Thanks for the quick replies:
The volume is the destination for a SnapMirror from the production filer.
The volume contains a single LUN.
FAS3210> df -h /vol/papayasg1_mirror
Filesystem total used avail capacity Mounted on
/vol/papayasg1_mirror/ 260GB 212GB 47GB 82% /vol/papayasg1_mirror/
/vol/papayasg1_mirror/.snapshot 0GB 11GB 0GB ---% /vol/papayasg1_mirror/.snapshot
The LUN is 200GB
FAS3210> lun show /vol/papayasg1_mirror/papayasg1db
/vol/papayasg1_mirror/papayasg1db 200.0g (214778511360) (r/o, online)
NetApp OnCommand System Manager reports that the LUN is 60% used with 79GB free(not sure how to do this at the command line). So that would be 120GB used and that matches what I see when i run a dump. When I run smtape backup it reports 139GB backed up. Not sure why but I think it has to do with SnapShots.
Here's today's test run to a tape drive:
-- dump takes 19 minutes 34 seconds to back up 120GB@105MB/sec , which I consider to be rather good for an LTO4 tape drive
-- smtape backed up 139.481 GB bytes in 0:44:56 so 52MB/sec
FAS3210> sysstat -u 3CPU Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk2% 0 0 0 0 0 0 0 >60 100% 0% - 0%
ops/s in out read write read write age hit time ty util
1% 0 0 0 0 0 0 0 >60 100% 0% - 0%
1% 0 0 0 9 297 0 0 >60 92% 4% T 3%
5% 0 0 0 0 0 0 0 >60 100% 0% - 0%
FAS3210> mt -f nrst0h status
Tape drive: IBM LTO 4 ULT3580
Status: ready, write enabled
Format: LTO 4 800GB
fileno = 0 blockno = 0 resid = 0
FAS3210> date; dump 0f nrst0h /vol/papayasg1_mirror; date
Fri Oct 19 12:58:34 PDT 2012DUMP: Dumping tape file 1 on nrst0h
DUMP: Using Full Volume Dump
DUMP: Date of this level 0 dump: Fri Oct 19 02:50:36 2012.DUMP: Dumping /vol/papayasg1_mirror to nrst0h
DUMP: Date of last level 0 dump: the epoch.DUMP: estimated 126938643 KB.
DUMP: mapping (Pass I)[regular files]
DUMP: mapping (Pass II)[directories]DUMP: Fri Oct 19 13:03:35 2012 : We have written 33948408 KB. 32GB@110MBsec
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: Fri Oct 19 13:08:35 2012 : We have written 68791721 KB. 33GB@113MBsec
DUMP: Fri Oct 19 13:13:35 2012 : We have written 99138845 KB. 28GB@98MB/secDUMP: dumping (Pass V) [ACLs]DUMP: 126442444 KB
DUMP: This dump has written to 1 tapefile(s).
DUMP: DUMP IS DONE
Fri Oct 19 13:18:08 PDT 2012
FAS3210> smtape backup /vol/papayasg1_mirror nrst0h
FAS3210> rdfile /etc/log/backup
(null) Fri Oct 19 13:20:18 PDT /vol/papayasg1_mirror CLI-Backup (nrst0h)
25 Fri Oct 19 13:20:18 PDT /vol/papayasg1_mirror BKP-Start (level 0 backup of Backup Set ID b93ab842-1bbc-11e2-8766-00a09813e8e0)
25 Fri Oct 19 13:20:18 PDT /vol/papayasg1_mirror BKP-Params (originator=CLI mode=dw-data tape_record_size=240KB tape=nrst0h all_snapshots tape_seeding)
25 Fri Oct 19 13:20:19 PDT /vol/papayasg1_mirror BKP-DW-Start
25 Fri Oct 19 14:05:12 PDT /vol/papayasg1_mirror BKP-DW-End (phase completed in 0:44:53; 34870380 blocks moved)
25 Fri Oct 19 14:05:14 PDT /vol/papayasg1_mirror BKP-Tape-Stats (wait_time=488s wait_count=264987 total_count=582596 avail_count=345482/79992/79015/78107)
25 Fri Oct 19 14:05:14 PDT /vol/papayasg1_mirror BKP-End (backed up 139.481 GB bytes in 0:44:56; performance=186.251 GB/hour)
FAS3210>
FAS3210> snap list papayasg1_mirror
Volume papayasg1_mirror
working...
