RE: vmware & Oracle

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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