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Re: Coprocessor / threading model - HBase - [mail # user]
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...Andrew, could you explain more, why doing cross-table operation is an anti-pattern of using CP? Durability might be an issue, as far as I understand. Thanks, Best Regards, Wei &...
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Author: Wei Tan,
2013-01-15, 18:44
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Re: Meaure server time of Get/Scan - through RPC logging? - HBase - [mail # user]
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...Hmm... I appreciate it if anybody can point me how to measure server side Get/Scan time... Thanks! Best Regards, Wei From: Wei Tan/Watson/IBM To: &nb...
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Author: Wei Tan,
2012-12-09, 02:41
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Meaure server time of Get/Scan - through RPC logging? - HBase - [mail # user]
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...Hi I am using YCSB to measure the performance of some complex Get/Scan, i.e., with some filters. I found that I got weird high latency from YCSB client but both HBase server and ...
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Author: Wei Tan,
2012-12-02, 17:21
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RE: Hbase MapReduce - HBase - [mail # user]
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...Actually coprocessor can be used to implement MR-like function, while not using Hadoop framework. Best Regards, Wei Wei Tan Research Staff Member IBM T. ...
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Author: Wei Tan,
2012-11-25, 06:26
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RE: Retrieve Put timestamp - HBase - [mail # user]
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...I wonder if there is any follow up on this issue, i.e., a put can return a timestamp of the record? Thanks! Best Regards, Wei From: Wei Tan/Watson/IBM To: &nb...
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Author: Wei Tan,
2012-11-14, 00:08
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readRequestsCount: 2 in one read - HBase - [mail # user]
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...Hi, I am monitoring the readRequestsCount shown in the "Requests" column in the web GUI of a server/region. I observe that, while a put correspond to ONE write reque...
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Author: Wei Tan,
2012-10-16, 19:29
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RE: connect to the region from coprocessor - HBase - [mail # user]
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...Thank you Anoop and that is a very helpful suggestion. Best Regards, Wei From: Anoop Sam John To: "[EMAIL PROTECTED]" , "[EMAIL PR...
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Author: Wei Tan,
2012-10-11, 17:45
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connect to the region from coprocessor - HBase - [mail # user]
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...Hi, In my preput coprocessor I would like to get the old value of the row been input. Now I am creating a HTable instance and using the get interface; function wise it work...
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Author: Wei Tan,
2012-10-09, 20:35
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Re: A general question on maxVersion handling when we have Secondary index tables - HBase - [mail # dev]
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...Thanks for sharing a pointer to your implementation. My two cents: timestamp is a way to do MVCC and setting every KV with the same TS will get concurrency control very tricky an...
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Author: Wei Tan,
2012-08-28, 15:52
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Re: Coprocessor tests under busy insertions - HBase - [mail # user]
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...I encountered a similar problem in my CP. I think the issue is, you seem to use YCSB to put a lot of records in a short period of time. By default YCSB has a big write buff...
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Author: Wei Tan,
2012-08-13, 13:57
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