VXVM Commands

东方蜘蛛

Initializing disks and disk groups/etc/vx/bin/vxdisksetup -i c1t100d0
/etc/vx/bin/vxdisksetup -i c1t101d0
/etc/vx/bin/vxdisksetup -i c1t102d0
/etc/vx/bin/vxdisksetup -i c1t103d0
Initializes the physical devices c1t100d0 c1t101d0 c1t102d0 c1t103d0 as VM disks
vxdg init mydg c1t100d0s2 c1t101d0s2 c1t102d0s2 c1t103d0s2
creates a VM disk group containing the VM disks c1t100d0 c1t101d0 c1t102d0 c1t103d0
Creating Volumesvxassist make martin 100m
makes a volume called martin using any disk
vxassist make martin 100m disk10
makes a volume called martin using disk10
vxassist make martin 100m layout=stripe disk07 disk08
creates a 100mb striped volume called martin using disks7 and 8
vxassist mirror martin disk05 disk06
uses disks5 and 6 ro make a mirror on volume called martin
vxassist make martin 50m layout=mirror
makes a 50Mb mirror using any 2 disks
vxassist make martin 50m layout=mirror disk05 disk06
makes a 50mb mirror using disks 5 and 6
vxassist make martin 50m layout=mirror,stripe disk05 disk06 disk07 disk08
makes a 50Mb stripe using disks5 and 6 mirrored across 7 and 8
vxassist make martin 50m layout=mirror,stripe,log disk05 disk06 disk07 disk08
makes a 50Mb stripe using disks5 and 6 mirrored across 7 and 8 and uses a
log subdisk
vxassist make martin 100m layout=raid5
makes a 100m raid5 volume
Displaying VXVM Configurationvxdg list
lists all diskgroups
vxdisk list
lists all disks under VM control and which group their in
vxdisk list disk01
lists the properties of disk01
vxprint -vt
vxprint -l volume_name
vxprint -vl
display's info about the volumes
vxprint -lp
vxprint -l plex_name
displays info about plexes
vxprint -st
vxprint -l disk##-##
displays info about subdisks
ssaadm display -p c#
show disk iops over 10 seconds...
vxtrace vol
traces all i/o on a volume..
vxstat -d
to report disk stats
vxdg free
displays the free space on the disks
to list all volumes on your primary boot disk enter
vxprint -t -v -e 'aslist.aslist.sd_disk="boot_disk_name"'
vxassist maxgrow vol
tells you how much you can grow a volume by
Removing Volumes/Disksvxdisk rm c#t#d#s2
to remove a disk so it's out of vm control
vxedit -rf rm martin
removes a volume called martin and plex(es) and subdisks though
To remove a volume (Version 3.X ONLY)
vxassist -g  remove volume
To destroy an imported disk group (Version 3.X ONLY)
vxdg destroy
Modifying Volumes/usr/sbin/vxedit -g rootdg rename disk12 disk09
to rename disk12 to disk09 in the rootdg
vxedit rm disk10
to remove a greyed out or obsolete disk in this case disk10
or to remove a disk from a diskgroup
vxdisk clearimport c#t#d#s#
to allow a disk to be imported after a server crash
vxdg -g razadg rmdisk test
to remove a disk called test from a dg called razadg
vxdg -g razadg adddisk test=c1t3d3  
to add disk c1t3d3 to a dg called razadg calling the disk test, use vxdisk list
to determine what disks are free :)
vxedit -g rootdg set spare=on disk09
sets disk09 in the rootdg as a hotspare.
Mirroring Volumesvxmirror rootdisk disk01
mirrors all the volumes on the root disk to disk01
vxmirror -g datadg data01 data10
mirrors all the volumes in datadg on disk data01 to disk data10
vxassist -g rootdg mirror vol01 disk03
mirrors vol01 (in rootdg) to disk03
vxassist mirror martin
will mirror the volume martin
to make a mirror manually try
/usr/sbin/vxmake -g rootdg sd disk03-01 dm_name=disk03 dm_offset=0 len=81920
to create a subdisk on disk03 callin the subdisk disk03-01 the len 81920 is
81920sectors x 512bytes =40M
vxmake plex martin-02 sd=disk03-01
creates a plex called martin-02 using subdisk disk03-01
vxplex att martin martin-02
attaches the plex martin-02 to volume martin
Growing/Shrinking Volumesthis shows how you how much you can grow a volume by..
