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Re: How to config hbase0.94.2 to retain deleted data - HBase - [mail # user]
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...Lars, No, that is not what I am suggesting. Perhaps I am missing something. Was the OP interested in cells or in row deletes.? Two different issues. On Oct 2...
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Author: Michael Segel,
2012-10-23, 18:40
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Re: How to config hbase0.94.2 to retain deleted data - HBase - [mail # user]
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..."Deleted cells are still subject to TTL and there will never be more than "maximum number of versions" deleted cells. A new "raw" scan options returns all deleted rows and the de...
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Author: Michael Segel,
2012-10-23, 11:41
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Re: How to config hbase0.94.2 to retain deleted data - HBase - [mail # user]
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...keep-deleted-cells feature? Ok... so what exactly does this feature mean? Suppose I have 500 rows within a region. I set this feature to be true. I do a massive delete an...
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Author: Michael Segel,
2012-10-23, 04:18
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Re: How to config hbase0.94.2 to retain deleted data - HBase - [mail # user]
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...Lars, Like the secondary indexes, doing remote updates to other region servers isn't necessarily a bad thing. There are ways to mitigate some of the costs of the up...
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Author: Michael Segel,
2012-10-22, 01:56
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Re: How to config hbase0.94.2 to retain deleted data - HBase - [mail # user]
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...I would suggest that you use your coprocessor to copy the data to a 'backup' table when you mark them for delete. Then as major compaction hits, the rows are deleted from the mai...
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Author: Michael Segel,
2012-10-21, 23:34
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Re: Hbase sequential row merging in MapReduce job - HBase - [mail # user]
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...Outch... That could get very nasty. You may end up with a lot of uneven splits. Suppose your 'metric1' spans 3 regions, 'metric2' 1 but its still in the same ...
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Author: Michael Segel,
2012-10-19, 14:43
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Re: Coprocessor end point vs MapReduce? - HBase - [mail # user]
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...Doug, One thing that concerns me is that a lot of folks are gravitating to Coprocessors and may be using them for the wrong thing. Has anyone done any sort of research as ...
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Author: Michael Segel,
2012-10-18, 18:01
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Re: hbase deployment using VMs for data nodes and SAN for data storage - HBase - [mail # user]
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...Lars, I think we need to clarify what we think of as a SAN. Its possible to have a SAN where the disks appear as attached storage, while the traditional view is that...
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Author: Michael Segel,
2012-10-18, 08:39
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Re: crafting your key - scan vs. get - HBase - [mail # user]
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...Neil, I've pointed you in the right direction. The rest of the exercise is left to the student. :-) While you used the comment about having fun, your question is boring. ...
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Author: Michael Segel,
2012-10-18, 08:23
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Re: Coprocessor end point vs MapReduce? - HBase - [mail # user]
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...Run your weekly job in a low priority fair scheduler/capacity scheduler queue. Maybe its just me, but I look at Coprocessors as a similar structure to RDBMS triggers and s...
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Author: Michael Segel,
2012-10-18, 01:50
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