On the new projects I work with, we try to allocate mod-3s and mod-9s to zVM and to Linux filesystem (var, home, usr, etc and so...), and use FCP disks to everything else, like Oracle databases, webserver logs, NFS area, and everything it's supposed to grow a lot in the future.
Troubleshooting zVM and Linux installed on 3390 is way easier for me (and for almost every zVM guy) than on FCP. And creating 600GB of storage area in 3390-3 disks is not a pleasant task... So we mix them. Mauro http://mauro.limeiratem.com - registered Linux User: 294521 Scripture is both history, and a love letter from God. On Thu, Jan 13, 2011 at 5:41 PM, Ron Foster at Baldor-IS <[email protected] > wrote: > Hello list, > > This may have been discussed before... > > Way back in deep dark ancient history, we used the Redbook to get > started with Linux under z/VM. As a result, we carved up our storage > subsystem in to a bunch of mod3 drives. We put a few mod 9 drives in > the mix. > > We added drives to a guest in standard chunks. That is when storage was > needed by a Linux system, we added a mod9 or mod3 to it. > > When that Shark went off lease and we moved to a DS8000, we pretty well > kept the same philosophy. Only we added a bunch more mod3 and mod 9 > drives. > > We are a SAP shop and any large databases reside in DB2 on z/OS. There > are a few large file systems on 3 or 4 of our Linux systems, but for the > most part the drives attached to a Linux system go something like this. > A boot drive. One to several mod3 drives for swapping (the appropriate > ones have vdisks). One to several mod3 or mod9 drives for the SAP code > and local files. > > We are moving our production drives. We finally have gotten our > production Linux systems where about half or do very little swapping. > > We do not have dirmaint, so we keep up with disk allocations with > dirmaint and a spreadsheet. > > Now time has come to migrate to another storage system. I was wondering > what other folks do. > > 1. Do they have a whole bunch of mod9 and mod3 drives that they allocate > to their guests? > > 2. Do they take mod27 drives (someone at SHARE warned me about taking > mod54 drives) and use mdisk to carve them up into something smaller. > > Any input would be appreciated. > > Thanks, > Ron Foster > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
