hi,anoop. Why not hbase mapreduce package contains the tools like this? Anoop John <[email protected]>编写：
>Hi > Can you think of using HFileOutputFormat ? Here you use >TableOutputFormat now. There will be put calls to HTable. Instead in >HFileOutput format the MR will write the HFiles directly.[No flushes , >compactions] Later using LoadIncrementalHFiles need to load the HFiles to >the regions. May help you.. > >-Anoop- > >On Sun, Jan 13, 2013 at 10:59 AM, Farrokh Shahriari < >[email protected]> wrote: > >> Thank you guys,let me change these configuration & test mapreduce again. >> >> On Tue, Jan 8, 2013 at 10:31 PM, Asaf Mesika <[email protected]> >> wrote: >> >> > Start by testing HDFS throughput by doing s simple copyFromLocal using >> > Hadoop command line shell (bin/hadoop fs -copyFromLocal pathTo8GBFile >> > /tmp/dummyFile1). If you have 1000Mbit/sec network between the computers, >> > you should get around 75 MB/sec. >> > >> > On Tuesday, January 8, 2013, Bing Jiang wrote: >> > >> > > In our experience, it can enhance mapreduce insert by >> > > 1.add regionserver flush thread number >> > > 2.add memstore/jvm_heap >> > > 3.pre split table region before mapreduce >> > > 4.add large and small compaction thread number. >> > > >> > > please correct me if wrong, or any other better ideas. >> > > On Jan 8, 2013 4:02 PM, "lars hofhansl" <[email protected] >> <javascript:;>> >> > > wrote: >> > > >> > > > What type of disks and how many? >> > > > With the default replication factor your 2 (or 6) GB are actually >> > > > replicated 3 times. >> > > > 6GB/80s = 75MB/s, twice that if you do not disable the WAL, which a >> > > > reasonable machine should be able to absorb. >> > > > The fact that deferred log flush does not help you seems to indicate >> > that >> > > > you're over IO bound. >> > > > >> > > > >> > > > What's your memstore flush size? Potentially the data is written many >> > > > times during compactions. >> > > > >> > > > >> > > > In your case you dial down the HDFS replication, since you only have >> > two >> > > > physical machines anyway. >> > > > (Set it to 2. If you do not specify any failure zones, you might as >> > well >> > > > set it to 1... You will lose data if one of your server machines dies >> > > > anyway). >> > > > >> > > > It does not really make that much sense to deploy HBase and HDFS on >> > > > virtual nodes like this. >> > > > -- Lars >> > > > >> > > > >> > > > >> > > > ________________________________ >> > > > From: Farrokh Shahriari <[email protected] >> <javascript:;>> >> > > > To: [email protected] <javascript:;> >> > > > Sent: Monday, January 7, 2013 9:38 PM >> > > > Subject: Re: Tune MapReduce over HBase to insert data >> > > > >> > > > Hi again, >> > > > I'm using HBase 0.92.1-cdh4.0.0. >> > > > I have two server machine with 48Gb RAM,12 physical core & 24 logical >> > > core >> > > > that contain 12 nodes(6 nodes on each server). Each node has 8Gb RAM >> & >> > 2 >> > > > VCPU. >> > > > I've set some parameter that get better result like set WAL=off on >> > > put,but >> > > > some parameters like Heap-size,Deferred log flush don't help me. >> > > > Beside that I have another question,why each time I've run >> > mapreduce,I've >> > > > got different result time while all the config & hardware are same & >> > not >> > > > change ? >> > > > >> > > > Tnx you guys >> > > > >> > > > On Tue, Jan 8, 2013 at 8:42 AM, Ted Yu <[email protected] >> > <javascript:;>> >> > > wrote: >> > > > >> > > > > Have you read through >> http://hbase.apache.org/book.html#performance? >> > > > > >> > > > > What version of HBase are you using ? >> > > > > >> > > > > Cheers >> > > > > >> > > > > On Mon, Jan 7, 2013 at 9:05 PM, Farrokh Shahriari < >> > > > > [email protected] <javascript:;>> wrote: >> > > > > >> > > > > > Hi there >> > > > > > I have a cluster with 12 nodes that each of them has 2 core of >> CPU. >> > > > Now,I >> > > > > > want insert large data about 2Gb in 80 sec ( or 6Gb in 240sec ). >> > I've >> > > > > used >> > > > > > Map-Reduce over hbase,but I can't achieve proper result . >> > > > > > I'd be glad if you tell me what I can do to get better result or >> > > which >> > > > > > parameters should I config or tune to improve Map-Reduce/Hbase >> > > > > performance >> > > > > > ? >> > > > > > >> > > > > > Tnx >> > > > > > >> > > > > >> > > >> > >>
