vxdg import multiple copies of dg

[Danby]

I have a group that needs to import multiple copies of the same diskgroup onto a single host. We are using Vertias vm 4.1.

I have figured out how to renumber the disks and change the dg id and name using vxprivutil, but when I try to import the diskgroup, I get the following error:

VxVM vxdg ERROR V-5-1-587 Disk group tnms00x10_dgcs02: import failed: Disk for disk group in other disk group

Obviously I'm not seeing someplace else that the disk ID is getting stored. vxdiskadm gives me this:
Device: c29t0d0
devicetag: c29t0d0
type: auto
hostid:
disk: name= id=1212634652.210.thh6579q
group: name=tnms00x10_dgcs02 id=1279082831.112.thh6579q
info: format=cdsdisk,privoffset=128
flags: online ready private autoconfig
pubpaths: block=/dev/vx/dmp/c29t0d0 char=/dev/vx/rdmp/c29t0d0
version: 3.1
iosize: min=512 (bytes) max=1024 (blocks)
public: slice=0 offset=1152 len=40781568 disk_offset=0
private: slice=0 offset=128 len=1024 disk_offset=0
update: time=1279086024 seqno=0.150
ssb: actual_seqno=0.0
headers: 0 120
configs: count=1 len=640
logs: count=1 len=96
Defined regions:
config priv 000024-000119[000096]: copy=01 offset=000000 enabled
config priv 000128-000671[000544]: copy=01 offset=000096 enabled
log priv 000672-000767[000096]: copy=01 offset=000000 enabled
lockrgn priv 000768-000839[000072]: part=00 offset=000000
tagid priv 001016-001023[000008]: 0000 00 04 75 64 69 64 5f 61 ..udid_a
0008 00 00 00 00 00 00 00 00 ........



Multipathing information:
numpaths: 2
c29t0d0 state=enabled
c30t0d0 state=enabled

[SoorajCleris]

Hi Danby,

==> I have a group that needs to import multiple copies of the same diskgroup onto a single host.

I am not able to understand the requirement, and I dont think this is possible.

Could you please clarify , what you mean by above query ??? what is your requirement?

Regards
Sooraj

Note: VXDG IMPORT , Import a disk group to make the specified disk group available on the local machine. This will make any configuration information stored with the disk group accessible, including any disk and volume configurations.

[Danby]

The system is a development system that uses a copy of the production data, produced via EMC Business copy (essentially it is copied at the SAN from a snapshot of the production data).

Due to a merger, they have a new development project to build a process to convert part of the data into another format. They can't interfere with their normal dev database, and they will not be getting new hardware to use for development, so they need to import another copy of the data to work on.

What they want is to do is to make another copy of the production data, again via EMC business copy, and import that to work on. Unfortunately, as I said, it has the same tags in the private area, so VXVM won't touch it.

[chris huys_4 · Accepted solution]

Hi,

The easiest solution is if the OS is hp-ux 11.23 or HP-UX 11.31, to upgrade from vxvm 4.1 to vxvm 5.0 as vxvm 5.0 supports, business copy.

If thats not possible, and vxvm 4.1 it stays, then the only supported way to get multiple business copies of the same 'original data' is to do it the "old way".

Here is an example of 1 bc of a cfs diskgroup.
So in youre case, remove all the shared references, you see in beneath procedure and you should be good. (i.e. use gsesrv8 # vxdg init cfsdg2bc cfsdg201=c8t1d1 instead of gsesrv8 # vxdg -s init cfsdg2bc cfsdg201=c8t1d1 )

Also the bc is a "xp bc", but emc bc is not to much different from it. (except that xp bc is offcourse superior in everyway ;) )


bc the lun..

gsesrv8 # date;paircreate -g cfsdg2 -vl;date

gsesrv8 # date;pairdisplay -g cfsdg2 -fcx -IBC0
Mon Nov 19 16:44:02 MET 2007
Group PairVol(L/R) (Port#,TID, LU-M) ,Seq#,LDEV#.P/S,Status, % ,P-LDEV# M
cfsdg2 cfsdg201(L) (CL1-E-4, 1, 0-0 )10063 140.P-VOL PAIR, 100 145 -
cfsdg2 cfsdg201(R) (CL1-E-4, 1, 1-0 )10063 145.S-VOL PAIR, 100 140 -

