HBase Serve the purpose if you use the HDFS underlying hbase, as it will distribute, and also you can write hbase mapreduce code additional to the hbase APIs. Please check following links for hbase mapreduce coding...
http://hbase.apache.org/book/mapreduce.example.html http://hbase.apache.org/book/ops_mgt.html http://hbase.apache.org/book/mapreduce.html *Thanks & Regards * ∞ Shashwat Shriparv On Sun, Apr 21, 2013 at 10:47 PM, Ted Yu <yuzhih...@gmail.com> wrote: > HBase relies on hdfs features heavily. > HBase also supports running Map Reduce Jobs. > > You can find examples in these places (0.94 codebase): > > ./security/src/test/java/org/apache/hadoop/hbase/mapreduce > ./src/examples/mapreduce/org/apache/hadoop/hbase/mapreduce > ./src/main/java/org/apache/hadoop/hbase/mapreduce > ./src/main/resources/org/apache/hadoop/hbase/mapreduce > ./src/test/java/org/apache/hadoop/hbase/mapreduce > > On Sun, Apr 21, 2013 at 12:53 AM, Rami Mankevich <ra...@amdocs.com> wrote: > > > I have additional question: > > Hbase is built on top of hadoop. > > Does HBases uses HDFS only of hadoop or uses Map Reduce Jobs engine as > > well? > > Thanks a lot! > > > > > > From: Rami Mankevich > > Sent: Tuesday, April 09, 2013 8:52 PM > > To: 'user@hbase.apache.org' > > Cc: 'Andrew Purtell' > > Subject: RE: Hbase question > > > > First of all - thanks for the quick response. > > > > Basically threads I want to open are for my own internal structure > > updates and I guess have no relations to HBase internal structures. > > All I want is initiations for some asynchronous structure updates as part > > of coprocessor execution in order not to block user reponse. > > > > The only reason I was asking is to be sure Hbase will not kill those > > threads. > > As I understand - shouldn't be any issue with that. Am I correct? > > > > In addition - Is there any Hbase Thread pool I can use? > > > > > > Thanks > > From: Andrew Purtell [mailto:apurt...@apache.org]<mailto:[mailto: > > apurt...@apache.org]> > > Sent: Tuesday, April 09, 2013 6:53 PM > > To: Rami Mankevich > > Cc: apurt...@apache.org<mailto:apurt...@apache.org> > > Subject: Re: Hbase question > > > > Hi Rami, > > > > It is no problem to create threads in a coprocessor as a generic answer. > > More specifically there could be issues depending on exactly what you > want > > to do, since coprocessor code changes HBase internals. Perhaps you could > > say a bit more. I also encourage you to ask this question on > > user@hbase.apache.org<mailto:user@hbase.apache.org> so other > contributors > > can chime in too. > > > > On Tuesday, April 9, 2013, Rami Mankevich wrote: > > Hey > > According to the Hbase documentation you are one of contrinuters to the > > HBase project > > I would like to raise some question when nobody can basically advice me: > > > > In context of coprocessors I want to raise some threads. > > Do you see any problems with that? > > > > Thanks > > This message and the information contained herein is proprietary and > > confidential and subject to the Amdocs policy statement, you may review > at > > http://www.amdocs.com/email_disclaimer.asp > > > > > > -- > > Best regards, > > > > - Andy > > > > Problems worthy of attack prove their worth by hitting back. - Piet Hein > > (via Tom White) > > >
