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VxVM CLI Cheat Sheet
VxVM Cheat Sheet
-------INFORMATION-------------------------------------------------
vxprint -ht ==> Prints VxVM config
* -h List hierarchies below selected records.
* -t Print single-line output records that depend upon
the configuration record type. For disk groups,
the output consists of the record type (dg) the
disk group name, and the disk group ID.
vxprint -g <volumegroup> -ht ==> Prints VxVM config of <volumegroup>
vxdisk list ==> Lists all disks (both VxVM and Unix Controlled)
-------VOLUME GROUPS------------------------------------------------
vxdctl enable ==> scan system for new disks. (i.e. after adding disks
from EMC, you need to run `vxdctl enable` to see them through
VxVM.
How to create a volume manager(ed) disk:
# Scan for Added Disk
vxdctl enable
# Initialize new disks (<diskname>)
/usr/lib/vxvm/bin/vxdisksetup -i <diskname>
# Create new volume group, and add disk(s)
vxdg init <new vg> <disk1>=<diskname1> <disk2>=<diskname2>
-------VOLUMES------------------------------------------------------
vxassist -g <vg> -b make <volumename> <length> layout=<layouttype> comment=<comment> fstype=<fstype> <disk> <disk> <disk>
*-b option puts command in the background, this is advisable.
*VALID <layouttype>'s SEE APPENDIX A
vxassist -g <vg> -b remove volume <volumename>
Top Secret Cool Stuff:
vxassist -g vg27 -b make unused `vxassist -g vg27 maxsize | awk '{print $4}'` layout=concat comment="UNUSED"
## MAINTENANCE COMMANDS
# Grow Volume
vxassist -g <vg> growto <volname> <length>
--------FILE SYSTEMS------------------------------------------------
# Create VXfS filesystem, with large file support
mkfs -F vxfs -o largefiles /dev/vx/rdsk/vg02/lvol03
-------APPENDIX A---------------------------------------------------
concat-mirror
New volumes should be concatenated and mirrored.
The mirroring is handled at each a subdisk level.
The attribute stripe-mirror-col-split-trigger-pt
is applied.
contig, nocontig
Disallow or allow (default) plexes, regular stripe
columns, or RAID-5 stripe columns from using mul-
tiple regions of disk. If contig is specified,
then plexes and columns must be allocated from a
single contiguous region of disk. If this is not
possible, the allocation fails. By default, vxas-
sist tries to allocate space contiguously, but
will use multiple regions or multiple disks if
needed.
diskalign, nodiskalign
Align (default) or do not align subdisks on
cylinder boundaries. When alignment is not dis-
abled, subdisks are created beginning on cylinder
boundaries and are extended to match the end of a
cylinder. Dirty region log subdisks, however, are
not cylinder aligned (they are usually only 2 or 3
blocks long). Instead, when creating log sub-
disks, spaces are located from the available disks
that could not be turned into regular subdisks
because the spaces aren't cylinder aligned. For
example, once one cylinder is used for a log sub-
disk, that cylinder cannot be used to create an
aligned data (or RAID-5 log) subdisk, so other log
subdisks will be created there until that cylinder
fills up.
grow, nogrow
Allows a volume to grow during a relayout opera-
tion.
log, nolog
Create (or do not create) dirty region logs (for
mirrored volumes) or log plexes (for RAID-5
volumes) when creating a new volume. This attri-
bute can be specified independently for mirrored
and RAID-5 volumes with the raid5log and regionlog
layout specifications. The current implementation
does not support the creation of DCM logs in the
layout specification.
mirror, nomirror, raid5
New volumes should be mirrored, unmirrored
(default), or RAID-5, respectively. For mirror,
the attributes stripe-mirror-col-trigger-pt and
stripe-mirror-col-split-trigger-pt are applied.
mirror-concat
New volumes should be mirrored. The mirroring is
done at the volume level. The attributes stripe-
mirror-col-trigger-pt and stripe-mirror-col-
split-trigger-pt are ignored with this layout.
mirror-stripe
New volumes should be mirrored and striped. The
mirroring is done at the volume level. The attri-
butes stripe-mirror-col-trigger-pt and stripe-
mirror-col-split-trigger-pt are ignored with this
layout.
raid5log, noraid5log
Create (default) or do not create log plexes for
RAID-5 volumes.
regionlog, noregionlog
Create or do not create (default) dirty-region log
subdisks for mirrored volumes.
shrink, noshrink
Allows a volume to shrink during a relayout opera-
tion.
span, nospan
Allow (default) or disallow plexes, regular stripe
columns, or RAID-5 stripe columns from spanning
multiple disks. If nospan is indicated, then
plexes or columns can be formed from multiple
regions of the same disk, but cannot be formed
from more than one disk.
stripe, nostripe
New plexes should be striped or unstriped, respec-
tively. When creating a new volume, the default
is nostripe. When adding a new plex to an exist-
ing volume, the default is stripe if the volume
already has one or more striped plexes, and nos-
tripe in other cases. For stripe (when combined
with mirror, the attributes stripe-mirror-col-
trigger-pt and stripe-mirror-col-split-trigger-pt
are applied.
stripe-mirror
New volumes should be striped and mirrored. The
mirroring is handled at each column level or sub-
disk level depending on the attribute stripe-
mirror-col-split-trigger-pt.
stripe-mirror-col
New volumes should be striped and mirrored. The
mirroring is handled at each column level. The
attributes stripe-mirror-col-trigger-pt and
stripe-mirror-col-split-trigger-pt are ignored
with this layout.
stripe-mirror-sd
New volumes should be striped and mirrored. The
mirroring is handled at each a subdisk level.
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