Using ZFS for DSUs
LToro
November 4th, 2009
I have a white paper from SUN on configuring ZFS for use as Netbackup DSUs. The example in the white paper shows one ZFS pool, with 4 filesystems. So when you do a 'df', each filesystem looks to have a total amount of space equal to the zfs pool total. So if I have 500gb in a ZFS pool, and 4 filesystems configured in that pool, a df will show EACH filesystem as having 500gb available. How does Netbackup handle this? The white paper makes no reference to utilize zfs reservation or quota on the DSU filesystems.
Thank you
About two years ago I bought
About two years ago I bought a Sun X4500 server for a 6.5.2 media server. I had them break the single pool into 4 different mount points. I had to create a different DSSU for each. Not sure if that is the same as four different file systems. In my case I was using them for different things, so that's what I requested. You may be able to create a storage pool of different DUs to have the equivilant of one.
Were the 4 different mount
Were the 4 different mount points in the same zpool? If thats the case then that is what I'm doing. Each mount point shows the TOTAL amount for the pool:
backuppool 33394636800 36 33392385344 1% /backuppool
backuppool/disk1 33394636800 2107964 33392385344 1% /backuppool/disk1
backuppool/disk2 33394636800 7431 33392385344 1% /backuppool/disk2
backuppool/disk3 33394636800 12345 33392385344 1% /backuppool/disk3
backuppool/disk4 33394636800 74 33392385344 1% /backuppool/disk4
So each mount point is a DSU. SUN recommended breaking it up this way (as opposed to a single mount point) for performance reasons. If you notice, each mount point/zfs filesystem shows ~33TB, which is really the total for the pool (a ZFS "feature"). So, does NB think it has 4x33TB available? Or is it smart enough to realize the 33TB is pooled among the 4 mount points?
i dont know but i can give
i dont know but i can give you a link which may give you any idea
http://learningsolaris.com/archives/category/s10/zfs/
http://www.backupcentral.com/phpBB2/two-way-mirrors-of-external-mailing-lists-3/symantec-netbackup-18/netbackup-6-5-dssu-fragmentation-97921/
Thanks in Advance
Zahid Haseeb
May be create different pools
May be create different pools for each DSSU? :) Don't forget to enable compression it's nice. But I woildn't use ZFS for DSSU cause it like to use RAM and media server need RAM for shared memory.
Would you like to reply?
Login or Register to post your comment.