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Re: Query a version of a column efficiently - HBase - [mail # user]
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...Hi St.Ack: Let say there are 5 versions for a column A with timestamp = [0, 1, 3, 6, 10]. I want to execute an efficient query that returns one version of the column that has a timesta...
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Author: Jerry Lam,
2012-07-26, 21:40
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Query a version of a column efficiently - HBase - [mail # user]
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...Hi HBase guru: I need some advises on a problem that I'm facing using HBase. How can I efficiently query a version of a column when I don't know exactly the version I'm looking for? Fo...
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Author: Jerry Lam,
2012-07-26, 17:43
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Re: Scanning columns - HBase - [mail # user]
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...Hi, This sounds like you are looking for ColumnRangeFilter? Best Regards, Jerry On Wednesday, July 18, 2012, Mohit Anchlia wrote: ...
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Author: Jerry Lam,
2012-07-18, 19:12
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Re: WAL corruption - HBase - [mail # user]
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...my understanding is that the WAL log is used for replication as well. If all your data has been persisted to disk (i.e. all data in memstores have been flushed to disks) and repl...
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Author: Jerry Lam,
2012-07-02, 17:45
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Re: Recovering corrupt HLog files - HBase - [mail # user]
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...This is interesting because I saw this happens in the past. Is walplayer can be back ported to 0.90.x? Best Regards, Jerry Sent from my iPad On 2012-06-30, at...
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Author: Jerry Lam,
2012-07-01, 01:55
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Re: direct Hfile Read and Writes - HBase - [mail # user]
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...Hi Samar: I have used IncrementalLoadHFile successfully in the past. Basically, once you have written hfile youreself you can use the IncrementalLoadHFile to merge with the HFile curre...
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Author: Jerry Lam,
2012-06-27, 17:22
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Re: HFile Performance - HBase - [mail # user]
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...Hi Elliott: Great! I will look into it ~ Best Regards, Jerry On Thu, Jun 21, 2012 at 6:24 PM, Elliott Clark wrote: ...
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Author: Jerry Lam,
2012-06-25, 18:59
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Re: Hbase Replication - HBase - [mail # user]
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...Hi Mohammad: The current HBase replication (as far as I understand) is designed to replicate data from one data center to another data center. The client application has no knowledge o...
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Author: Jerry Lam,
2012-06-22, 22:03
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HFile Performance - HBase - [mail # user]
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...Hi HBase guru, I would like to benchmark HFile performance without other components in HBase. I know that I can use HFile as any other file format in Hadoop IO. I wonder if there is a ...
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Author: Jerry Lam,
2012-06-21, 22:13
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Re: Isolation level - HBase - [mail # user]
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...Hi Cristina: My understanding of HBase is that the isolation level fro read ops is Read Committed. There is only write lock which could protect the data from modifying by other request...
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Author: Jerry Lam,
2012-06-15, 16:21
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