UltraSparc IV versus UltraSparc T2
Hi All, I have been given a choice of either: SUN V490 with 2 dual core UltraSparc IV processors OR SUN T5220 with a single 4 core UltraSparc T2 processor I am running IDS 9.4.xc4 and am uncertain whether IDS will make full benefit of all 4 cores and threads of the T2. Or would it be more optimal on a greater number of physical processors. At the moment I am leaning towards the older V490 due to number of physical processors but this is very much out of ignorance. Can anyone shed any light on this? Thanks In advance, Conrad.
Not knowing the full details, it seems most of the "dual-core" or "quad-core" processors (at least from Intel) use shared caches on the chip. Therefore, you could ASSume that - if the processors were the same clock speed - the separate processors with their own cache could be faster, especially if 'AFFINITY' and 'noage' is being used in $ONCONFIG. Only a comparison test could tell for sure. Bob Roussey Unix / Informix Administration Spirit Airlines Robert.Roussey@SpiritAir.com -----Original Message----- From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of CONRAD DUTTON Sent: Thursday, January 31, 2008 12:39 PM To: ids@iiug.org Subject: UltraSparc IV versus UltraSparc T2 [11116] Hi All, I have been given a choice of either: SUN V490 with 2 dual core UltraSparc IV processors OR SUN T5220 with a single 4 core UltraSparc T2 processor I am running IDS 9.4.xc4 and am uncertain whether IDS will make full benefit of all 4 cores and threads of the T2. Or would it be more optimal on a greater number of physical processors. At the moment I am leaning towards the older V490 due to number of physical processors but this is very much out of ignorance. Can anyone shed any light on this? Thanks In advance, Conrad. ************************************************************************ ******* Forum Note: Use "Reply" to post a response in the discussion forum. See you at the IIUG Informix 2008 Conference The Power Conference for Informix Professionals April 27 - 30, 2008 Marriott Overland Park (Kansas City), Kansas http://www.iiug.org/conf Registration Now Open!!
Hi Conrad, Check out the http://www.sun.com pages for longer descriptions, but in brief below. CONRAD DUTTON wrote: > Hi All, > > I have been given a choice of either: > > SUN V490 with 2 dual core UltraSparc IV processors > This will present to you as 4 x CPU's, so I guess you'll configure IDS with 3 CPUVP's > OR > SUN T5220 with a single 4 core UltraSparc T2 processor > This uses Chip Multi-Threading CMT, so will present as 4 cores times 8 Threads, so will equate to 32 CPU's, so in IDS I guess you could configure as 31 CPUVP's. I think you need to consider the type of work load, ie OLTP, short sharp transactions will perform well on the T5220, but longer reporting type transaction won't work well on the T5220 because the single CPU's speed is 1.4GHz, so the general rule is if you have larger percentage of DS queries as opposed to OLTP work, head to towards faster speed CPU's, the V490 will likely be 2Ghz and there are effectively 4 of them. Are these new machines, if yes ask Sun about the try-before-you-buy program and try the T5220, if it's not good give it back and take a V490. Have fun. Andy > I am running IDS 9.4.xc4 and am uncertain whether IDS will make full benefit > of all 4 cores and threads of the T2. Or would it be more optimal on a greater > number of physical processors. > > At the moment I am leaning towards the older V490 due to number of physical > processors but this is very much out of ignorance. > > Can anyone shed any light on this? > > Thanks In advance, > Conrad. > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > See you at the IIUG Informix 2008 Conference > The Power Conference for Informix Professionals > April 27 - 30, 2008 Marriott Overland Park (Kansas City), Kansas > http://www.iiug.org/conf > Registration Now Open!! > -- ================================================== Title : SAP Technical Design Consultant Tel : +44 (0)161 905 8112 Fax : +44 (0)870 1617421 Mobile : +44 (0)7711 639937 Car : +44 (0)7770 630428 Business Email : andrew.dibbins@sun.com Sms/Pager : andrew.dibbins@sun.itechtool.com ================================================== This message including any attachments is confidential information of Sun Microsystems, Inc. Disclosure, copying or distribution is prohibited without permission of Sun. If you are not the intended recipient, please reply to the sender and then delete this message