Re: Expanded Storage Question
Paul, As someone else pointed out, VM still can get some additional performance out of expanded storage. Someone else mentioned xpram, but perhaps the best use is Vdisk for swap. Linux can swap all it wants to the vdisk, and VM will see if parts of that aren't being referenced, and page it out to disk. I'm pretty sure that if you devote part of expanded to xpram, it will all be marked as unusable by anyone else. Mark Post -Original Message- From: paultz [mailto:paultz@;ucia.gov] Sent: Tuesday, November 12, 2002 5:40 PM To: [EMAIL PROTECTED] Subject: Re: Expanded Storage Question If I had a 'green with envy' emoticon, I'd use it here. But since I'm stuck in the past, tell me why you don't configure a 64 bit machine running a 64 bit OS as all real storage? I thought expanded was to be a thing of the past? But as I said, z boxes are just a day dream for me. Paul = We are getting a z800 with 8 gig of storage. We will have a regular engine running VM apps that will use 1 gig central, 1 gig expanded. How do we divide up the remaining 6 gig for the LPAR that has the IFL engine dedicated to it? This LPAR is strictly for zVM running LINUX guests. I tried to search the marist archives but am getting firewall proxy access denied today. We'll be running zVM 4.3 in the IFL.
Re: Expanded Storage Question
It has been said that the VM paging algorithms are tuned for 3 levels of storage, and you will get better performance by giving VM some XSTORE to play with. I would start with 5 gig of central and 1 gig of expanded storage, and play with the ratio from there. Here is a nice writeup on this: http://www.vm.ibm.com/perf/tips/storconf.html Linux can also use expanded storage for a very fast swap device. The xpram driver will provide access to the xstore as if it were any other block device. Just modprobe xpram ; mkswap /dev/slram0 ; swapon /dev/slram0 and away you go. Jay Brenneman Ann Smith cc: Sent by: Linux onSubject: Expanded Storage Question 390 Port <[EMAIL PROTECTED] IST.EDU> 11/12/2002 03:49 PM Please respond to Linux on 390 Port We are getting a z800 with 8 gig of storage. We will have a regular engine running VM apps that will use 1 gig central, 1 gig expanded. How do we divide up the remaining 6 gig for the LPAR that has the IFL engine dedicated to it? This LPAR is strictly for zVM running LINUX guests. I tried to search the marist archives but am getting firewall proxy access denied today. We'll be running zVM 4.3 in the IFL.
Re: Expanded Storage Question
If I had a 'green with envy' emoticon, I'd use it here. But since I'm stuck in the past, tell me why you don't configure a 64 bit machine running a 64 bit OS as all real storage? I thought expanded was to be a thing of the past? But as I said, z boxes are just a day dream for me. Paul = We are getting a z800 with 8 gig of storage. We will have a regular engine running VM apps that will use 1 gig central, 1 gig expanded. How do we divide up the remaining 6 gig for the LPAR that has the IFL engine dedicated to it? This LPAR is strictly for zVM running LINUX guests. I tried to search the marist archives but am getting firewall proxy access denied today. We'll be running zVM 4.3 in the IFL.
Re: Expanded Storage Question
I set up my z/800 z/VM LPAR to be all Central Storage, no Expanded. z/VM supports this. The Linux/390 guests can then use this storage. Linux/390 cannot, to the best of my knowledge, use Expanded Storage at all. Since z/VM and z/Linux are both running 64 bit, this should work well. Note that I haven't actually installed z/VM and Linux on this system yet. -- John McKown Senior Technical Specialist UICI Insurance Center Applications & Solutions Team +1.817.255.3225 > -Original Message- > From: Ann Smith [mailto:annsmith@;thehartford.com] > Sent: Tuesday, November 12, 2002 2:49 PM > To: [EMAIL PROTECTED] > Subject: Expanded Storage Question > > > We are getting a z800 with 8 gig of storage. We will have a regular > engine running VM apps that will use 1 gig central, 1 gig > expanded. How > do we divide up the remaining 6 gig for the LPAR that has the > IFL engine > dedicated to it? This LPAR is strictly for zVM running LINUX guests. I > tried to search the marist archives but am getting firewall > proxy access > denied today. We'll be running zVM 4.3 in the IFL. >
Re: Expanded Storage Question
Ann, You're going to want to configure some of that for expanded as well. Just how to split it up, I really couldn't say. I'm sure (hey Barton!) someone on the list would be better qualified than I. M. z800's. M. Mark Post -Original Message- From: Ann Smith [mailto:annsmith@;thehartford.com] Sent: Tuesday, November 12, 2002 3:49 PM To: [EMAIL PROTECTED] Subject: Expanded Storage Question We are getting a z800 with 8 gig of storage. We will have a regular engine running VM apps that will use 1 gig central, 1 gig expanded. How do we divide up the remaining 6 gig for the LPAR that has the IFL engine dedicated to it? This LPAR is strictly for zVM running LINUX guests. I tried to search the marist archives but am getting firewall proxy access denied today. We'll be running zVM 4.3 in the IFL.
Expanded Storage Question
We are getting a z800 with 8 gig of storage. We will have a regular engine running VM apps that will use 1 gig central, 1 gig expanded. How do we divide up the remaining 6 gig for the LPAR that has the IFL engine dedicated to it? This LPAR is strictly for zVM running LINUX guests. I tried to search the marist archives but am getting firewall proxy access denied today. We'll be running zVM 4.3 in the IFL.
