And power, cooling, floorspace, etc. Lee Stewart ● VM System Support ● Visa ● Phone: 6(750)4601 - +1-303-389-4601 ● [email protected]
> -----Original Message----- > From: Linux on 390 Port [mailto:[email protected]] On Behalf Of > Harder, Pieter > Sent: Wednesday, February 03, 2016 3:39 AM > To: [email protected] > Subject: Re: TCO comparison Intel vs EC12 IFLs > > Quite right. You have to consider the whole stack, from storage/networking > to the hipervisor, guest OS, database and the applications. > If you only consider that a Xeon is cheaper than an IFL it is anybody's guess > what the final functional outcome for the customer will be. > ________________________________________ > Van: Linux on 390 Port <[email protected]> namens Sergey > Korzhevsky <[email protected]> > Verzonden: woensdag 3 februari 2016 09:44 > Aan: [email protected] > Onderwerp: Re: TCO comparison Intel vs EC12 IFLs > > Just to add 5 cents. > Besides hardware, you also changed database which may have HUGE impact > on performance. > > > 03-02-2016 01:28:09 "Harder, Pieter" wrote: > > >In fact the disk system didn't change with our migration. The VMWare > >farm > was > >run against the same IBM DS8000 the z used. Most of the DS8000 space > >was > used > >for open systems anyway. If memory serves me right before the DS8000 > >went > out > >the door we had 48 disk sets in it and only 6 were used for the z. And > the x86 > >world was connected by the same Cisco SAN switches that were used for > >connecting the open storage on the z. But a world of difference in > resulting > >performance. > > > >best regards, > > > >Pieter Harder > >________________________________________ > >Van: Linux on 390 Port <[email protected]> namens Philipp > Kern > ><[email protected]> > >Verzonden: dinsdag 2 februari 2016 22:24 > >Aan: [email protected] > >Onderwerp: Re: TCO comparison Intel vs EC12 IFLs > > > >On 2016-02-02 14:54, Harder, Pieter wrote: > >> I think there is another factor involved. On x86 you usually run > >> database engines etc with very large caches to avoid going to disk. > >> On z this is much less of a penalty because of the powerful I/O > >> subsystem. I have some experience with this as we moved our SAP > >> systems from z to x86 as part of a strategic directive to focus on > >> one platform. We ended up running the same systems with about ten > >> times the amount of memory on the databases to get like performance. > >> Both platforms were virtualized (Linux on zVM with DB2 versus Windows > >> on VMWare with MSSQL). > > > >But is it really the capability of the I/O subsystem or is it just that > >the storage racks needed for the z are much more beefy than the Netapps > >you usually get for "distributed" virtualization? > > > >I do buy that there's more bandwidth available / less latency, although > >a lot of that depends on how you connect the storage on x86. > > > >Kind regards and thanks > >Philipp Kern > > > >---------------------------------------------------------------------- > >For LINUX-390 subscribe / signoff / archive access instructions, send > >email to [email protected] with the message: INFO LINUX-390 or > visit > >http://www.marist.edu/htbin/wlvindex?LINUX-390 > >---------------------------------------------------------------------- > >For more information on Linux on System z, visit > >http://wiki.linuxvm.org/ > > > >---------------------------------------------------------------------- > >For LINUX-390 subscribe / signoff / archive access instructions, send > >email to [email protected] with the message: INFO LINUX-390 or > visit > >http://www.marist.edu/htbin/wlvindex?LINUX-390 > >---------------------------------------------------------------------- > >For more information on Linux on System z, visit > >http://wiki.linuxvm.org/ > > WBR, Sergey > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, send email to > [email protected] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit http://wiki.linuxvm.org/ > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, send email to > [email protected] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
