RE: Disk IO 100% busy - SAN issue?
- From: <Christopher.Taylor2@xxxxxxxxxxxx>
- To: <mdinh235@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 15 Nov 2012 07:39:10 -0600
Michael,
We probably need the storage type.
For example we have a similar issue with AIX going to a new EMC VMAX 20K.
The monitoring for that is very hard because it uses hdiskpower adapters
between the host and the storage - so the "disks" only show up through the
hdiskpower IO adapters on fscsi 1,2,3, and 4 (4 io adapters).
The "disks" (hdisk01, hdisk02, hdisk03) in this case are really luns of
many,many devices at EMC layer and the EMC layer uses Fast Virtual Provisioning
from SATA (lower tier) to Fiber (middle tier) to SSD (upper tier).
So it would be good to provide an update:
- Number of IO adapters and type
- LUNs present at the host
- LUN configuration at the storage
- Fast VP enabled or no? Is all storage the same? SSDs, SATA or what?
- Storage Vendor and Make/Model
Just off the top of my head here.
Chris
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Michael Dinh
Sent: Thursday, November 15, 2012 7:28 AM
To: oracle-l
Subject: Disk IO 100% busy - SAN issue?
Hello,
I would appreciate any feedback from storage experts on my post
http://mdinh.wordpress.com/2012/11/15/san-insanity/ SAN Insanity.
Thanks Michael.
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