%/used %/total date name
---------- ---------- ------------ --------
0% ( 0%) 0% ( 0%) Oct 19 02:50 FAS3210(1573774893)_papayasg1_mirror.405 (snapmirror)
0% ( 0%) 0% ( 0%) Oct 19 02:50 @snapmir@{D1FE5C41-8C5A-4BAF-BE56-C7E32FCF8C0E}
0% ( 0%) 0% ( 0%) Oct 18 19:03 FAS3210(1573774893)_papayasg1_mirror.404
0% ( 0%) 0% ( 0%) Oct 18 19:03 @snapmir@{9937F7F6-FCC7-4D74-8A79-847C620B5825}
0% ( 0%) 0% ( 0%) Oct 18 19:01 exchsnap__papaya__recent
1% ( 1%) 0% ( 0%) Oct 17 19:01 exchsnap__papaya_10-17-2012_19.00.24__daily
1% ( 1%) 1% ( 0%) Oct 16 19:01 exchsnap__papaya_10-16-2012_19.00.27__daily
2% ( 0%) 1% ( 0%) Oct 16 03:17 FAS3210(1573774893)_papayasg1_mirror.399 (snapmirror)
2% ( 0%) 1% ( 0%) Oct 15 19:01 exchsnap__papaya_10-15-2012_19.00.25__daily
2% ( 0%) 1% ( 0%) Oct 15 13:07 exchsnap__papaya_10-15-2012_13.06.38__daily
3% ( 0%) 1% ( 0%) Oct 14 19:01 exchsnap__papaya_10-14-2012_19.00.26__daily
3% ( 0%) 1% ( 0%) Oct 13 19:01 exchsnap__papaya_10-13-2012_19.00.38__daily
3% ( 0%) 2% ( 0%) Oct 12 19:01 exchsnap__papaya_10-12-2012_19.00.31__daily
4% ( 0%) 2% ( 0%) Oct 11 19:01 exchsnap__papaya_10-11-2012_19.00.26__daily
4% ( 1%) 2% ( 0%) Oct 10 19:01 exchsnap__papaya_10-10-2012_19.00.32__daily
5% ( 1%) 2% ( 0%) Oct 09 19:01 exchsnap__papaya_10-09-2012_19.00.48__daily
6% ( 1%) 3% ( 0%) Oct 08 19:01 exchsnap__papaya_10-08-2012_19.00.30__daily
6% ( 1%) 3% ( 0%) Oct 07 19:01 exchsnap__papaya_10-07-2012_19.00.22__daily
6% ( 0%) 3% ( 0%) Oct 06 19:01 exchsnap__papaya_10-06-2012_19.00.34__daily
7% ( 0%) 3% ( 0%) Oct 05 19:01 exchsnap__papaya_10-05-2012_19.00.29__daily
7% ( 1%) 4% ( 0%) Oct 04 19:01 exchsnap__papaya_10-04-2012_19.00.28__daily
9% ( 2%) 5% ( 1%) Sep 26 21:51 FAS3210(1573774893)_papayasg1_mirror.358 (snapmirror)
Pete--On Fri, Oct 19, 2012 at 12:01 PM, Kennedy, Jeffrey <jkennedy@qualcomm.com> wrote:Do you have a large volume with a small amount of data? Dump will only backup the data but smtape backs up all the blocks regardless if there’s data or not.
Jeff Kennedy
Qualcomm, Incorporated
QCT Engineering Compute
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Peter Kain
Sent: Friday, October 19, 2012 10:24 AM
To: toasters@teaparty.net
Subject: smtape vs. dump
I'm looking at backing up our filer to tape for DR purposes. I've tested both smtape and dump and was surprised that dump was 3 times faster than smtape. The test was preformed on a idle filer. The filer is the destination for SnapMirrors at night and idle during the day.
Given that smtape is a block backup I'd expect it to be as fast or faster than dump. The test Volume contains a single LUN.
FAS3210> version
NetApp Release 8.0.2P6 7-Mode: Fri Jan 27 14:48:08 PST 2012
- filer is idle
FAS3210> sysstat -u 1
CPU Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk
ops/s in out read write read write age hit time ty util
2% 0 1 0 0 0 0 0 2s 100% 0% - 0%
1% 0 2 2 0 0 0 0 2s 100% 0% - 0%
- dump to null takes about 13 minutes
FAS3210> date; dump f null /vol/papayasg1_mirror; date
Tue Oct 16 12:48:06 PDT 2012
DUMP: Using Full Volume Dump
DUMP: Dumping tape file 1 on null
DUMP: Date of this level 0 dump: Tue Oct 16 03:17:08 2012.
DUMP: Date of last level 0 dump: the epoch.
DUMP: Dumping /vol/papayasg1_mirror to null
DUMP: mapping (Pass I)[regular files]
DUMP: mapping (Pass II)[directories]
DUMP: estimated 126361315 KB.
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: Tue Oct 16 12:53:07 2012 : We have written 52672652 KB. 50GB@171MB/sec
DUMP: Tue Oct 16 12:58:07 2012 : We have written 99181873 KB. 44GB@151MB/sec
DUMP: dumping (Pass V) [ACLs]
DUMP: 125867380 KB 120GB@155MB/sec
DUMP: DUMP IS DONE
Tue Oct 16 13:01:18 PDT 2012
- smtape backup to null takes 44 minutes
FAS3210> rdfile /etc/log/backup
(null) Tue Oct 16 13:05:32 PDT /vol/papayasg1_mirror CLI-Backup (null)
19 Tue Oct 16 13:05:32 PDT /
vol/papayasg1_mirror BKP-Start (level 0 backup of Backup Set ID 2bc95ed2-195f-11e2-8766-00a09813e8e0)
19 Tue Oct 16 13:05:32 PDT /vol/papayasg1_mirror BKP-Params (originator=CLI mode=dw-data tape_record_size=240KB tape=null all_snapshots tape_seeding)
19 Tue Oct 16 13:05:33 PDT /vol/papayasg1_mirror BKP-DW-Start
19 Tue Oct 16 13:50:26 PDT /vol/papayasg1_mirror BKP-DW-End (phase completed in 0:44:53; 34394279 blocks moved)
19 Tue Oct 16 13:50:26 PDT /vol/papayasg1_mirror BKP-Tape-Stats (wait_time=0s wait_count=0 total_count=0 avail_count=0/0/0/0)
19 Tue Oct 16 13:50:26 PDT /vol/papayasg1_mirror BKP-End (backed up 137.577 GB bytes in 0:44:54; performance=183.844 GB/hour)
--
Pete Kain
310-506-4475
Pete Kain
310-506-4475