Some observations based on experience.
Allocating storage based on the controllers helps if
the database is large enough. e.g. 1 controller
manages 100G of physical disk. Use that as a mount
point. This does improve io somewhat if you can have
mount points in 100G multiples (or whatever your
co
l or Injure
Themselves as They See Fit!
-Original Message-
From: Babette Turner-Underwood
[mailto:[EMAIL PROTECTED]]
Sent: 11 November 2002 15:29 PM
To: Multiple recipients of list
ORACLE-L
Subject: RE: Oracle & SAN
Experiences?
A client
site that I was supporting a while ago
: Tuesday, November 12, 2002
8:28 AM
To: Multiple recipients of list
ORACLE-L
Subject: RE: Oracle & SAN
Experiences?
David,
You might find one of my whitepapers
interesting: Sane SAN is the title. You can get it at:
www.scaleabilities.com/whitepapers.shtml
www.oaktable.net
Also,
David,
You might find one of my
whitepapers interesting: Sane SAN is the title. You can get it at:
www.scaleabilities.com/whitepapers.shtml
www.oaktable.net
Also, you will find a paper
on integrating solid state disks into a SAN, and whether that makes any sense
to real sites o
Babette - Sounds like a problem I wrestled with for a long time. Turns out
that RMAN opens quite a few connections and the NAS isn't usually set up for
that many connections. Of course, instead of an error message, it just
hangs.
Dennis Williams
DBA, 40%OCP
Lifetouch, Inc.
[EMAIL PROTECTED]
Title: The Sys
A
client site that I was supporting a while ago had big problems with their
NAS.
While
doing Oracle backups to tape, the application would drop connections.
In a
SAN environment, there might also be similar problems.
-Original Message-From:
[EMAIL PROTECTED] [mail
Guess I wasn't clear with my earlier post. Here is the information from the
SA's when confronted with the results of some I/O tests.
Configuration on system 1 ( poor IO performance ):
Large filesystem --> device driver --> hardware controller --> SAN
switch --> SAN Server
Configuration on syst
ilure in an I/O subsystem costing millions of
dollars...
- Original Message -
From:
Mark
Brooks
To: Multiple recipients of list ORACLE-L
Sent: Saturday, November 09, 2002 12:33
PM
Subject: RE: Oracle & SAN
Experiences?
One observation I have made at sites
Title: The Sys
One
observation I have made at sites running SAN storage for Oracle is a tendency
for the SA's to present the disk to the database server as a small number of
large filesystems. On some OS platforms this can create a bottleneck on the host
as all data to this large filesystem
Tim,
Of course, there are excellent arguments for having test and
development environments on the same SAN.
With SAP for example, wholesale refreshes of the test and dev
environments periodically take place. These are refreshed from
production.
Having these on the same SAN can make a huge
I am off today, recuperating from a SAN failure earlier this week. Here is a
very short take: our Dell SAN went down (backplane failure), taking ALL of
databases along with it. This meant that all servers attached to this SAN
were offline. Upon Dell "repairing" the SAN, data on one volume (mapped t
> The Sys. Admin. team wants to consolidate storage (and
> probably get a new toy too) on all of our servers, so they
> are evaluating a SAN (LSI Logic E4600). The DBA team is
> doing some research to determine the pros and cons of
> doing this, and I'd like to hear any of your experiences
> (goo
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