Re: [SPAM] Re: how to develop a custom LoadBalancer for HBase

[LEI Xiaofeng <le...@ihep.ac.cn>]

Thanks for your reply,

So I just need to compile my own LoadBalancer.java? But how can I deploy it to the Master? And how to write the <value> in hbase-site.xml? Is it a absolute path? 



> -----原始邮件-----
> 发件人: "Jean-Marc Spaggiari" <je...@spaggiari.org>
> 发送时间: 2014年4月7日 星期一
> 收件人: user <us...@hbase.apache.org>
> 抄送: 
> 主题: [SPAM] Re: how to develop a custom LoadBalancer for HBase
> 
> Shameless plug:
> http://www.spaggiari.org/index.php/hbase/changing-the-hbase-default-loadbalancer#.U0KTsUU6toc;)
> 
> You don't need to recompile the entire HBase source code. Just your code,
> then deploy it to the Master server and do the config in hbase-site.xml:
>     <property>
>       <name>hbase.master.loadbalancer.class</name>
>       <value>org.spaggiari.hbase.RegionServerPerformanceBalancer</value>
>     </property>
> 
> Feel free to ask more questions if required.
> 
> JM
> 
> 
> 2014-04-07 7:55 GMT-04:00 LEI Xiaofeng <le...@ihep.ac.cn>:
> 
> > Hello,
> >
> > Does anybody know how to develop a custom LoadBalancer for HBase? What is
> > the development process? And how to use my custom LoadBalancer? Do I need
> > to re-compile the whole HBase source code?
> >
> >
> >
> > Thanks,
> > Xiaofeng
> >
> >

Re: [SPAM] Re: how to develop a custom LoadBalancer for HBase

[Jean-Marc Spaggiari <je...@spaggiari.org>]

Hi Lie,

You need to bundle your class in a jar and make sure the jar in the HBase
classpath. For my own cluster I place it in the lib directory. The
hbase-site.xml will only define the classname, not the jar file path.

You will need to restart the master (/bin/rolling-restart.sh --master-only)

JM


2014-04-07 8:24 GMT-04:00 LEI Xiaofeng <le...@ihep.ac.cn>:

> Thanks for your reply,
>
> So I just need to compile my own LoadBalancer.java? But how can I deploy
> it to the Master? And how to write the <value> in hbase-site.xml? Is it a
> absolute path?
>
>
>
> > -----原始邮件-----
> > 发件人: "Jean-Marc Spaggiari" <je...@spaggiari.org>
> > 发送时间: 2014年4月7日 星期一
> > 收件人: user <us...@hbase.apache.org>
> > 抄送:
> > 主题: [SPAM] Re: how to develop a custom LoadBalancer for HBase
> >
> > Shameless plug:
> >
> http://www.spaggiari.org/index.php/hbase/changing-the-hbase-default-loadbalancer#.U0KTsUU6toc
> ;)
> >
> > You don't need to recompile the entire HBase source code. Just your code,
> > then deploy it to the Master server and do the config in hbase-site.xml:
> >     <property>
> >       <name>hbase.master.loadbalancer.class</name>
> >       <value>org.spaggiari.hbase.RegionServerPerformanceBalancer</value>
> >     </property>
> >
> > Feel free to ask more questions if required.
> >
> > JM
> >
> >
> > 2014-04-07 7:55 GMT-04:00 LEI Xiaofeng <le...@ihep.ac.cn>:
> >
> > > Hello,
> > >
> > > Does anybody know how to develop a custom LoadBalancer for HBase? What
> is
> > > the development process? And how to use my custom LoadBalancer? Do I
> need
> > > to re-compile the whole HBase source code?
> > >
> > >
> > >
> > > Thanks,
> > > Xiaofeng
> > >
> > >
>
>