JFS logs can be very very very busy and you may benefit from have more
than one per volume group. And in some cases you may benefit from
distributing over as many controllers and disks as possible.
Suggested reading: AIX storage management (publication # GG24-4484-00)
You can get this at www.redbooks.ibm.com
> Should the number of VGs be kept to a minimum? Is there any benefits in
> having few jfslogs on the system.
> Edward Dixon
> Senior Consultant
> Coda Consulting
> Open Systems Services and Support.
Having many VG's breaks up the free disk space (FREE PPs) into many
clumps, leaving you less flexibility in expanding filesystems as
I recommend at least 2 VGs for any system beyond single-user
workstations .... rootvg, uservg.
Beyond that it's application dependent.
Open Systems Specialist Champaign, Illinois
/* Opinions expressed are mine... go get your own! */
1. restore and multipe VGs on a single tape
How do you restore a particular file or filesystem from a tape
containing multiple volume groups that was archived using savevg?
I understand 'restvg' restores the entire volume group and 'restore'
restores a specific file or filesystem. By using this:
restore -xf /dev/rmt# ./path_of/file_or_filesystem_to_restore
Can AIX determine which volume group to search for/restore from a tape
containing multiple volume groups?
(please dont tell me to get sysback or storix ... thanks...:) )
thanks very much...:)
Murphy's Law says that the system will fail as it's
writing a backup tape, so you better not depend on
one tape. --> Unix for Dummies
Sent via Deja.com http://www.deja.com/
Before you buy.
3. Max # of VGs and File Systems on a machine.
4. PCMCIA sound cards and Linux - which one (if any) to get?
6. Problem with RH5.2 and ISDN
7. Limit of MAX VGs and MAX FileSystems per machine
10. help finding older version of sysback, or, how to backup VGs