VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

332 VERITAS Volume Manager Administrator’s Guide
defining for snapshot volumes 218
device 3, 54
disk 53
disk media 8, 53
plex 11
plex attribute 158
renaming disks 81
subdisk 9
subdisk attribute 145
VM disk 9
volume 11
naming scheme
changing for disks 61
naming schemes
for disks 54
ndcomirror attribute 172, 194
NEEDSYNC volume state 185
NODAREC plex condition 152
nodes
in clusters 246
maximum number in a cluster 245
node abort in clusters 257
shutdown in clusters 256
NODEVICE plex condition 152
non-layered volume conversion 224
Non-Persistent FastResync 44
nopriv disk type 56
nopriv disks
issues with enclosures 62
O
objects
physical 3
virtual 7
off-host processing 245, 271
OFFLINE plex state 150
online relayout
changing number of columns 221
changing region size 224
changing speed of 224
changing stripe unit size 221
combining with conversion 224
controlling progress of 223
defined 31
destination layouts 221
failure recovery 38
how it works 31
limitations 37
monitoring tasks for 223
pausing 223
performing 221
resuming 223
reversing direction of 224
specifying non-default 221
specifying plexes 222
specifying task tags for 222
temporary area 32
transformation characteristics 38
transformations and volume length 38
types of transformation 35
viewing status of 223
ordered allocation 167, 173, 177
P
parity in RAID-5 25
path failover in DMP 87
pathgroup
create 91
remove 96
performance
analyzing data 287
benefits of using VxVM 281
changing values of tunables 292
combining mirroring and striping 283
effect of read policies 284
examining ratio of reads to writes 290
hot spots identified by I/O traces 290
impact of number of disk group
configuration copies 292
load balancing in DMP 88
mirrored volumes 282
monitoring 285
moving volumes to improve 288
obtaining statistics for disks 288
obtaining statistics for volumes 286
RAID-5 volumes 283
setting priorities 285
striped volumes 282
striping to improve 289
tracing volume operations 285
tuning large systems 291
tuning VxVM 291
using I/O statistics 287
Persistent FastResync 44, 45
physical disks
adding to disk groups 111
clearing locks on 119
complete failure messages 232