Re: VIO Storage Group
In a message dated 3/7/2009 3:25:24 P.M. Central Standard Time, martin_pac...@uk.ibm.com writes: So I would be cautious on CPU for VIO to Central against SSD. Anyone who knows anything SUBSTANTIAL like to chip in at this point? >> I went to share.org and searched Austin proceedings for SSD(among a few other things) and only got one hit. Jeffrey Berger's DB/2 experiences with SSD session 1318. Thruput in their benchmarks was increased 10x. 'Course bumping to a Z10 and zHPF didn't hurt either. **Check all of your email inboxes from anywhere on the web. Try the new Email Toolbar now! (http://toolbar.aol.com/mail/download.html?ncid=txtlnkusdown0027) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
I have a naive but serious question: is there a site/shop/company that rents out TSO accounts to small developments? Thanks in advance, Alex. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
If one were looking at CPU, though, it might be a different matter... Long long ago in a decade far far away was The Coffee Table Book. :-) Or so I called the Data In Memory studies orange book. It showed the results of a number of performance studies conducted by Poughkeepsie (and possibly other labs). Some of the fine people who did the studies may very well be watching IBM-MAIN. :-) One of the things I remember is that over a number of data points the VIO to Expanded Storage study showed a net CPU cost for using VIO to ES over regular temporary data sets. The folklore suggested that this was due to simulating a real (then 3380) device via VIO. Recall it maintains the illusion of PHYSICAL I/O to real disk volumes. Now, things may have changed. In particular it's not Expanded Storage but Central. But I doubt the device simulation aspect has changed much. So I would be cautious on CPU for VIO to Central against SSD. Anyone who knows anything SUBSTANTIAL like to chip in at this point? Martin Martin Packer Performance Consultant IBM United Kingdom Ltd +44-20-8832-5167 +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter ID: MartinPacker "They're figuring out that collaboration isn't a productivity hit, it makes them smarter." Sam Palmisano on BlogCentral, 26 November 2008 Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
>IIRC it's dependent on file size, blksize, hit ration, etc...with objective >of 'total thruput'. Lots of studies and papers that need to be updated with >new geometries and interactions. There is still down channel protocol, that doesn't exist in memory access. - Too busy driving to stop for gas! -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
In a message dated 3/7/2009 11:56:44 A.M. Central Standard Time, martin_pac...@uk.ibm.com writes: Remember an SSD read or write is already "downchannel" and beyond the cache in its controller. So I'd expect VIO in Central to do better. >> IIRC it's dependent on file size, blksize, hit ration, etc...with objective of 'total thruput'. Lots of studies and papers that need to be updated with new geometries and interactions. **A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100126575x1219957551x1201325337/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID %3D62%26bcd%3DfebemailfooterNO62) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
Remember an SSD read or write is already "downchannel" and beyond the cache in its controller. So I'd expect VIO in Central to do better. Martin Martin Packer Performance Consultant IBM United Kingdom Ltd +44-20-8832-5167 +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter ID: MartinPacker "They're figuring out that collaboration isn't a productivity hit, it makes them smarter." Sam Palmisano on BlogCentral, 26 November 2008 Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
In a message dated 3/7/2009 8:02:54 A.M. Central Standard Time, martin_pac...@uk.ibm.com writes: Not just page space but also (even better) memory. Even if Expanded Storage has gone away (and with it VIO to Expanded Storage) you can still put temp data sets in a VIO storage group and have them buffered in memory. >> Be interesting to see comparisons with new SSD and VIO in various applications and workloads in conjunction with the specialty processors. Probably be a good paper for SHARE or CMG. What would really be nice if Configurator and/or Health Checker made suggestions. **A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100126575x1219957551x1201325337/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID %3D62%26bcd%3DfebemailfooterNO62) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
Not just page space but also (even better) memory. Even if Expanded Storage has gone away (and with it VIO to Expanded Storage) you can still put temp data sets in a VIO storage group and have them buffered in memory. Note: I wrote the original "VIOTOES" :-) presentation but I'm darned if I can find it - whatever format it was in. :-) A customer and I were discussing this very topic 2 days ago. I'm going to think about which messages from "VIOTOES" to resurrect. Martin Martin Packer Performance Consultant IBM United Kingdom Ltd +44-20-8832-5167 +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter ID: MartinPacker "They're figuring out that collaboration isn't a productivity hit, it makes them smarter." Sam Palmisano on BlogCentral, 26 November 2008 Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: VIO Storage Group
> What (if any) are the benefits of using a VIO Storage Group? > You can use the vio storage group to limit the amount of local page space that be used for the dataset requesting vio. Regards, John -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
VIO Storage Group
What (if any) are the benefits of using a VIO Storage Group? TIA -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
