RE: vmware & Oracle
- From: "Peter McLarty" <p.mclarty@xxxxxxxxxx>
- To: <QuijadJC@xxxxxxxxxxxxxxx>, "List, Oracle-l Freelists" <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 20 Jul 2007 11:52:26 +1000
There is now bug fixes for time issues with vmware, clocks running away with
themselves.
I have heard from people running VMWare that it performs better where Linux is
the host OS. I am still loathe to recommend it for production environments as
it hasn't scaled all that well in the past,number of users accessing, have seen
slow IO before and the big one is if you have an application that can get
either CPU or IO intensive on its own system how is it to cope with other VM's
sharing those resources on the same physical hardware. An unruly application
somewhere is in the cluster of VM's on that physical host can severly impact
your VM.
I guess whilst it seems to make sense the consolidation idea, it also reduces
redundancy, Assume email, fileserving and accouting database are on a single
physical host, then if that physical host fails I now have three key systems
for my business offline, explain that one to the CEO for a few thousnad dollars
saved in hardware
My 0.02c
Peter
-----Original Message-----
From: QuijadaReina, Julio C [mailto:QuijadJC@xxxxxxxxxxxxxxx]
Sent: Friday, 20 July 2007 10:50 AM
To: Sean.oneill@xxxxxxxxxx; List, Oracle-l Freelists
Subject: RE: vmware & Oracle
Sean,
I used to have a Linux VM as a node on development RAC enviroment. On a regular
basis - about twice a week - the node was evicted, fenced which would panic the
kernel and cause a reboot. I did not dig to deep on the cause - I took the VM
out of the cluster. But as far as I remember the reason was that the guest OS
(RedHat 4) would continually miss the VM host's clock ticks. That really messed
up the time on the guest - making it lag behind up to 3 hours every week. I did
not have this problem with the other 2 physical nodes in the cluster.
Julio
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx on behalf of O'Neill, S. (Sean)
Sent: Thu 7/19/2007 9:18 AM
To: List, Oracle-l Freelists
Subject: vmware & Oracle
Hi Folks,
Has anyone had much experience (good or bad) with running their Oracle DB's on
the "vmware" product from VMware Inc. Speaking to local re-sellers there
appears to be a division of opinon as to whether or not there are performance
hits when doing so. We've a mixed bag of Oracle versions (8.1.7 to 10.1.0.4),
underpinning various applications on our site all running on Windows Server
2000 or 2003. Any feedback, pointers, or links to useful papers would be
appreciated, though I'm really interested in "real life" experiences with the
product.
Regards,
Seán O'Neill,
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