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Re: Performance between HBaseClient scan and HFileReaderV2 - HBase - [mail # user]
...Hello Lars,  Yes, I used setCaching for getting more KeyValues in each RPC call. Also yes, when I used HFileReaderV2 I still reading from HDFS. Short circuiting is enabled but I don't k...
[+ more]    Author: Jerry Lam, 2014-01-02, 23:53
Re: Is HBaseAdmin thread-safe? - HBase - [mail # user]
...Hi HBase users:  I look at the code, hbaseadmin depends on HConnection. Is HConnectionImplementation thread-safe?  Best Regards,  Jerry   On Wed, Nov 7, 2012 at 6:21 PM, ...
[+ more]    Author: Jerry Lam, 2012-11-08, 19:32
Re: How to check if a major_compact is done? - HBase - [mail # user]
...Hi Yun:  Please refer to HBase Metric: http://hbase.apache.org/book/hbase_metrics.html The hbase.regionserver.compactionQueueSize seems promising but I'm not certain because I have neve...
   Author: Jerry Lam, 2012-11-08, 15:43
Re: Nosqls schema design - HBase - [mail # user]
...Hi Nick:  Your question is a good and tough one. I haven't find anything that helps in guiding the schema design in the nosql world. There are general concepts but none of them is close...
   Author: Jerry Lam, 2012-11-08, 15:32
Re: Best technique for doing lookup with Secondary Index - HBase - [mail # user]
...Can we enforce 2 regions to collocate together as a logical group?  On Fri, Oct 26, 2012 at 6:14 AM, fding hbase  wrote:  ...
   Author: Jerry Lam, 2012-10-26, 14:29
Re: Coprocessor end point vs MapReduce? - HBase - [mail # user]
...Hi JM:  There was a thread discussing M/R bulk delete vs. Coprocessor bulk delete. The thread subject is "Bulk Delete". The guy in that post suggested to write a HFile which contains al...
   Author: Jerry Lam, 2012-10-25, 20:43
Re: Using filters in REST/stargate returns 204 (No content) - HBase - [mail # user]
...Hi Suresh:  Have you tried to create a scanner without the filter? Does it return errors as well?  Best Regards,  Jerry  On Fri, Oct 19, 2012 at 1:16 PM, Kumar, Suresh wr...
   Author: Jerry Lam, 2012-10-19, 17:54
Question on Scanner REST API Usage - HBase - [mail # user]
...Hi HBase community:  I have a few questions on the usage of Scanner via REST API:  - From the XML schema ( http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/rest/package-summ...
   Author: Jerry Lam, 2012-10-19, 14:31
Re: Slow scanning for PrefixFilter on EncodedBlocks - HBase - [mail # user]
...Hi ./zahoor:  I don't think it is the same issue. Did you provide the Scan object with the startkey = prefix?  something like: Scan scan = new Scan(prefix);  My understanding ...
   Author: Jerry Lam, 2012-10-15, 17:43
Re: Problem with Rest Java Client - HBase - [mail # user]
...Hi Erman:  I think this post summed up very well about deletion in hbase ( http://hadoop-hbase.blogspot.ca/2011/12/deletion-in-hbase.html) Please have a look.  If you need to delet...
   Author: Jerry Lam, 2012-10-12, 21:45
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