Doing some further research into my NetBackup slow restore performance...I have noticed that if I create a lot of small files....it can take about 10 times as long as creating one big file of the same size.
With a sample set of 500MB... Creating 500MB with of text files (about 30,000 of them) takes about 10 minutes Creating 1 500 MB file takes about 1 minute. Restoring 1 500MB file takes about 1 minute or so...a little more to allow the robot to mount the tape/position the tape etc. Restoring the 30,000 files with NetBackup takes about 20 minutes Restoring the 30,000 files to an alternate location takes about 40 minutes Now interms of backing this all up...well 2.5GB of it takes about 8 minutes. My hardware platform is a Compaq DL360 with dual PIII/933MHz CPUs (only one configured with the kernel to date). Two 36GB (10K RPM) drives configured with Hardware RAID1 1 GB RAM. (The OS is configured with a 2 GB swap space.) Here is the FreeBSD Slice... # /dev/idad0s1c: type: ESDI disk: idad0s1 label: flags: bytes/sector: 512 sectors/track: 32 tracks/cylinder: 255 sectors/cylinder: 8160 cylinders: 8320 sectors/unit: 67891200 rpm: 3600 interleave: 1 trackskew: 0 cylinderskew: 0 headswitch: 0 # milliseconds track-to-track seek: 0 # milliseconds drivedata: 0 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 2097152 0 4.2BSD 2048 16384 89 # (Cyl. 0 - 257*) b: 4194304 2097152 swap # (Cyl. 257*- 771*) c: 67891200 0 unused 0 0 # (Cyl. 0 - 8319) e: 8388608 6291456 4.2BSD 2048 16384 89 # (Cyl. 771*- 1799*) f: 49152000 14680064 4.2BSD 2048 16384 89 # (Cyl. 1799*- 7822*) g: 4059136 63832064 4.2BSD 2048 16384 90 # (Cyl. 7822*- 8319*) mislog01 # df -h Filesystem Size Used Avail Capacity Mounted on /dev/idad0s1a 1008M 50M 878M 5% / /dev/idad0s1g 1.9G 4.0K 1.8G 0% /home /dev/idad0s1e 3.9G 976M 2.7G 26% /usr /dev/idad0s1f 23G 2.5G 19G 12% /var procfs 4.0K 4.0K 0B 100% /proc Have any of you seen this before? Is there some tuning that I can do? _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
