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From lars hofhansl <la...@apache.org>
Subject Re: RE: Add Columnsize Filter for Scan Operation
Date Fri, 25 Oct 2013 05:00:06 GMT
We need to finish up HBASE-8369

 From: Dhaval Shah <prince_mithibai@yahoo.co.in>
To: "user@hbase.apache.org" <user@hbase.apache.org> 
Sent: Thursday, October 24, 2013 4:38 PM
Subject: Re: RE: Add Columnsize Filter for Scan Operation

Well that depends on your use case ;)

There are many nuances/code complexities to keep in mind:
- merging results of various HFiles (each region can have.more than one)
- merging results of WAL
- applying delete markers
- how about data which is only in memory of region servers and no where else
- applying bloom filters for efficiency
- what about hbase filters?

At some point you would basically start rewriting an hbase region server on you map reduce
job which is not ideal for maintainability. 

Do we ever read MySQL data files directly or issue a SQL query? Kind of goes back to the same
argument ;)

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