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[Bacula-users] Quantum Scalar i500 slow write speed
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From: ekke85 <bac...@ba...> - 2010-08-05 09:57:14
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Hi I have a Quantum Scalar i500 and it works in Bacula, but it is very slow. It writes at 22mb/sec. The drives should be able to do a lot more then that. I have to backup 11TB that takes a couple of days to complete, I don't want to think how long it would take to restore :( This is the output I get from btape without hardware compression: speed file_size=1GB nb_file=3 btape: btape.c:1056 Test with zero data, should give the maximum throughput. btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 64512 bytes. ++++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 63.16 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 71.58 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 70.03 MB/s btape: btape.c:1068 Test with random data, should give the minimum throughput. btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 64512 bytes. ++++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 78.57 MB/s btape: btape.c:1082 Test with zero data and bacula block structure. btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 64512 bytes. +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 56.51 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 53.69 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 53.69 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 54.60 MB/s btape: btape.c:1094 Test with random data, should give the minimum throughput. btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 64512 bytes. ++++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 56.51 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 59.65 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 59.65 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 58.57 MB/s and this is what I get with hradware compression: speed file_size=1GB nb_file=3 btape: btape.c:1056 Test with zero data, should give the maximum throughput. btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 64512 bytes. ++++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 107.3 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 107.3 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 107.3 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 107.3 MB/s btape: btape.c:1068 Test with random data, should give the minimum throughput. btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 64512 bytes. ++++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 78.57 MB/s btape: btape.c:1082 Test with zero data and bacula block structure. btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 64512 bytes. +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 82.60 MB/s btape: btape.c:1094 Test with random data, should give the minimum throughput. btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 64512 bytes. ++++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 53.69 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 56.51 MB/s +++++++++++++++++++++++++++++++++ btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0) btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 59.65 MB/s btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 56.51 MB/s I would have thought Bacula would do speeds similar to this. Please let me know if you need to see the config files. I do not have spooling on and I don't have software compression on. If you can think of anything I can try, please let me know. ekke85 +---------------------------------------------------------------------- |This was sent by ek...@gm... via Backup Central. |Forward SPAM to ab...@ba.... +---------------------------------------------------------------------- |
