[ale] fiber channel mounts

[Jeff Lightner]

You could get OCFS2 (open source) from Oracle's web site.  It's designed
to allow you to use the same storage in a clustered configuration.  We
use its predecessor OCFS for one of our old Oracle RAC environments but
RAC isn't required as OCFS2 handles its own clustering setup.  Its also
reportedly a much improved product over OCFS(1).   It uses Linux'
O_DIRECT stuff for the file sharing so the tools you use have to be
O_DIRECT aware and I think most of the newer ones (tar, ls, cp, mv
etc...) are.   When we did it back on RHEL3 (2.4 kernel) we had to load
the utilities Oracle had made that were (also open source).

 

Also GFS I believe is designed for similar usage and is native to most
distros but I haven't used it.

 

________________________________

From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Jim
Kinney
Sent: Monday, December 07, 2009 11:33 AM
To: Atlanta Linux Enthusiasts - Yes! We run Linux!
Subject: [ale] fiber channel mounts

 

I have a netapp joined by fiber channel to 2 linux head end servers. I'm
using multipath fiber channel in an active/active mode for maximum data
throughput.

box 1 can write a file and read that file is there. Box 2 can't see the
file exists. 
box 2 can write file and see it on the netapp but box one does not see
it.

run sync on both boxes and umount/mount the netapp storage space again.
both box 1 & 2 see the file written from box 1 but the file written from
box 2 is gone.

this is bad. Clearly I have a misconfiguration somewhere! Box 2 shows
errors related to ext3 journal corruption so ext3 is NOT a good choice.

Box 2 is supposed to be a failover database and the netapp is the
storage for the database files. I would prefer for the failover to be
closer to a hot standby than a cold standby but it looks like I can't
keep the netapp partition mounted on box 2 if box 1 is still live. I'm
not running the database at all on box 2.

-- 
-- 
James P. Kinney III
Actively in pursuit of Life, Liberty and Happiness
 
Proud partner. Susan G. Komen for the Cure.
 
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