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Re: Map Reduce with multiple scans - HBase - [mail # user]
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...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?...
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Author: Asaf Mesika,
2013-03-01, 14:17
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Re: HBase Thrift inserts bottlenecked somewhere -- but where? - HBase - [mail # user]
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...Maybe you've the limit of the number of RPC Threads handling your write requests per Region Server, thus your requests are queued? On Fri, Mar 1, 2013 at 2:17 PM, Dan Crosta wro...
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Author: Asaf Mesika,
2013-03-01, 14:13
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Re: Row Key Design in time based aplication - HBase - [mail # user]
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...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...
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Author: Asaf Mesika,
2013-02-21, 22:49
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Re: Rowkey design question - HBase - [mail # user]
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...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 ...
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Author: Asaf Mesika,
2013-02-21, 22:15
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...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...
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Author: Asaf Mesika,
2013-02-19, 21:53
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Re: increment counters via bulk upload in HBase - HBase - [mail # user]
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...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...
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Author: Asaf Mesika,
2013-02-18, 22:18
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Re: Using HBase for Deduping - HBase - [mail # user]
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...You can load the events into an Hbase table, which has the event id as the unique row key. You can define max versions of 1 to the column family thus letting Hbase get rid of the duplicates ...
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Author: Asaf Mesika,
2013-02-14, 22:26
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Re: column count guidelines - HBase - [mail # user]
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...Can you elaborate more on that features? I thought 4 was just for bug fixes. Sent from my iPhone On 8 בפבר 2013, at 02:34, Ted Yu wrote: How many column families are ...
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Author: Asaf Mesika,
2013-02-08, 16:25
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Re: Pagination with HBase - getting previous page of data - HBase - [mail # user]
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...Here are my thoughts on this matter: 1. If you define setCaching(numOfRows) on the the scan object, you can check before each call to make sure you haven't passed your page limit, thus...
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Author: Asaf Mesika,
2013-02-03, 14:07
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Re: Getting the scan type at preCompact - HBase - [mail # user]
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...But my scanner is a wrapper to the scanner passed on to me in preCompact. This scanner is created in the Store object (StoreScanner) with arguments I don't have at preCompactScannerOpen(). S...
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Author: Asaf Mesika,
2013-01-29, 18:21
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