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Re: Debugging lufs vtape and amanda flushing-throtle for amanda
2005-05-23 06:30:01
Dear Paul,
Paul Bijnens schrieb:
Vlad Popa wrote:
So how can I say "Not so fast, Mrs. Amanda !" when taping ?
Are you 100% sure that is the problem??
The last time, it was just a simple DLE too large to fit on the
vtape.
Tape is plenty enough.
I think it must be the ftp timeout otherwise I'm clueless . See the
report of today. It is strange :
These dumps were to tape daily4.
*** A TAPE ERROR OCCURRED: [[writing file: short write]].
Some dumps may have been left in the holding disk.
Run amflush to flush them to tape.
The next tape Amanda expects to use is: daily5.
FAILURE AND STRANGE DUMP SUMMARY:
h50234 /opt/bdc lev 0 FAILED [out of tape]
STATISTICS:
Total Full Incr.
-------- -------- --------
Estimate Time (hrs:min) 0:00
Run Time (hrs:min) 0:28
Dump Time (hrs:min) 0:00 0:00 0:00
Output Size (meg) 25.5 25.4 0.2
Original Size (meg) 25.5 25.4 0.2
Avg Compressed Size (%) -- -- -- (level:#disks ...)
Filesystems Dumped 9 7 2 (1:1 2:1)
Avg Dump Rate (k/s) 4937.6 5089.2 846.6
Tape Time (hrs:min) 0:13 0:11 0:01
Tape Size (meg) 2.7 2.6 0.2
Tape Used (%) 0.1 0.1 0.0 (level:#disks ...)
Filesystems Taped 6 4 2 (1:1 2:1)
Avg Tp Write Rate (k/s) 3.6 3.8 2.0
USAGE BY TAPE:
Label Time Size % Nb
daily4 0:13 2790k 0.1 6
NOTES:
planner: Full dump of h50234:/home/diana promoted from 6 days ahead.
planner: Full dump of h50234:/home/albin promoted from 6 days ahead.
planner: Full dump of h50234:/etc promoted from 6 days ahead.
planner: Full dump of h50234:/home/sawa promoted from 6 days ahead.
planner: Full dump of h50234:/home/oeko promoted from 6 days ahead.
planner: Full dump of h50234:/home/aurel promoted from 6 days ahead.
planner: Full dump of h50234:/opt/bdc promoted from 6 days ahead.
taper: tape daily4 kb 4128 fm 7 writing file: short write
driver: going into degraded mode because of tape error.
DUMP SUMMARY:
DUMPER STATS TAPER STATS
HOSTNAME DISK L ORIG-kB OUT-kB COMP% MMM:SS KB/s MMM:SS KB/s
-------------------------- --------------------------------- ------------
h50234 /etc 0 2440 2440 -- 0:03 930.1 9:26 4.3
h50234 /home/albin 0 12290 12290 -- 0:0110680.8 N/A N/A
h50234 /home/aurel 0 10 10 -- 0:00 144.3 0:28 0.4
h50234 /home/diana 0 10 10 -- 0:00 141.3 0:28 0.4
h50234 /home/oeko 0 170 170 -- 0:001977.3 1:02 2.7
h50234 /home/sawa 0 8390 8390 -- 0:018930.7 N/A N/A
h50234 /home/vlad 2 100 100 -- 0:001120.5 0:48 2.1
h50234 /opt/bdc 0 2650 2650 -- 0:0016052.9 FAILED ----
h50234 /opt/htdocs 1 60 60 -- 0:00 599.0 0:33 1.8
(brought to you by Amanda version 2.4.5)
(BTW: I'll do the formating the output next time, but 1st she'll have to
flush it all without nagging around ..)
Today the directory /opt/bdc is omitted. Tomorrow it will be another.
The data amount in the DLE should fit triple on the tape.
I never saw any indication it was the vtape timing out or being too fast.
As sidenote, two weeks ago, one of my tapes was stuck during the
weekend run, and it hang amanda taper from saterday to monday morning.
When I got in mondaymorning and pressed the buttons from the tapedrive
amanda proceeded with the tapewriting as if nothing happened.
The problem happened in the beginning, when rewinding, so I can't
say it behaves the same when a write to tape would take a long time.
I never saw any indication it was the vtape timing out or being too fast.
I think in my situation it hapens during writing (quite in the middle of
it ..)
In YOUR case the start of writing was delayed about several days. But
during writing your data stream was surely constant.
O.K...
1)So IS there a parameter to slow down the data stream to a constant
level (in amanda.conf) while flushing or not ?
2) I have the 8 shares(ftp-directories) mounted on several mount
points (because of the virtual tape slots) during all the time. If
it is not necessary to have all "slots" mounted all over the time (is it
?) I'd try to have only the appropriate vtape (one share a time )
mounted. After use I' d "eject (aka unmount the share) . I hope, I
could get more performance on the lufs filesystem by this way .
Since I have only the ftp protocol as access to the backup server I have
to use lufs or ftpfs( which is outdated and followed by lufs)
Any (other) ideas to get my dumps on vtape and maximise performance ?
Greetings
Vlad
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