Richard, I restarted our CRR machine last weekend to upgrade it to CMS23 from CMS22. It did not hurt the other SFS SVMs while down.
I cannot say whether it will interface again with the other SFS SVMs when it is brought back up because when I brought it back up, I brought the others down to upgrade them too. Jim -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Schuh, Richard Sent: Wednesday, November 28, 2007 12:10 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CRR Machine We have no protected conversations, so it is more the reference to "serious performance degradation when running in limp mode" that may affect us. The questions of whether CRR could be stopped without causing the file pool servers to crash, and whether restarting the CRR machine while the file pool servers were running would restore normal operation were both addressed by Kris in an earlier post. In the absence of dissenting opinion, it appears that I will be able to move the CRR machine's disks with little or no noticeable effect, so long as I choose a lightly loaded period in which to do it. Regards, Richard Schuh -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Wednesday, November 28, 2007 7:57 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CRR Machine On Tuesday, 11/27/2007 at 11:39 EST, Alan Ackerman <[EMAIL PROTECTED]> wrote: > The question is, when are two-phase commits used? From what others > have told > you, one answer > is when you have R/W access to two different SFS filepools. The reference to a "protected conversation" is an APPC LU 6.2 SYNCLEVEL=SYNCPOINT conversation. It has a two-phase commit semantic built into it. Within a single CMS workunit you can, for example, open an SFS file (one file in one server, or multiple files, or multiple servers) and talk to one or more CICS LU 6.2 transactions (for example) over the network. When your application or one of the CICS transactions COMMITs the workunit, all files and transactions are committed or all are backed out. It doesn't matter whether you're doing this explicitly or not. The CMS file system will try to connect to the CRR server in *anticipation* of your opening a second file or establishing a syncpoint connection. Alan Altmark z/VM Development IBM Endicott -------------------------------------------------------- This message w/attachments (message) may be privileged, confidential or proprietary, and if you are not an intended recipient, please notify the sender, do not use or share it and delete it. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Merrill Lynch. Subject to applicable law, Merrill Lynch may monitor, review and retain e-communications (EC) traveling through its networks/systems. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or error-free. This message is subject to terms available at the following link: http://www.ml.com/e-communications_terms/. By messaging with Merrill Lynch you consent to the foregoing. --------------------------------------------------------
