Date: Mon, 11 Jun 2012 08:14:23 -0400 From: Robert Huff <roberthuff@rcn.com> To: questions@freebsd.org Subject: speed of "dump" Message-ID: <20437.57631.776197.982243@jerusalem.litteratus.org> In-Reply-To: <201206110559.q5B5x0Vu096317@jerusalem.litteratus.org> References: <201206110559.q5B5x0Vu096317@jerusalem.litteratus.org>
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Another thread, which I seem to have lost, was talking about dump and sizing its cache. Per my promise, appended is the log of this morning's level 0 dump, using C=32. THe system is -CURRENT from March, using AMD Phemon II x4/3ghz and SATA 3gbit drives (one internal, one external.). Robert Huff Backup started. at Mon Jun 11 01:59:00 EDT 2012 /backup clean Disk mounted DUMP: Date of this level 0 dump: Mon Jun 11 01:59:02 2012 DUMP: Date of last level 0 dump: the epoch DUMP: Dumping snapshot of /dev/ad2s1a (/) to 2012.Jun.11.root.dump DUMP: mapping (Pass I) [regular files] DUMP: Cache 32 MB, blocksize = 65536 DUMP: mapping (Pass II) [directories] DUMP: estimated 1295163 tape blocks. DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: DUMP: 1295138 tape blocks on 1 volume DUMP: finished in 106 seconds, throughput 12218 KBytes/sec DUMP: level 0 dump on Mon Jun 11 01:59:02 2012 DUMP: Closing 2012.Jun.11.root.dump DUMP: DUMP IS DONE Compressing with gzip ... done DUMP: Date of this level 0 dump: Mon Jun 11 02:02:06 2012 DUMP: Date of last level 0 dump: the epoch DUMP: Dumping snapshot of /dev/ad2s1d (/var) to 2012.Jun.11.var.dump DUMP: mapping (Pass I) [regular files] DUMP: Cache 32 MB, blocksize = 65536 DUMP: mapping (Pass II) [directories] DUMP: estimated 545087 tape blocks. DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: DUMP: 545009 tape blocks on 1 volume DUMP: finished in 72 seconds, throughput 7569 KBytes/sec DUMP: level 0 dump on Mon Jun 11 02:02:06 2012 DUMP: Closing 2012.Jun.11.var.dump DUMP: DUMP IS DONE Compressing with gzip... done DUMP: Date of this level 0 dump: Mon Jun 11 02:04:01 2012 DUMP: Date of last level 0 dump: the epoch DUMP: Dumping snapshot of /dev/ad4p2 (/usr) to 2012.Jun.11.usr.dump DUMP: mapping (Pass I) [regular files] DUMP: Cache 32 MB, blocksize = 65536 DUMP: mapping (Pass II) [directories] DUMP: estimated 34156025 tape blocks. DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: 11.75% done, finished in 0:37 at Mon Jun 11 02:46:45 2012 DUMP: 29.89% done, finished in 0:23 at Mon Jun 11 02:37:39 2012 DUMP: 44.21% done, finished in 0:18 at Mon Jun 11 02:38:07 2012 DUMP: 63.00% done, finished in 0:11 at Mon Jun 11 02:35:56 2012 DUMP: 83.78% done, finished in 0:04 at Mon Jun 11 02:34:02 2012 DUMP: DUMP: 34166302 tape blocks on 1 volume DUMP: finished in 1746 seconds, throughput 19568 KBytes/sec DUMP: level 0 dump on Mon Jun 11 02:04:01 2012 DUMP: Closing 2012.Jun.11.usr.dump DUMP: DUMP IS DONE 569586 /backup/Mon/root 34183010 /backup/Mon/usr 139058 /backup/Mon/var 34891656 /backup/Mon Disk unmounted. Backup complete. at Mon Jun 11 02:33:30 EDT 2012
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