stop the pairing

gsesrv8 # date;pairsplit -g cfsdg2
Mon Nov 19 16:44:48 MET 2007

gsesrv8 # date;pairdisplay -g cfsdg2 -fcx -IBC0
Mon Nov 19 16:44:52 MET 2007
Group PairVol(L/R) (Port#,TID, LU-M) ,Seq#,LDEV#.P/S,Status, % ,P-LDEV# M
cfsdg2 cfsdg201(L) (CL1-E-4, 1, 0-0 )10063 140.P-VOL PSUS, 100 145 W
cfsdg2 cfsdg201(R) (CL1-E-4, 1, 1-0 )10063 145.S-VOL SSUS, 100 140 -

delete the pair

gsesrv8 # date;pairsplit -S -g cfsdg2 -IBC0;date
Mon Nov 19 16:45:46 MET 2007
Mon Nov 19 16:45:46 MET 2007

gsesrv8 # date;pairdisplay -g cfsdg2 -fcx -IBC0
Mon Nov 19 16:45:50 MET 2007
Group PairVol(L/R) (Port#,TID, LU-M) ,Seq#,LDEV#.P/S,Status, % ,P-LDEV# M
cfsdg2 cfsdg201(L) (CL1-E-4, 1, 0-0 )10063 140.SMPL ----,----- ----- -
cfsdg2 cfsdg201(R) (CL1-E-4, 1, 1-0 )10063 145.SMPL ----,----- ----- -

check if the bc'd lun is updated

c8t1d0 auto:cdsdisk cfsdg201 cfsdg2 online shared
c8t1d1 auto:cdsdisk (cfsdg201) (cfsdg2) online shared

indeed...

backup the vxvm header off c8t1d0

gsesrv8 # /etc/vx/diag.d/vxprivutil dumpconfig /dev/rdsk/c8t1d0 > /var/tmp/vxprivutil_c8t1d0.out

gsesrv8 # cat /var/tmp/vxprivutil_c8t1d0.out |vxprint -D - -d
Disk group: cfsdg2

TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0
dm cfsdg201 - - - - - - -

c8t1d1 auto:cdsdisk - - online

create a "bc" cfsdg2 diskgroup

gsesrv8 # vxdiskunsetup -C c8t1d1

gsesrv8 # vxdisksetup -i c8t1d1

gsesrv8 # vxdg -s init cfsdg2bc cfsdg201=c8t1d1

-s : create as shared diskgroup

gsesrv8 # vxdisk -g cfsdg2bc list
DEVICE TYPE DISK GROUP STATUS
c8t1d1 auto:cdsdisk cfsdg201 cfsdg2bc online shared


gsesrv8 # cat /var/tmp/vxprivutil_c8t1d0.out |vxprint -D - -hvspm > /var/tmp/cfsdg2_volumes

gsesrv8 # cat /var/tmp/cfsdg2_volumes |vxprint -D - -htr
ST NAME STATE DM_CNT SPARE_CNT APPVOL_CNT
DM NAME DEVICE TYPE PRIVLEN PUBLEN STATE
RV NAME RLINK_CNT KSTATE STATE PRIMARY DATAVOLS SRL
RL NAME RVG KSTATE STATE REM_HOST REM_DG REM_RLNK
CO NAME CACHEVOL KSTATE STATE
VT NAME NVOLUME KSTATE STATE
V NAME RVG/VSET/CO KSTATE STATE LENGTH READPOL PREFPLEX UTYPE

PL NAME VOLUME KSTATE STATE LENGTH LAYOUT NCOL/WID MODE
SD NAME PLEX DISK DISKOFFS LENGTH [COL/]OFF DEVICE MODE
SV NAME PLEX VOLNAME NVOLLAYR LENGTH [COL/]OFF AM/NM MODE
SC NAME PLEX CACHE DISKOFFS LENGTH [COL/]OFF DEVICE MODE
DC NAME PARENTVOL LOGVOL
SP NAME SNAPVOL DCO

v ora_bckp20 - DISABLED ACTIVE 102400 SELECT - fsgen

pl ora_bckp20-03 ora_bckp20 DISABLED ACTIVE 102400 CONCAT - RW
sd cfsdg201-01 ora_bckp20-03 cfsdg201 0 102400 0 - DIS

v volb - DISABLED ACTIVE 102400 SELECT - fsgen

pl volb-03 volb DISABLED ACTIVE 102400 CONCAT - RW
sd cfsdg201-02 volb-03 cfsdg201 102400 102400 0 - DIS

