From: phobod risc (phobos_risc@yahoo.com)
Date: Wed Aug 21 2002 - 17:45:03 EDT
I have a L60 tape Library and Veritas Netbackup, and i have a problem with the time and data transfer of backups maybe its a problem of tunning, The L60 can backup with a data transfer of 15Mb/s to 30 Mb/s but with Netbackup i backup a directory with size of 3.5Gb and it takes about 20 mins with 4.x Mb/s data transfer, its shows me netbackup, and with ufsdump its slow too.example:
# time ufsdump 0c /backupdir
DUMP: Writing 63 Kilobyte records
DUMP: Date of this level 0 dump: Tue 20 Aug 2002 01:32:07 PM CDT
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/md/rdsk/d0 (resp:/) to /dev/rmt/0.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Estimated 7246422 blocks (3538.29MB).
DUMP: Dumping (Pass III) [directories]
DUMP: Dumping (Pass IV) [regular files]
DUMP: 46.40% done, finished in 0:11
DUMP: 93.46% done, finished in 0:01
DUMP: Tape rewinding
DUMP: 7246384 blocks (3538.27MB) on 1 volume at 2822 KB/sec
DUMP: DUMP IS DONE
real 23:35.2
user 27.0
sys 1:31.4
-----and iostat for the tape while a netbackup making a backup
# iostat -xzn 2
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 77.0 0.0 4851.0 0.0 0.1 0.0 1.7 0 13 rmt/2
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 68.9 0.0 4343.7 0.0 0.1 0.0 1.7 0 12 rmt/2
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 59.5 0.0 3749.3 0.0 0.1 0.0 1.7 0 10 rmt/2
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 83.5 0.0 5262.6 0.0 0.1 0.0 1.7 0 14 rmt/2
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 77.0 0.0 4850.0 0.0 0.1 0.0 1.7 0 13 rmt/2
i check the files in /kernel/drv/st.conf and usr/openv/volmgr/bin/driver/sg.conf and sg drivers but all appears to be right, i check the docs of hp "HP Ultrium" and "HP C7200" (L60 model) and "HP Ultrium 1-SCSI" <-- sg driver, do i need extra parameters in some file?.In the other side of netbackup i have 4 servers and when i execute the backup each one to a single tape (4 in parallel) i dont see the diference because the backup is one by one not all at the same time, i try with 1 server to 4 tapes, and multiplexed too but the data transfer is always the same. Maybe is a problem of configuration of netbackup. sorry for the big mail.
Any suggestions or ideas?
thanks in advance,
Manuel E.
HotJobs, a Yahoo! service - Search Thousands of New Jobs
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 23:24:49 EDT