vxassist maxgrow vol01
Volume vol01 can be extended by 18245632 to 18450432 (9009Mb)
vxassist growto martin 2000
grows a volume to 2000 512byte sectors
vxassist growby martin 2000
increases the volume martin by 2000 512byte sectors
vxassist shrinkto vol_name 1000
will shrink a volume by 1000 sectors,
make sure you don't shrink a volume below the current
size of the filesystem
vxassist shrinkby vol_name 1000
shrinks a volume by 1000 sectors
vxvol set len=100000 vol_name
will change the length to 100000 sectors
it cannot increase the volume unless spce is available in the
plexes (use vxassist)
vxsd -s SIZE split orignal_sd newdisk newdisk
this will split an existing subdisk in 2 of the specified SIZE
vxsd join sd1 sd2 new_sd
joins subdisk1 and subdisk1 to create a new subdisk
Starting/Stopping/Fixing Volumesssaadm -t 1|2|3 stop|start controller #
so start/stop disk trays...
vxrecover -s vol_name
will start a volume
vxrecover -s
will start all volumes
vxvol maint vol_name
puts a volume in to maintenance mode
vxmend off plex_name
to offline a plex
vxplex att vol_name plex_name
attches and starts the plex in a volume
vxmend on plex_name
to start plex in volume
if the volume won't start up try
vxinfo volume_name
vxedit set user=martin group=techies mode=0666 volume
sets the owner as martin the group as techies and the mode to rw-rw-rw
on a volume
vxvol rdpol round volume
sets a round robin read policy on a volume
vxvol rdpol prefer vol_name plex_anme
sets a prefered plex to read from.
vxedit set comment="message" disk01-01
sets the comment field to testing
vxedit set putil01="go away" vol01
sets the putil01 to "go away"
vxrecover -b vol
well bring stale plexes back online, -b indcates background job
vxassist move volume !disk10
move the voume to a disk other than disk10
vxmend fix clean plex_name
sets the plax toa clean state so you can start vol and access data
vxsd aslog vol01-01 disk02-01
adds a log disk (disk02-01) to the volume vol01-01
vxassist addlog volume_name
creates a log disk for a raid5 volume.
there are dome variables you can set for debugging
S_DEBUG - prints info when running mode sense command
P_DEDUG - prints info for each ext library function called
I_DEBUG prints progress during get status function
O_DEBUG prints when files are opened
Miscellaneous Commandsvxsd mv disk03-01 disk05-01
moves the contents of subdisk disk03-01 to disk05-01
then moves  subdisk disk05-01 into the plex where subdisk disk03-01
once lived, leaving disk03-01 to your mercy :)
to make a subdisk
vxmake sd disk02-02 disk02,0,8000
this would create a subdisk called disk02-02 at the start of disk02
and would be 8000blocks (4000k) long.
if you wanted to create another subdisk on this disk the offset would be
8000 as this is where the next free space would be onthe disk so...
vxmake sd disk02-02 disk02,8000,8000 would create another 8000block
subdisk.
vxdiskadd c#t#d#
to add bring a new disk under vm control
or you can try...
vxdisksetup -i c#t#d#  
vxvol -g dg volname stop
this stops a volume
vxprint -ht volume
to display info a stripe looks like this..
V  NAME         USETYPE      KSTATE   STATE    LENGTH   READPOL   PREFPLEX
PL NAME         VOLUME       KSTATE   STATE    LENGTH   LAYOUT    NCOL/WID MODE
SD NAME         PLEX         DISK     DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
v  martin       fsgen        ENABLED  ACTIVE   204800   SELECT    martin-01
pl martin-01    martin       ENABLED  ACTIVE   205776   STRIPE    4/128    RW
sd disk04-01    martin-01    disk04   0        51408    0/0       c1t1d2   ENA
sd disk05-01    martin-01    disk05   0        51408    1/0       c1t2d0   ENA
sd disk02-01    martin-01    disk02   0        51408    2/0       c1t3d0   ENA
sd disk03-01    martin-01    disk03   0        51408    3/0       c1t4d0   ENA
a mirror like this...