update the cfsdg2 "bc" diskgroup with the volume information

gsesrv8 # vxmake -g cfsdg2bc -d /var/tmp/cfsdg2_volumes

gsesrv8 # vxprint -ht -g cfsdg2bc
DG NAME NCONFIG NLOG MINORS GROUP-ID
ST NAME STATE DM_CNT SPARE_CNT APPVOL_CNT
DM NAME DEVICE TYPE PRIVLEN PUBLEN STATE
RV NAME RLINK_CNT KSTATE STATE PRIMARY DATAVOLS SRL
RL NAME RVG KSTATE STATE REM_HOST REM_DG REM_RLNK
CO NAME CACHEVOL KSTATE STATE
VT NAME NVOLUME KSTATE STATE
V NAME RVG/VSET/CO KSTATE STATE LENGTH READPOL PREFPLEX UTYPE

PL NAME VOLUME KSTATE STATE LENGTH LAYOUT NCOL/WID MODE
SD NAME PLEX DISK DISKOFFS LENGTH [COL/]OFF DEVICE MODE
SV NAME PLEX VOLNAME NVOLLAYR LENGTH [COL/]OFF AM/NM MODE
SC NAME PLEX CACHE DISKOFFS LENGTH [COL/]OFF DEVICE MODE
DC NAME PARENTVOL LOGVOL
SP NAME SNAPVOL DCO

dg cfsdg2bc default default 59000 1195489247.348.gsesrv8

dm cfsdg201 c8t1d1 auto 1024 36055008 -

v ora_bckp20 - DISABLED EMPTY 102400 SELECT - fsgen

pl ora_bckp20-03 ora_bckp20 DISABLED EMPTY 102400 CONCAT - RW
sd cfsdg201-01 ora_bckp20-03 cfsdg201 0 102400 0 c8t1d1 ENA

v volb - DISABLED EMPTY 102400 SELECT - fsgen

pl volb-03 volb DISABLED EMPTY 102400 CONCAT - RW
sd cfsdg201-02 volb-03 cfsdg201 102400 102400 0 c8t1d1 ENA

force start the volumes

gsesrv8 # vxvol -f -g cfsdg2bc start ora_bckp20
[root@gsesrv8]/opt/HORCM/usr/bin
gsesrv8 # vxvol -f -g cfsdg2bc start volb
[root@gsesrv8]/opt/HORCM/usr/bin
gsesrv8 # vxprint -ht -g cfsdg2bc
DG NAME NCONFIG NLOG MINORS GROUP-ID
ST NAME STATE DM_CNT SPARE_CNT APPVOL_CNT
DM NAME DEVICE TYPE PRIVLEN PUBLEN STATE
RV NAME RLINK_CNT KSTATE STATE PRIMARY DATAVOLS SRL
RL NAME RVG KSTATE STATE REM_HOST REM_DG REM_RLNK
CO NAME CACHEVOL KSTATE STATE
VT NAME NVOLUME KSTATE STATE
V NAME RVG/VSET/CO KSTATE STATE LENGTH READPOL PREFPLEX UTYPE

PL NAME VOLUME KSTATE STATE LENGTH LAYOUT NCOL/WID MODE
SD NAME PLEX DISK DISKOFFS LENGTH [COL/]OFF DEVICE MODE
SV NAME PLEX VOLNAME NVOLLAYR LENGTH [COL/]OFF AM/NM MODE
SC NAME PLEX CACHE DISKOFFS LENGTH [COL/]OFF DEVICE MODE
DC NAME PARENTVOL LOGVOL
SP NAME SNAPVOL DCO

dg cfsdg2bc default default 59000 1195489247.348.gsesrv8

dm cfsdg201 c8t1d1 auto 1024 36055008 -

v ora_bckp20 - ENABLED ACTIVE 102400 SELECT - fsgen

pl ora_bckp20-03 ora_bckp20 ENABLED ACTIVE 102400 CONCAT - RW
sd cfsdg201-01 ora_bckp20-03 cfsdg201 0 102400 0 c8t1d1 ENA

v volb - ENABLED ACTIVE 102400 SELECT - fsgen

pl volb-03 volb ENABLED ACTIVE 102400 CONCAT - RW
sd cfsdg201-02 volb-03 cfsdg201 102400 102400 0 c8t1d1 ENA

gsesrv8 # vxdisk -g cfsdg2bc list
DEVICE TYPE DISK GROUP STATUS
c8t1d1 auto:cdsdisk cfsdg201 cfsdg2bc online

Greetz,
Chris

[Danby]

Awesome. That works. Thank you very very much