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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...A side question: if HTablePool is not encouraged to be used... how we handle the thread safeness in using HTable? Any replacement for HTablePool, in plan? Thanks, Best Reg...
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Author: Wei Tan,
2013-02-19, 15:15
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...Well, my experience shows: 1. A local read can be >10ms and a remote put can be 1-2ms. Due to the nature of LSM a read is always a scan to one or multiple files. A very ...
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Author: Wei Tan,
2013-02-18, 17:56
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...Is your CheckAndPut involving a local or remote READ? Due to the nature of LSM, read is much slower compared to a write... Best Regards, Wei From: Prakash K...
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Author: Wei Tan,
2013-02-18, 05:52
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HBase /lib directory contains any json processing util? - HBase - [mail # user]
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...We need to parse JSON in a coprocessor and if HBase /lib directory contains any json processing util, we can avoid introducing additional jars. Thanks! Best Regards, Wei...
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Author: Wei Tan,
2013-02-01, 01:03
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Re: Coprocessor HDFS jar hot deployment - HBase - [mail # user]
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...Thanks. I may try this approach later. Now I am using a remote cluster to test and I have this workaround: mvn install and skip test copy the cp to the remote cluster mvn install with ...
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Author: Wei Tan,
2013-02-01, 01:02
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maven junit test of a coprocessor - HBase - [mail # user]
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...Hi, I am writing a maven junit test for a HBase coprocessor. The problem is that, I want to write a junit test that deploy the cp jar into a cluster, and test its function. Howev...
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Author: Wei Tan,
2013-01-31, 07:27
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Re: copy table AND descriptor - HBase - [mail # user]
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...Hi Ted, Thanks for your remind. I made it in two steps: 1. write a java problem to create a table using original table's descriptor. 2. use ./bin/hbase org.apache.hadoop.hbase.ma...
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Author: Wei Tan,
2013-01-30, 03:58
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copy table AND descriptor - HBase - [mail # user]
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...Hi I have a table in cluster 1 with quite lengthy metadata (aka, descriptor). How can I replicate the data as well as descriptor to another table? CopyTable, Export/Import does n...
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Author: Wei Tan,
2013-01-29, 21:54
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Which version has FuzzyRowFilter? - HBase - [mail # user]
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...Hi, I did a quick lookup and found these two threads related to FuzzyRowFilter status: https://issues.apache.org/jira/browse/HBASE-7628 https://issues.apache.org/jira/browse/HBA...
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Author: Wei Tan,
2013-01-23, 19:08
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Re: Coprocessor / threading model - HBase - [mail # user]
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...Thanks Andrew for your detailed clarification. Now I understand that in general, the system is subject to CAP theorem. You want good consistency AND latency, then partition tolerance n...
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Author: Wei Tan,
2013-01-15, 22:41
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