Are you considering using the X4500 as a disk-cache? Or are you simply trying to back the X4500 up?
I've been doing some testing with the X4500 as a disk-cache storage node and have found the following * configure 1 big zpool (RAIDZ/RAIDZ2/Mirror, depending on your space/perf/reliability business needs) * use adv_file as your device type * configure multiple ZFS filesystems, Legato spawns 1 nsrmmd writer process per "device" or adv_file type. If you only configure 1 adv_file device, you only get a single writer, no matter how much data your clients throw at it. Limits you to ~200-250MB/sec. Set reasonable limits on the number of concurrent streams each device will handle to load balance across all available devices. ie. 8 clients sending 2 streams each. Configure 4 ZFS filesystems and let each filesystem handle 4 concurrent streams. Also, configuring multiple adv_file devices gives you the ability to do multiple clone sessions if that is part of your process. So if you have 4 tape drives waiting, 4 adv_file devices will be able to run simultaneous clones. I haven't found any advantage in changing the recordsize. I have not tested compression yet. You can tune the NSR BLOCK SIZE, but I've found the default to be robust. Anything much over 256k has shown to only cause higher service times and wait queues on the disks, with no increase in streaming performance (this was tested more on NBU though). Hope that gives you some starting points -ryan Itay Menahem wrote: >Hi, >Are there any Legato backup system considerations that I should take in >account while building zpools and file systems on a Sun X4500 machine? I was >thinking of such consideration such as the zpool size, file system properties >such as compressions, record size etc. >As far as I understand EMC Legato NetWorker 7.3.2 supports Sun solaris ZFS. > >thanks, > >Itay. > > >This message posted from opensolaris.org >_______________________________________________ >zfs-discuss mailing list >zfs-discuss@opensolaris.org >http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
