thanks again, i did try making indexes with the MR. dont have exact evaluation data, but inserting indexes directly with mapreduce does seem to be much much faster than making the indexes with the coprocessors. guess i am missing the point about the coprosessors. my reason for trying out the coprocessor was to make the insertion code cleaner and efficient index creation.
Sincerely, Prakash Kadel On Feb 18, 2013, at 10:17 AM, lars hofhansl <[email protected]> wrote: > Index maintenance will always be slower. An interesting comparison would be > to also update your indexes from the M/R and see whether that performs better. > > > > ________________________________ > From: Prakash Kadel <[email protected]> > To: "[email protected]" <[email protected]> > Sent: Sunday, February 17, 2013 5:13 PM > Subject: Re: coprocessor enabled put very slow, help please~~~ > > thank you lars, > That is my guess too. I am confused, isnt that something that cannot be > controlled. Is this approach of creating some kind of index wrong? > > Sincerely, > Prakash Kadel > > On Feb 18, 2013, at 10:07 AM, lars hofhansl <[email protected]> wrote: > >> Presumably the coprocessor issues Puts to another region server in most >> cases, that could explain it being (much) slower. >> >> >> >> ________________________________ >> From: Prakash Kadel <[email protected]> >> To: "[email protected]" <[email protected]> >> Sent: Sunday, February 17, 2013 4:52 PM >> Subject: Re: coprocessor enabled put very slow, help please~~~ >> >> Forgot to mention. I am using 0.92. >> >> Sincerely, >> Prakash >> >> On Feb 18, 2013, at 9:48 AM, Prakash Kadel <[email protected]> wrote: >> >>> hi, >>> i am trying to insert few million documents to hbase with mapreduce. To >>> enable quick search of docs i want to have some indexes, so i tried to use >>> the coprocessors, but they are slowing down my inserts. Arent the >>> coprocessors not supposed to increase the latency? >>> my settings: >>> 3 region servers >>> 60 maps >>> each map inserts to doc table.(checkAndPut) >>> regionobserver coprocessor does a postCheckAndPut and inserts some rows to >>> a index table. >>> >>> >>> Sincerely, >>> Prakash
