Re: Exadata CPU Upgrade
From: Karl Arao <karlarao_at_gmail.com>
Date: Wed, 5 Sep 2012 15:15:04 -0500
Message-ID: <CACNsJndEjFqF-Pd=L8dm-03Q=aMMtd_2ohAw2hThv6DHruVtAg_at_mail.gmail.com>
If you check out the evernote link on this wiki http://goo.gl/M8mVW I'm also making use of logical cores from the source systems. So even if I make use of 12cores/node (real cores) as long as I'm using the same real cores number on the source I should be able to arrive at the same number. On that link the first example is an M900.. if we make this as 128 we will still arrive at the same number if we divide this by 12 and not by 24 (Exadata).
Date: Wed, 5 Sep 2012 15:15:04 -0500
Message-ID: <CACNsJndEjFqF-Pd=L8dm-03Q=aMMtd_2ohAw2hThv6DHruVtAg_at_mail.gmail.com>
If you check out the evernote link on this wiki http://goo.gl/M8mVW I'm also making use of logical cores from the source systems. So even if I make use of 12cores/node (real cores) as long as I'm using the same real cores number on the source I should be able to arrive at the same number. On that link the first example is an M900.. if we make this as 128 we will still arrive at the same number if we divide this by 12 and not by 24 (Exadata).
Exadata est cores requirement = source host cores * chip efficiency factor * utilization
- 128 * 0.46 * 0.8
- 47.104 cores
Then divide this by the number of cores of Exadata to get the number of compute nodes
- 47.104 /12
- 3.925333333333333 nodes
-- Karl Arao karlarao.wordpress.com karlarao.tiddlyspot.com twitter.com/karlarao -- http://www.freelists.org/webpage/oracle-lReceived on Wed Sep 05 2012 - 15:15:04 CDT