Re: Test NAS response
- From: Austin Hackett <hacketta_57@xxxxxx>
- To: oracle-l digest users <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 10 Sep 2013 20:59:41 +0100
Hi Malcolm
I've recently built and gone into production with a 5-node 11.2 RAC using a
NetApp 6290 (with Flash Cache and Flash Pool) and Direct NFS. Before going
live, I spent quite a lot of time I/O testing using SLOB2.
Frits already posted the URL for SLOB2. There is also a nice blog post and test
harness from Flash DBA at
http://flashdba.com/database/useful-scripts/using-slob2-for-pio-testing/ to
help you get started.
I tried Oracle's ORION tool with NFS about a year ago, but it didn't seem to
work properly for me. I think I may have been hitting a bug where you get poor
async I/O performance with Orion and NFS.
NetApp provide a tool called FIO. Whilst this is easy to run, it doesn't
necessarily make the same I/O system calls as Oracle does (I've never done an
strafe to of fio to find out)
Are you going to be using 1 GbE or 10 GbE NICs for storage connectivity? During
my tests I couldn't use the full bandwidth of 10 GbE NICs I was using with
kernel NFS. However, with Direct NFS I was happily getting > 1000 MB/sec. If
you are going to use Direct NFS then be sure to read My Oracle Support
"Recommended Patches for Direct NFS Client (Doc ID 1495104.1)". I hit at least
a couple of these bugs during my tests, and was able to resolve them with the
patches. You might need to request back ports of the patches depending on your
PSU level and platform. I did.
Hope that helps
Austin--
//www.freelists.org/webpage/oracle-l
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