glen herrmannsfeldt <g...@ugcs.caltech.edu> writes: > For unix/dos/windows file systems, though, there needs to be a disk > cache where FBA blocks are brought into memory and the appropriate > bytes copied to user space. Now, the caching ability of that likely > helps much of the time, but it isn't so different from what CKD > emulation has to do.
in some sense FICON initially cripples fibre channel back to ESCON paradigm that just happens to have faster data transfer rate (but still looses enormous aggregate throughput compared to base fibre channel). 31k IOPS here ftp://ftp.software.ibm.com/common/ssi/sa/wh/n/zsw03059usen/ZSW03059USEN.PDF this has z/os max. z196 with peak of 2m IOPS ftp://public.dhe.ibm.com/common/ssi/ecm/en/zsw03169usen/ZSW03169USEN.PDF zHPF (w/TCW, transport control word) adds layer on top of FICON that somewhat attempts to approach underlying fibre channel thruput ... reaching 92k IOPS ... by transmitting multiple CCWs in single transmission for remote execution ... something I had done in 1980 for STL lab. when remoting 300 people from the IMS group to offsite bldg (as channel extender using some HYPERChannel from NSC (attempting to get the support released in 1980 was blocked by the POK group that was playing with fiber optic stuff that would eventually be released as ESCON). Article claims 2m IOPS for maxed out z196 ... with theoritical peak of 2.2M SSCH running all 14 system assist processors at 100% utilization) and 104 FICON channels to 11 storage subsystems ... but recommends that system assist processor utilization should be kept to 70% or below (aka 1.5M SSCH). this claims for e5-2600, latest emulex delivers over one million IOPS on a single channel http://www.emulex.com/artifacts/0c1f55d0-aec6-4c37-bc42-7765d5d7a70e/elx_wp_all_hba_romley.pdf from (linkedin) Enterprise Systems discussion: Still think the mainframe is going away soon: Think again. IBM mainframe computer sales are 4% of IBM's revenue; with software, services, and storage it's 25% http://lnkd.in/mjYX6H A fully configured max z196 with 80processors goes for $28M and has processor rating of 50BIPS. The 4% for mainframe hardware but 25% total (including software, services, storage), implies multiplier of 25/4 for total cost to customer; i.e. for $28M z196 is $175M ($3.5M/BIPS). IBM has base list price of $1815 for e5-2600 blade which have ratings of 527BIPS ($3.44/BIPS) past posts in this thread: http://www.garlic.com/~lynn/2012l.html#56 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#57 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#59 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#70 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#81 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#87 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#88 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#90 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#100 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#2 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#3 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#4 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#5 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#6 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#7 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012m.html#11 Blades versus z was Re: Turn Off Another Light - Univ. of Tennessee -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
