Re: How fast is XCF

On Mon, 21 Apr 2008 12:54:54 +0200, Barbara Nitz [EMAIL PROTECTED] wrote: How fast can it be if well tuned and configured and with the best hardware options? FAST. There is no canned answer Our average GRS structure response time is less than 0.008ms. But that's GRS (almost no data

Re: How fast is XCF

Ron, From the numbers you quote it seems it is possible for XCF to significantly outperform TCPIP, which is the question I was asking, so it is going to be worth my company's time to investigage further why our XCF response times are so poor. If you're running a sysplex, it is always a good

Re: How fast is XCF

On Tue, 22 Apr 2008 13:21:44 +0200, Barbara Nitz [EMAIL PROTECTED] wrote: If you're running a sysplex, it is always a good idea to tune XCF (as far as that goes), but keep in mind that my response time numbers are for the ISGLOCK structure. We monitor that because it transfers almost no data

Re: How fast is XCF

Guys, Thanks for the input. I'm sure our system is not optimal, we've only just started to play with it. The question I'm really asking, but obviously didn't make clear enough, is - How fast can it be if well tuned and configured and with the best hardware options? If it's not going

Re: How fast is XCF

How fast can it be if well tuned and configured and with the best hardware options? FAST. If it's not going to be faster than TCPIP, i.e. turn around times of less than a milliSecond, then it has no advantage over TCPIP and has the drawback that it doesn't work to non-mainframes. We need to

Re: How fast is XCF

Is there any point to having XCF communications between LPARs or would TCPIP do just as well for that? You must have XCF for Parallel SYSPLEX; TCP/IP is not used for that low level communication. - Too busy driving to stop for gas!

Re: How fast is XCF

Is there any point to having XCF communications between LPARs or would TCPIP do just as well for that? You must have XCF for Parallel SYSPLEX; TCP/IP is not used for that low level communication. I guess RFC2549 would be no good either then ... ??? Shane ...

Re: How fast is XCF

I guess RFC2549 would be no good either then ... ??? Since I don't know what that is, I cannot answer that. But, I know I would not want to use TCP/IP to handle GRS, DB2 buffer pools, lock structures, etc. - Too busy driving to stop for gas!

Re: How fast is XCF

-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Ted MacNEIL Sent: Monday, April 21, 2008 8:53 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: How fast is XCF I guess RFC2549 would be no good either then ... ??? Since I don't know what

Re: How fast is XCF

[EMAIL PROTECTED] (Shane) writes: I guess RFC2549 would be no good either then ... ??? one of the april 1st RFCs from my rfc index http://www.garlic.com/~lynn/rfcietff.htm click on Term (term-RFC#) in RFCs listed by section and scroll down to April1 April1 5242 5241 4824 4042 4041 3751 3514

How fast is XCF

My company has a product that runs in muliple address spaces on multiple LPARS and on windows unix boxes. Due to the relative response times of XMS and TCPIP we've had to put the high msg activity ASIDs on on the same LPAR as TCPIP is many orders of magnitude slower than XMS. We had hoped

Re: How fast is XCF

What kind of path topology are you using for XCF? CTCs or ICF CF structures? Or what? And to what degree have you tuned XCF? I'm not making any speed claim or promise. Just trying to understand your situation in a little more detail. Thanks, Martin Martin Packer Performance Consultant IBM

Re: How fast is XCF

Ron MacRae wrote: My company has a product that runs in muliple address spaces on multiple LPARS and on windows unix boxes. Due to the relative response times of XMS and TCPIP we've had to put the high msg activity ASIDs on on the same LPAR as TCPIP is many orders of magnitude slower than