87 lines
2.2 KiB
Plaintext
87 lines
2.2 KiB
Plaintext
Simple
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Integrated
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Multiplatform
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Backup &
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Archive
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or
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Simply
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Accessible
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Backup &
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Archive
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Performance:
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workstation 2.4 Ghz P4, 512 MB RAM, SATA disk
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over 100 Mbps Ethernet
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to server 2.4 Ghz P4, 2 GB RAM, IDE/SCSI disk array
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~800000 files / 992387 links (lots of hard links)
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~20 GB / 28330052 kB (multiple storage of hard links)
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time: 4h33m
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~ 60 files / sec.
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~ 1700 kB / sec
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cpu usage was negligible.
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bandwidth limited by network for large files.
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top files/sec was much higher than average (> 300).
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conclusion: bottleneck were seek times for DA.
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(hardly optimizable except maybe by sorting inode numbers)
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Same the next day: 3171 files transferred. 1h20min.
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~200 files / sec.
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check filenames with non-ascii characters.
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Seems to work, except if there are non-utf-8 filenames on a utf fs
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(but that can't really work).
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check gid bits.
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Equality checking doesn't work if user is unknown on backup server:
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-r--r--r-- 1 4294967294 users 1449 2004-12-01 15:44 2006-11-27T23.22.42/yoyo.hjp.at/home/camel/wrk/perl-5.8.8/util.h
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-r--r--r-- 1 4294967294 users 1449 2004-12-01 15:44 2006-11-28T10.18.30/yoyo.hjp.at/home/camel/wrk/perl-5.8.8/util.h
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should be one file with two links, not two files.
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Tape performance:
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DDS4 (Vendor: HP Model: C5683A):
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About 5-6 MB/s for /dev/nst0, @ 64 kB Blocksize. (larger bs makes no
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difference). File was about 26 MB, 75% compressible with gzip.
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exit if disk full
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On my 800 MHz PIII, the CPU usage is rather high. Some profiling seems
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to be necessary (or I should get a faster backup server :-)).
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mkdir_p doesn't report the real reason of a failure:
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mkdir_p('/backup/2008-06-20T08.10.56/zeno.hjp.at/.', 777)
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mkdir_p('/backup/2008-06-20T08.10.56/zeno.hjp.at', 777)
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mkdir_p('/backup/2008-06-20T08.10.56', 777)
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failed: Read-only file system
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cannot mkdir /backup/2008-06-20T08.10.56/zeno.hjp.at/.: No such file or directory at /usr/local/share/perl/5.8.8/Simba/CA.pm line 180, <GEN1> line 1.
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The real reason is "Read-only file system" but after mkdir_p returns,
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$! is "No such file or directory". (and anyway Simba::CA::backup2disk
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shouldn't just die, but write a message to the log file first, but
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that's a different problem)
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Ideas:
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* Check if File::Path behaves better.
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* Die on error and let caller catch the error.
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