backing up a large host 1

[lnbnatera]

hi,

i have a large host used as a dedicated storage node (fiber connection).

only a single application resides on that machine with 32 filesystems (and still growing). 3gb / filesystem.

there are 4 drives connected to the host.

i use a precmd to shut down the application and pstcmd to shutdown and startup the application during backup sessions.

if i want to divide the 32 filesystems to backup into 4 drives simultaneously, how would i set it up? is it possible to do with just a single group?

my only worry if using multiple groups is the precmd/pstcmd which is associated with the group name

thanks,

 

[605]

You do not need to do anything with respect to configuration as NW will do this automatically. You only need one client and one group.

However, precmd and postcmd will be exectuted at the beginning of the CLIENT backup and at the end, respectively. If you have an application only on certain file systems, i suggest you define multiple client instances for the various purposes.

 

[lnbnatera]

ok, i get your point, but given one client and one group, networker only mounts one tape to one drive.

what i want to achieve is - one client with one group backing up to multiple tape drives simultaneously. is this possible?

 

[Chacalinc]

yes, it is. you should specify each filesystem separately (not "ALL"), so each filesystem is a saveset. The tape drive should be a parallelism of 4 (by default, other if you change it). it means 4 save sets per tape drive (you can adjust to 8 in order to save 8 save set per drive).

Do I explain myself clear? (I speak spanish ;o) )

Chacal, Inc.

 

[new2me]

The way we did this by increasing the devices 'target sessions', then in the client definition we play around with the parallelism number.

 

[Chacalinc]

'target sessions'

that's I wanted to say. Thanks new2me.

Chacal, Inc.