An Ignite server is fairly simple to design. The disk does not have to be high performance at all since all the data (to and from) travels over a slow (relative to disk speeds) LAN connection. The Ignite server can be PARISC or Integrity. Download and install all versions of Ignite (11.11, 11.23 and 11.31) regardless of the version of the HP-UX server (must be 11.11 or higher).
As far as disk space, you must measure each server's storage for vg00 and then multiply the total by 2 or more, the number of backups you will want to keep. A very small server might have 5GB of vg00 files while a big server might have 10-15GB in vg00. However, a number of installations may have stored large application data or databases in vg00 so you may have some systems that require 50 to 100GB for each backup. Here is a script to add up the occupied space for vg00:
#!/usr/bin/sh
MB=0
for x in $(bdf|awk '/\/dev\/vg00\//{print $3/1000}')
do
MB=$(echo "$MB+$x"|bc)
done
echo $MB
This will print a single number for megabytes of occupied space. If you change the $3 to $2 in the awk command, you get the worst case summary of space, the maximum size of all the lvols.
So for 10 servers and 2 backups for each server plus 1 backup in progress), you'll need about 200GB to 900GB of storage, much more if vg00 is very large. I would allocate at least 1000GB to start and after several backups, look at the the free space on the backup server and adjust as needed.
Note that you will need to create a separate mountpoint for /var/opt/ignite since you want to isolate the Ignite backups from the rest of the system.
Bill Hassell, sysadmin
