OK, I tried it here (#CP VMDUMP 0-END on a 2G server). Took 15:27 minutes. Better than hours - but still seems long to wait when someone is screaming... Records ended up being 487788.
This was z/VM 5.2 RSU 0602, z9-109 2 engines, 24G memory (20 central, 4xstor), heavily loaded with 80+ servers running - paging to DASD at approx 1000/sec. 2 virtual CPUs on the guest. 2 mod 9's for spool (IBM DS8300). Here's a SWAG- could all those spool writes with the little 4K blocks be overwhelming a certain vendors DASD write cache? How many i/o per sec are you getting off the spool volumes? Marcy Cortes This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation." -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Jim Vincent Sent: Tuesday, January 02, 2007 12:58 To: IBMVM@LISTSERV.UARK.EDU Subject: [IBMVM] CP VMDUMP for a mega server We are doing a VMDUMP for a 2G linux server and it is taking FOREVER. If this was a production server we would be picking daggers out of places I can't mention here. Paging is not too bad on the system (300/sec) and we set the share and reserved for the guest up to maybe help, but nothing seems to get it moving any. It is doing about 1000 spool records every 15-20 seconds and we guestimated it would be about 524288 records; after about an hour it is less than half done!! Is this to be expected? Are we to expect VMDUMP to take that long for these larger guests or do we have a situation we need to dig into? _______________________________________ James Vincent Systems Engineering Consultant Nationwide Services Co., Technology Solutions Mainframe, z/VM and z/Linux Support One Nationwide Plaza 3-20-13 Columbus OH 43215-2220 U.S.A Voice: (614) 249-5547 Fax: (614) 677-7681 mailto:[EMAIL PROTECTED]
