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Re: Key Design Question for list data - HBase - [mail # user]
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...Great summary! The one other thing I would also note is that your consistency requirements need to be considered. If you want to make atomic list changes you'll need to go wide....
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Author: Jacques,
2012-04-04, 16:46
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Re: Rows vs. Columns - HBase - [mail # user]
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...As the advice says... Millions of colums are not a good idea. If your user information will be sparse eg only a few hundred users will associate with a particular row you'll be ...
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Author: Jacques,
2012-03-20, 06:08
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Re: What about storing binary data(e.g. images) in HBase? - HBase - [mail # user]
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...Namenode is limited on the number of blocks. Whether you changed the block size or not would not have much impact on the problem. I think that the limit is something like 150 mil...
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Author: Jacques,
2012-03-05, 16:49
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Re: What about storing binary data(e.g. images) in HBase? - HBase - [mail # user]
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...information where file is placed You're likely to run out of space due to the name node's file count limit if you went with this solution straight. If you follow this path, you p...
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Author: Jacques,
2012-03-05, 01:29
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Re: multiple puts in reducer? - HBase - [mail # user]
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...The data flow is what matters. The reduce phase is about sorting output. If you push puts to HBase, the input to HBase doesn't have to be sorted since HBase does a sort no matter...
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Author: Jacques,
2012-03-01, 17:28
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Re: Set num of mappers in a TableMapReduceUtil.initTableMapperJob - HBase - [mail # user]
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...The short answer is that it picks the mappers count is the locked to the number of regions for the table you're working against using that inputformat since this is most efficient. You...
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Author: Jacques,
2012-03-01, 17:20
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Re: multiple puts in reducer? - HBase - [mail # user]
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...I see nothing wrong with using the output of the reducer into hbase. You just need to make sure duplicated operations wouldn't cause problems. If using tableoutputformat, don't ...
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Author: Jacques,
2012-02-29, 05:16
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Re: multiple puts in reducer? - HBase - [mail # user]
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...Let me append this. Having just looked at the code for TableOutputFormat, I must correct myself. TableOutputFormat does a direct commit so it falls under case 2. So the onl...
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Author: Jacques,
2012-02-28, 16:21
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Re: multiple puts in reducer? - HBase - [mail # user]
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...The key is that there are two output commit strategies for a map reduce job. Those that follow the map reduce paradigm and those that work outside of it. Option 1: Rely on map-re...
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Author: Jacques,
2012-02-28, 16:15
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Re: Corresponding table in Hbase - HBase - [mail # user]
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...I'll be... didn't even know that existed in the HBase code base On Wed, Feb 22, 2012 at 9:25 AM, Stack wrote: ...
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Author: Jacques,
2012-02-22, 18:17
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