I thought FASTDIFF was only for rowkey and columns, great if it also works in value cell.
And thanks for the bjson link! Jianshi On Thu, Nov 13, 2014 at 1:18 PM, Ted Yu <yuzhih...@gmail.com> wrote: > There is FASTDIFF data block encoding. > > See also http://bjson.org/ > > Cheers > > On Nov 12, 2014, at 9:08 PM, Jianshi Huang <jianshi.hu...@gmail.com> > wrote: > > > Hi, > > > > I'm currently saving JSON in pure String format in the value cell and > > depends on HBase' block compression to reduce the overhead of JSON. > > > > I'm wondering if there's a more space efficient way to store JSON? > > (there're lots of 0s and 1s, JSON String actually is an OK format) > > > > I want to keep the value as a Map since the schema of source data might > > change over time. > > > > Also is there a DIFF based encoding for values? Since I'm storing > > historical data (snapshot data) and changes between adjacent value cells > > are relatively small. > > > > > > Thanks, > > -- > > Jianshi Huang > > > > LinkedIn: jianshi > > Twitter: @jshuang > > Github & Blog: http://huangjs.github.com/ > -- Jianshi Huang LinkedIn: jianshi Twitter: @jshuang Github & Blog: http://huangjs.github.com/
