Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> Linux kernel recommendations for HBase 0.94.2


Copy link to this message
-
Re: Linux kernel recommendations for HBase 0.94.2
I think the newer kernels in the last several years contain mostly new
features/drivers rather than optimizations. Plus JVM puts another
abstraction between the application and the kernel which makes which makes
any kernel specific consideations in terms of HBase much less sensible.
I don't think you will see any different between 3.8 and 3.2.

Unfortunatelly I'm not a kernel tuning guy. It's a nice idea to tune the
kernel for an application, and you may gain some performance in some cases,
but in my opinion it's unlikely that you get e.g. more than a couple
percentage of performance gain overall. Good performance comes from good
program. If you wish to tune, probably go for I/O specific settings. What I
can recommend  however is to recompile the kernel for your CPU, that way
some CPU specific instructions can bring some performance.
On Tue, Apr 2, 2013 at 8:34 PM, Michael Ellery <[EMAIL PROTECTED]> wrote:

> We are currently building a cluster based on CDH4.2 (HBase 0.94.2). We are
> trying to decide whether to use a 3.8 kernel or stick with our current 3.2
> kernel. Does anyone have operational experience with either kernel version
> and HBase that indicates to a version preference? Are there specific
> recommended kernel tuning params in either kernel version that we should
> consider?
>
> Any advice appreciated.
>
> -Mike Ellery
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB