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Re: bulk deletes - HBase - [mail # user]
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...Hi Anoop: In my use case, I use extensively the version delete marker because I need to delete a specific version of a cell (row key, CF, qualifier, timestamp). I have a mapreduce job ...
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Author: Jerry Lam,
2012-10-12, 21:41
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Re: HBase Key Design : Doubt - HBase - [mail # user]
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...correct me if I'm wrong. The version applies to the individual cell (ie. row key, column family and column qualifier) not (row key, column family). On Wed, Oct 10, 2012 at 3:13 PM, Na...
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Author: Jerry Lam,
2012-10-10, 19:24
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Re: key design - HBase - [mail # user]
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...That's true.Then there would be max. 86,400 records per day per userid. That is about 100MB per day. I don't see much difference in both approaches from the storage perspective. On Wed...
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Author: Jerry Lam,
2012-10-10, 19:08
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Re: key design - HBase - [mail # user]
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...Hi: So you are saying you have ~3TB of data stored per day? Using the second approach, all data for one day will go to only 1 regionserver no matter what you do because HBase doe...
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Author: Jerry Lam,
2012-10-10, 16:55
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Re: bulk deletes - HBase - [mail # user]
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...Hi guys: The bulk delete approaches described in this thread are helpful in my case as well. If I understood correctly, Paul's approach is useful for offline bulk deletes (a.k.a. mapre...
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Author: Jerry Lam,
2012-10-10, 15:07
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[HBASE-6757] Very inefficient behaviour of scan using FilterList - HBase - [issue]
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...The behaviour of scan is very inefficient when using with FilterList.The FilterList rewrites the return code from NEXT_ROW to SKIP from a filter if Operator.MUST_PASS_ALL is used. This happe...
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http://issues.apache.org/jira/browse/HBASE-6757
Author: Jerry Lam,
2012-10-05, 01:37
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Re: HBase aggregate query - HBase - [mail # user]
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...Hi Prabhjot: Can you implement this using a counter? That is whenever you insert a row with the month(eventdate) and scene combination, increment the associated counter by one. Note th...
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Author: Jerry Lam,
2012-09-11, 18:48
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Re: Reading in parallel from table's regions in MapReduce - HBase - [mail # user]
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...Hi Loakim: Here a list of links I would suggest you to read (I know it is a lot to read): HBase Related: - http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/TableMapRed...
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Author: Jerry Lam,
2012-09-04, 17:05
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Re: Reading in parallel from table's regions in MapReduce - HBase - [mail # user]
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...Hi Loakim: Sorry, your hypothesis doesn't make sense. I would suggest you to read the "Learning HBase Internals" by Lars Hofhansl at http://www.slideshare.net/cloudera/3-learning-h-bas...
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Author: Jerry Lam,
2012-09-04, 15:59
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Re: setTimeRange and setMaxVersions seem to be inefficient - HBase - [mail # user]
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...Hi Ted: Sure, will do. I also implement the reset method to set previousIncludedQualifier to null for the next row to come. Best Regards, Jerry On Wed, Aug 29, 2012 a...
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Author: Jerry Lam,
2012-08-29, 18:36
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