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Re: DoubleColumnInterpretor for my coprocessor - HBase - [mail # user]
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...After some dig up. it was some goof up with the jar file i loaded.. It works in both the case flawlessly now. ./Zahoor On 26-Sep-2012, at 3:35 PM, Julian Wissmann wrote: &n...
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Author: J Mohamed Zahoor,
2012-10-02, 06:12
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Re: HBASE garbage collection problem - HBase - [mail # user]
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...Ignore the permgen advice. Thought promotion failure as permgen failure. ./zahoor On 12-Sep-2012, at 8:39 PM, "Amlan Roy" wrote: ...
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Author: J Mohamed Zahoor,
2012-09-12, 15:21
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Re: HBASE garbage collection problem - HBase - [mail # user]
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...Try with lesser than 70% occupancy in CMS… for perm failure try increasing the permgen size. Another option is to try DoubleBuffer. ./zahoor On 12-Sep-2012, at 8:39 PM, "A...
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Author: J Mohamed Zahoor,
2012-09-12, 15:18
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Getting rid of -ROOT- Region - HBase - [mail # dev]
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...Hi I see that there were some discussions (HBASE-4524) in the past on getting rid of ROOT and storing the location of META on zk. People seem to agree on the topic also... is there any...
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Author: J Mohamed Zahoor,
2012-08-28, 05:25
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Getting rid of -ROOT- - HBase - [mail # dev]
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...Hi I see that there were some discussions (HBASE-4524) in the past on getting rid of ROOT and storing the location of META on zk. People seem to agree on the topic also... is there any...
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Author: J Mohamed Zahoor,
2012-08-28, 05:23
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Re: Using timestamps as "transaction ids" for idempotent counters. - HBase - [mail # user]
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...Hi One of the supported data type in HBase is "Counters". HTable already has a method called "incrementColumnValue", which atomically increments a column value. The lock is acquired at...
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Author: J Mohamed Zahoor,
2012-08-25, 16:45
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Re: How to avoid stop-the-world GC for HBase Region Server under big heap size - HBase - [mail # user]
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...Slab cache might help http://www.cloudera.com/blog/2012/01/caching-in-hbase-slabcache/ ./zahoor On Thu, Aug 23, 2012 at 11:36 AM, Gen Liu wrote: ...
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Author: J Mohamed Zahoor,
2012-08-23, 06:16
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Re: Using HBase serving to replace memcached - HBase - [mail # user]
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...If you need to search row and column qualifiers you can pick row+ col bloom to help you skip blocks. ./Zahoor@iPad On 22-Aug-2012, at 10:58 PM, "Pamecha, Abhishek" &n...
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Author: J Mohamed Zahoor,
2012-08-23, 04:04
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Re: Slow full-table scans - HBase - [mail # user]
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...Try a quick TestDFSIO to see if things are okay. ./zahoor On Wed, Aug 22, 2012 at 6:26 AM, Mohit Anchlia wrote: ...
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Author: J Mohamed Zahoor,
2012-08-22, 05:00
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Re: Using HBase serving to replace memcached - HBase - [mail # user]
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...Hmm... It is a multilevel index. Only the root Index's (Data, Meta etc) are loaded when a region is opened. The rest of the tree (intermediate and leaf index's) are present in each block lev...
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Author: J Mohamed Zahoor,
2012-08-22, 04:51
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