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Re: Column Qualifier space requirements - HBase - [mail # user]
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...Hi there, there is a separate Store per ColumnFamily, which results in a separate StoreFile. http://hbase.apache.org/book.html#regions.arch This section has a description of wha...
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Author: Doug Meil,
2012-10-03, 14:59
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Re: HBase table row key design question. - HBase - [mail # user]
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...Hi there, while this isn't an answer to some of the specific design questions, this chapter in the RefGuide can be helpful for general design.. http://hbase.apache.org/book.html#schema...
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Author: Doug Meil,
2012-10-02, 20:02
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Re: HBase vs. HDFS - HBase - [mail # user]
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...If you take Hbase out of it and think of it from the standpoint of 2 programs, one of which opens a file and write the output to another file, and the other one which actually processes each...
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Author: Doug Meil,
2012-10-02, 14:04
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Re: HBase vs. HDFS - HBase - [mail # user]
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...Hi there, Another thing to consider on top of the scan-caching is that that HBase is doing more in the process of scanning the table. See... http://hbase.apache.org/book.h...
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Author: Doug Meil,
2012-10-02, 12:28
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Re: HBase vs. HDFS - HBase - [mail # user]
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...Hi there- Might want to start with thisŠ http://hbase.apache.org/book.html#perf.reading Š if you're using default scan caching (which is 1) that would explain a lot. ...
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Author: Doug Meil,
2012-10-02, 00:54
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[HBASE-3737] HTable - delete(List<Delete>) doesn't use writebuffer - HBase - [issue]
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...I just realized that htable.delete(List<Delete>) doesn't use the writebuffer and processes the list immediately, but htable.put(List<Put>) does use the writebuffer (i.e., send wh...
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http://issues.apache.org/jira/browse/HBASE-3737
Author: Doug Meil,
2012-09-27, 23:16
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Re: Hbase Scan - number of columns make the query performance way different - HBase - [mail # user]
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...Hi there, I don't know the specifics of your environment, but ... http://hbase.apache.org/book.html#perf.reading 11.8.2. Scan Attribute Selection Š describes paying attention to...
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Author: Doug Meil,
2012-09-13, 14:29
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Re: No of rows - HBase - [mail # user]
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...Hi there, If you're talking about stopping a scan after X rows (as opposed to the batching), but break out of the ResultScanner loop after X rows. http://hbase.apache.org/book.ht...
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Author: Doug Meil,
2012-09-12, 22:59
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Re: java.io.IOException: Pass a Delete or a Put - HBase - [mail # user]
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...Did you compare your example to this... http://hbase.apache.org/book.html#mapreduce.example 7.2.2. HBase MapReduce Read/Write Example ? On 9/12/12 1:02 PM, "Jothik...
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Author: Doug Meil,
2012-09-12, 18:05
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Re: Optimizing table scans - HBase - [mail # user]
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...Hi there, See this for info on the block cache in the RegionServer.. http://hbase.apache.org/book.html 9.6.4. Block Cache Š and see this for "batching" on the scan paramet...
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Author: Doug Meil,
2012-09-12, 14:37
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