Our LCU are connected to 2 processors x 4 channels/processor x 32 operations/channel, so it needs to handle 128 concurrent operations. Of course, the other LCUs are sharing the same physical connections, so at any given instance it is unlikely that a LCU could actually have that many at once.
Thanks, Don -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Scott Rowe Sent: Thursday, January 21, 2010 1:43 PM To: IBM-MAIN@bama.ua.edu Subject: Re: PAGE datasets -- few large or more small I think it's 32 ops per channel, and the DS8000 can handle it. Since you are using dynamic PAV, I would have somewhere in the range of 8 to 16 locals per LPAR, but be sure to balance them across the two sides of the DS8000 for maximum throughput. There should be no problems with multiple locals per volume whether from the same and/or different LPARs. In fact, if you are using the DS8000 feature to stripe volumes across RAID groups, then each 1113 cylinder segment of the volumes will be on a different RAID group. >>> Don Williams <donb...@gmail.com> 1/21/2010 1:18 PM >>> We only have four "DASD" FICON channels from each z10 (2). So all LCUs share the same eight channels (four from each processor). Each FICON channel can handle multiple concurrent I/O's (FICON handles eight concurrent operations?). I don't know how many concurrent I/Os a DS8000 LCU can handle. Would it be 64 (2 processors x 4 channels/processor x 8 operations/channel) or some lesser number? If it 32/processor, then what I am worrying about? ---------------------------------------------------------------------- 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
