I pulled a random full backup of an F540 that is direct connected to a DLT7000 and it ran at 16.7 GB per hour. mrtg shows the CPU averaging 65% during the backup.
An F760 with a direct connected DLT7000 ran at 27.5 GB per hour. This barely gets the CPU above 20%.
I'd guess you're running up against some system resource on your F520. The type of data (lots of little files compared to not very many large files) can have a lot to do with it too. Is your filer busy doing other things while the backup is running?
BTW, we use Netbackup.
Graham
mgx@spruce.lsd.ornl.gov wrote:
i'd love to see 35-45GB/hour. the netapps are on a 100MB full-duplex lan. we're using budtool 4.5/ndmp and the tapedevice is nrst0a (70GB/compressed). this is what the netapp thinks about the tape drive/scsi adapter:
slot 2: SCSI Host Adapter 2 (QLogic ISP 1040B) Firmware Version 2.26 Clock Rate 60MHz. 4: QUANTUM DLT7000 1E48 In-Band Enclosure Services 0 Swap Events, 0 Enclosure Eventswhere is my problem i wonder?
-- michael
On Thu, Mar 25, Jason D. Kelleher wrote:
In message 19990325105303.A7088@avatar.lsd.ornl.gov, mgx@spruce.lsd.ornl.g ov writes:
fwiw, i'm backing up my two F520's via ndmp to a DLT7000 and i'm averaging about 11.7GB/hour.
-- michael
That sounds slow. We're readying an F740 for production and our tests show ~3MB/s (~11GB/hr) over a 110mb full-duplex connection to a Sun "backup server" with a DLT4000 jukebox. That's theoretical max on a DLT4000 and still plenty of room on the network. Haven't tried multiple concurrent dumps yet, so I'm not sure how well that would scale. You should see about triple the throughput to a single DLT7000. jason