You can read this JIra issue for this too: https://issues.apache.org/jira/browse/HBASE-4218
2013/4/3 Marcos Luis Ortiz Valmaseda <[email protected]> > Regards, Jean-Marc. > The best resource that I found for this is a great blog post called Apache > HBase I/O - HFile from Matteo Bertozzi in Cloudera´s blog. Here´s the link: > http://blog.cloudera.com/blog/2012/06/hbase-io-hfile-input-output/ > > > > > 2013/4/3 Jean-Marc Spaggiari <[email protected]> > >> Is there any documentation anywhere regarding the differences between >> PREFIX, DIFF and FAST_DIFF? >> >> 2013/4/3 prakash kadel <[email protected]>: >> > thank you very much. >> > i will try with snappy compression with data_block_encoding >> > >> > >> > >> > >> > On Wed, Apr 3, 2013 at 11:21 PM, Kevin O'dell <[email protected] >> >wrote: >> > >> >> Prakash, >> >> >> >> Yes, I would recommend Snappy Compression. >> >> >> >> On Wed, Apr 3, 2013 at 10:18 AM, Prakash Kadel < >> [email protected]> >> >> wrote: >> >> > Thanks, >> >> > is there any specific compression that is recommended of the use >> >> case i have? >> >> > Since my values are all null will compression help? >> >> > >> >> > I am thinking of using prefix data_block_encoding.. >> >> > Sincerely, >> >> > Prakash Kadel >> >> > >> >> > >> >> > On Apr 3, 2013, at 10:55 PM, Ted Yu wrote: >> >> > >> >> >> You should use data block encoding (in 0.94.x releases only). It is >> >> helpful >> >> >> for reads. >> >> >> >> >> >> You can also enable compression. >> >> >> >> >> >> Cheers >> >> >> >> >> >> >> >> >> On Wed, Apr 3, 2013 at 6:42 AM, Prakash Kadel < >> [email protected] >> >> >wrote: >> >> >> >> >> >>> Hello, >> >> >>> I have a question. >> >> >>> I have a table where i store data in the column qualifiers(the >> >> values >> >> >>> itself are null). >> >> >>> I just have 1 column family. >> >> >>> The number of columns per row is variable (1~ few thousands) >> >> >>> >> >> >>> Currently i don't use compression or the data_block_encoding. >> >> >>> >> >> >>> Should i? >> >> >>> I want to have faster reads. >> >> >>> >> >> >>> Please suggest. >> >> >>> >> >> >>> >> >> >>> Sincerely, >> >> >>> Prakash Kadel >> >> > >> >> >> >> >> >> >> >> -- >> >> Kevin O'Dell >> >> Systems Engineer, Cloudera >> >> >> > > > > -- > Marcos Ortiz Valmaseda, > *Data-Driven Product Manager* at PDVSA > *Blog*: http://dataddict.wordpress.com/ > *LinkedIn: *http://www.linkedin.com/in/marcosluis2186 > *Twitter*: @marcosluis2186 <http://twitter.com/marcosluis2186> > -- Marcos Ortiz Valmaseda, *Data-Driven Product Manager* at PDVSA *Blog*: http://dataddict.wordpress.com/ *LinkedIn: *http://www.linkedin.com/in/marcosluis2186 *Twitter*: @marcosluis2186 <http://twitter.com/marcosluis2186>
