not easy to specify a data type in non-Java environments, such as the...
http://issues.apache.org/jira/browse/HBASE-10091    Author: Nick Dimiduk, 2014-04-01, 18:11
Re: HBase performance evaluation - HBase - [mail # dev]
...HBase is primarily a storage system, not a computation system, so there areno CPU-bound workloads as such. I suppose you can try to artificiallyincrease CPU load on the RegionServers by usin...
   Author: Nick Dimiduk, 2014-03-31, 16:37
Re: Test HBase throughput with ycsb - HBase - [mail # dev]
...I'll add: YCSB is able to run mixed read and write workload while PerfEvaldoes not. This is something I'd like to add in the future. Last I looked,the official YCSB didn't support HBase vers...
   Author: Nick Dimiduk, 2014-03-25, 05:14
Re: Backup HMasters will go down if the zk connection expires without recovery - HBase - [mail # dev]
...I agree that resuming the process is best handled by site-local tooling.Could be we do a better job of informing that tooling regarding the natureof the failure. Well defined exit codes, for...
   Author: Nick Dimiduk, 2014-03-21, 16:37
[HBASE-10792] RingBufferTruck does not release its payload - HBase - [issue]
...Run a write-heavy workload (PerfEval sequentialWrite) out of a trunk sandbox and watch as HBase eventually dies with an OOM: heap space. Examining the heap dump shows an extremely large reta...
http://issues.apache.org/jira/browse/HBASE-10792    Author: Nick Dimiduk, 2014-03-20, 17:23
Re: Eventual consistency in Hbase - HBase - [mail # user]
...Consistency between replicated clusters (across data centers) isasynchronous and can also be considered "eventual". From within a singlecluster, only a single node is responsible for serving...
   Author: Nick Dimiduk, 2014-03-17, 19:42
[HBASE-10741] Deprecate HTablePool and HTableFactory - HBase - [issue]
...Per parent ticket, deprecate these ways to retrieve an HTable instance....
http://issues.apache.org/jira/browse/HBASE-10741    Author: Nick Dimiduk, 2014-03-15, 01:12
Re: ClusterConnection package private - HBase - [mail # dev]
...Taking advantage of region replicas will require the indirection andpotential network hop. Could be a "short-circuit" local read optimizationis possible, but I don't think it worth it for sc...
   Author: Nick Dimiduk, 2014-03-14, 22:24
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