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Re: HBase Writes With Large Number of Columns - HBase - [mail # user]
...CellBlock == KeyValue?   On Thu, Mar 28, 2013 at 12:06 AM, Ted Yu  wrote:  ...
   Author: Asaf Mesika, 2013-03-27, 22:28
Re: Compaction problem - HBase - [mail # user]
...From my testing: I had 3 RS and 1 Master all connected to a single router at speed of 1000 mbps.  This network measured speed was 107 - 120 MB/sec, while the theoretic max is 125 MB/sec...
   Author: Asaf Mesika, 2013-03-27, 19:55
Re: Why InternalScanner doesn't have a method that returns entire row or object of Result - HBase - [mail # user]
...Guys, Just to make things clear:  if I have a row which have 12 keys values, and then another row with 5 KVs, and I called InternelScanner(results, 10), where 10 is the limit, then I wo...
   Author: Asaf Mesika, 2013-03-07, 12:34
Re: Rowkey design and presplit table - HBase - [mail # user]
...I would convert each id to long and then use Bytes.toBytes to convert this long to a byte array. If it is an int then even better. Now, write all 3 longs one after another to one array which...
   Author: Asaf Mesika, 2013-03-07, 07:42
Re: HBase Thrift inserts bottlenecked somewhere -- but where? - HBase - [mail # user]
...Make sure you are not sending a lot of put of the same rowkey. This can cause contention in the region server side. We fixed that in our project by aggregating all the columns for the same r...
   Author: Asaf Mesika, 2013-03-02, 19:56
Re: Map Reduce with multiple scans - HBase - [mail # user]
...Nick, if he didn't specify startKey, endKey in the Scan Object, and delegate it to a Filter, this means he will send this scan to *all* regions in the system, instead of just one or two, no?...
   Author: Asaf Mesika, 2013-03-01, 14:17
Re: Row Key Design in time based aplication - HBase - [mail # user]
...How does avoid memory hogging the region server when multiple queries with group by are executed, which is done in Hbase jvm. I know that Hbase does not handle well when heap space is set be...
   Author: Asaf Mesika, 2013-02-21, 22:49
Re: Rowkey design question - HBase - [mail # user]
...An easier way is to place one byte before the time stamp which is called a bucket. You can calculate it by using modulu on the time stamp by the number of buckets. We are now in the process ...
   Author: Asaf Mesika, 2013-02-21, 22:15
Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
...1. Try batching your increment calls to a List and use batch() to execute it. Should reduce RPC calls by 2 magnitudes. 2. Combine batching with scanning more words, thus aggregating your cou...
   Author: Asaf Mesika, 2013-02-19, 21:53
Re: increment counters via bulk upload in HBase - HBase - [mail # user]
...We solved this partially by converting increment to put and aggregating in preCompact. I guess that if you bulk upload an HFile which has this puts which are a representation of a delta to a...
   Author: Asaf Mesika, 2013-02-18, 22:18
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