hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Billy Pearson" <sa...@pearsonwholesale.com>
Subject Re: low performance on hadoop
Date Mon, 10 Nov 2008 21:33:33 GMT
I just added a patch to HBASE-987
https://issues.apache.org/jira/browse/HBASE-987

it has a Partitioner in to to group the records in to a reducer per region
you can set it as the partitioner in the job I am not sure if it will work 
for 0.17

But you can give it a try the file in the patch you are looking for is 
HRegionPartitioner.java

Billy



"Jarod Feng" <jarodf@gmail.com> wrote in 
message news:20376261.post@talk.nabble.com...
>
> Hi ,
> I'm using hbase0.2.1 + hadoop 0.17 with 11 client & 1master servers
> I crawl some data and save them to hbase with map & reduce.
> after that , I try to count the total number of some data.
> it too slow , you can see the monitor , 1 of clients have a high request ,
> but others is 0.
>
> S1:60020 1226025034218 requests: 0 regions: 5
> S2:60020 1226025034364 requests: 0 regions: 5
> S3:60020 1226025033874 requests: 0 regions: 5
> S4:60020 1226025035074 requests: 5085 regions: 4
> S5:60020 1226025034712 requests: 0 regions: 5
> S6:60020 1226025034716 requests: 0 regions: 5
> S7:60020 1226025034280 requests: 0 regions: 4
> S8:60020 1226025034130 requests: 0 regions: 5
> S9:60020 1226025033726 requests: 0 regions: 5
> S10:60020 1226025034539 requests: 0 regions: 5
> S11:60020 1226025034528 requests: 0 regions: 4
>
> I have use hadoop for many month , but this is my first time to develop
> based hbase
>
>
> Thanks,
> -- 
> View this message in context: 
> http://www.nabble.com/low-performance-on-hadoop-tp20376261p20376261.html
> Sent from the HBase User mailing list archive at Nabble.com.
>
> 



Mime
View raw message