ZFS BACKUP SLOW THROUGHPUT
Hi.
I have a Netbackup 7.7.3 environment with a Solaris 11 SPARC Master Server which backups an Oracle ZFS storage, besides another applications.
The ZFS shares are mapped to the Master Server by NFS, so this shares are seen as FS. The information of these ZFS shares goes to LTO5 tapes. I use 2 LTO5 tape drives for this backup operation.
The communication from the ZFS to the Master Server goes through Infiniband.
Two months ago, the throughput of the backups have been too slow. Before that, I registered throughtputs of 180 Mb/sec. That was the average throughput. Now, the throughput is 50 Mb/sec max.
I haven't done any changes on the backup configuration.
Could you help me with some tips to improve the throughput?
Thanks Marianne.
I checked the NFS configuration in the Master Server and compared it to another Master Server with the same ZFS backup solution. I found there were missing options:
root@uxvtbck1 # more /vfstab
/vfstab: No such file or directory
root@uxvtbck1 # more vfstab
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
/devices - /devices devfs - no -
/proc - /proc proc - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
fd - /dev/fd fd - no -
swap - /tmp tmpfs - yes -/dev/zvol/dsk/rpool/swap - - swap - no -
192.168.10.50:/export/respaldo1 - /respaldo1 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.51:/export/respaldo2 - /respaldo2 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.50:/export/respaldo3 - /respaldo3 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.51:/export/respaldo4 - /respaldo4 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.50:/export/respaldo5 - /respaldo5 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.51:/export/respaldo6 - /respaldo6 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.50:/export/respaldo7 - /respaldo7 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectio
192.168.10.51:/export/respaldo8 - /respaldo8 nfs - yes rw,bg,hard,nointr,rsize=1048576,wsize=1048576,proto=tcp,vers=3,forcedirectioThe missing options were proto=tcp,vers=3,forcedirectio
These options were added to the /etc/vfstab file of the Master Server. Before that, the ZFS mount points were unmounted. After the configuration these mount points were mounted again.
I'm running a full backup right now. The throughput is 138 Mb/sec. The backups run faster.