Disaster recovery of an SP node

[bjverzal]

Hi *,

This weekend we are doint a disaster recovery test. We are recovering our S80, a single SP node and the CWS.

We've got all of the information necessary for the S80 and CWS, the question I have is how do we restore the node ? We can do a install from the CWS, but how do we get our SAP and DB2 information from the image on the CWS, without overwriting the ODM ?

Thanks, Bill.

 

[aixqueen]

is it all one volume group? your data and you database?

Because you would have made a mksysb that you will restore the node with....

backup a node.... /spdata/sys1/install/images directory is exported with root access to the node that will be performing the backup?
mount spcwen0:/spdata/sys1/install/images /mnt
on the node you issue mkszfile && mksysb /mnt/bos.obj.nodename

remember the backup_name must begin with bos.obj
Check the CWS to verify the mksysb image is created...

This only backs up rootvg, of course...

----------------------
Restore the node image

On the CWS issue splstdata -b and verity the name of the image to install
ensure the CWS is configured properly...you may have to redo setup_server and make sure that the install image is bos.obj.nodename ?

you can check with the s1term frame_number node_number command to see where it is during install?

Once the node installs the image, the node will pull the latest SDR stuff from the CWS...
-------------------------------
Backing up non rootvg volume groups?
Most use ADSM or other products...but you can export the desired filesystem from the node to the CWS such as /DB2PE

Export the filesystem from the node to the CWS
on the cws create a directory to serve as a temporary mountpoint... say /db2pe
On the cWS mount the nodes /DB2PE filesystem on the temporary /db2pe mount point.
mount node:/DP2PE /db2pe
On the CWS use tar to backup the data from the filesystem to 8mm tar -cvf /dev/rmt0 rewind
----------------
Restoring non-rootvg filesystems:
To restore the filesystem follow the above as in nfs mount ....that you used to make the backup...
ie. create mountpoint, on CWS mount it, etc....
then tar -xvf /dev/rmt0 /db2pe

Not sure if that answers your question?

 

[bjverzal]

Basically, the SP node we are recovering will not match the hardware of our production system (at least I assume it will not, and I should probably plan for that).

So, when I restore from the mksysb, how can I be sure my ODM will not be corrupt, and will match the recovery system ? We have the mksysb's on the CWS - yes.

Bill.