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11-22-2006 12:32 PM
11-22-2006 12:32 PM
Configuration:
vgname vgext
disk /dev/dsk/c10t2d0
MirroUX disk /dev/dsk/c10t2d1
Configure with cluster and mirror
# VGCHANGE="vgchange -a e -q n"
# VGCHANGE="vgchange -a e -q n -s"
When use -s
Regard
Solved! Go to Solution.
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11-22-2006 07:00 PM - last edited on 09-08-2021 12:24 AM by Parvez_Admin
11-22-2006 07:00 PM - last edited on 09-08-2021 12:24 AM by Parvez_Admin
SolutionRene,
The '-s' tells vgchange not to start synchronising stale extents on the physical volumes (disks). YOu might want to set this to prevent performance problems following some kind of IO failure (such as SCSI or FC, or even disk failure). When a physical volume is activated as part of a vgchange -a e or -a y, then stales extens are synchronised. This can generate a lot of IO which might disable your application performance. Setting the -s option in vgchange prevents this, you can then use vgsync or lvsync manually at some later point (during the night?) to resync your extents.
Of course if you set it, you need to introduce some check for stale extents so you don't miss them...
HTH
Duncan
I am an HPE Employee

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12-09-2006 04:49 PM
12-09-2006 04:49 PM