vxprint -ht martin
Disk group: rootdg
V  NAME         USETYPE      KSTATE   STATE    LENGTH   READPOL   PREFPLEX
PL NAME         VOLUME       KSTATE   STATE    LENGTH   LAYOUT    NCOL/WID MODE
SD NAME         PLEX         DISK     DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
v  martin       fsgen        ENABLED  ACTIVE   204800   SELECT    martin-01
pl martin-01    martin       ENABLED  ACTIVE   205776   STRIPE    4/128    RW
sd disk04-01    martin-01    disk04   0        51408    0/0       c1t1d2   ENA
sd disk05-01    martin-01    disk05   0        51408    1/0       c1t2d0   ENA
sd disk02-01    martin-01    disk02   0        51408    2/0       c1t3d0   ENA
sd disk03-01    martin-01    disk03   0        51408    3/0       c1t4d0   ENA
pl martin-02    martin       ENABLED  TEMPRMSD 205632   CONCAT    -        WO
sd disk10-01    martin-02    disk10   0        205632   0         c1t1d3   ENA
a raid5 like this...
unix# vxprint -ht martin
Disk group: rootdg
V  NAME         USETYPE      KSTATE   STATE    LENGTH   READPOL   PREFPLEX
PL NAME         VOLUME       KSTATE   STATE    LENGTH   LAYOUT    NCOL/WID MODE
SD NAME         PLEX         DISK     DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
v  martin       raid5        ENABLED  ACTIVE   40992    RAID      -
pl martin-01    martin       ENABLED  ACTIVE   42336    RAID      4/32     RW
sd disk04-01    martin-01    disk04   0        14112    0/0       c1t1d2   ENA
sd disk06-01    martin-01    disk06   0        14112    1/0       c1t1d4s2 ENA
sd disk05-01    martin-01    disk05   0        14112    2/0       c1t2d0   ENA
sd disk02-01    martin-01    disk02   0        14112    3/0       c1t3d0   ENA
pl martin-02    martin       ENABLED  LOG      2016     CONCAT    -        RW
sd disk03-01    martin-02    disk03   0        2016     0         c1t4d0   ENA
vxplex -o rm dis plex deletes a plex, or volume if used
with -f
vxplex det plex-0#
detach's one half of the plex..
if a volume is unstartable try
try to start it by  setting one of the plexes in a mirror to CLEAN using
vxmend mirror  plex_name
if this doesn't get the plex back into a kernel state of enabled
try
vxplex att vol_name plex_name
to dissociate a subdisk try
vxsd dis disk##-##
remove a subdisk by
vxedit rm disk##-##
this command show's you what the lagest stripe you
can currently have ?
vxassist maxsize layout=stripe
Maximum volume size: 17833984 (8708Mb)
same again for raid5
vxassist maxsize layout=raid5
Maximum volume size: 12300288 (6006Mb)
Converting Mirror Layouts (Version 3.x ONLY) To convert a mirrored-stripe to a striped-mirror
vxassist -g  convert  layout=stripe-mirror
To convert a striped-mirror to a mirrored-stripe
vxassist -g  convert  layout=mirror-stripe
To convert a striped mirror to a RAID 5.
vxassist -g  relayout  layout=raid5
To change the number of columns, in a RAID 5, to 5
vxassist -g  relayout  ncol=5
Managing active VXVM tasks (Version 3.x ONLY) To list current tasks
vxtask list
To continue to display current tasks
vxtask monitor
To pause task 256
vxtask pause 256
To resume task 256
vxtask resume 256
To abort task 256
vxtask abort 256
Other new commands for Version 3.x ONLY To change the stripe unit size to 25K
vxassist -g  relayout  stwidth=25k
To continue a discontinued relayout operation (process must be stopped)
vxrelayout -g  start
To reverse a discontinured relayout operstion (process must be stopped)
vxrelayout -g  reverse
To get the status of a layout operation
vxrelayout -g  status
To upgrade an older disk to support v3.x relayout operations
vxdg -t 60 upgrade


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