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) >
