This document contains only my personal opinions and calls of judgement, and where any comment is made as to the quality of anybody's work, the comment is an opinion, in my judgement.
[file this blog page at: digg del.icio.us Technorati]
rsync -v -axHS --delete --no-whole-file /fs/a/ /fs/b/I was running
dstat
which reported (note
that the disk transfer rate reported is twice the actual
transfer rate):
----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 24 35 0 41 0 0| 63M 62M|1998B 1505B| 0 0 |1252 4270 29 38 0 31 1 1| 63M 67M|1938B 1446B| 0 0 |1244 4326 11 15 0 73 0 1| 26M 63M|2313B 1650B| 0 0 | 660 1888 26 48 0 24 1 1| 75M 62M|1938B 1446B| 0 0 |1435 5042 29 43 0 25 1 2| 73M 66M| 11k 28k| 0 0 |1434 4998 31 43 0 24 1 1| 70M 70M| 11k 6618B| 0 0 |1378 4764 28 51 0 20 0 1| 70M 64M| 105k 9.9k| 0 0 |1497 4898 30 36 0 26 4 4| 67M 70M| 101k 42k| 0 0 |1736 5217 25 47 0 24 1 3| 71M 66M| 28k 3112B| 0 0 |1423 4874 28 49 0 20 1 2| 72M 71M|4252B 4952B| 0 0 |1424 4885 27 46 0 24 2 1| 73M 66M|3078B 3286B| 0 0 |1422 4937 30 42 0 27 0 1| 71M 71M|3440B 6034B| 0 0 |1515 4856 28 48 0 23 1 0| 73M 72M|2283B 1609B| 0 0 |1407 4895 24 42 0 32 0 2| 73M 70M|4270B 2044B| 0 0 |1402 4864 36 36 0 26 2 0| 72M 70M|2374B 1974B| 0 0 |1381 4821 40 36 0 24 0 0| 68M 68M|2012B 1518B| 0 0 |1331 4613 28 38 0 31 0 3| 66M 66M|1968B 1463B| 0 0 |1293 4514 27 34 0 38 0 1| 62M 62M|2841B 1716B| 0 0 |1229 4203 22 50 0 26 1 1| 66M 63M|1860B 1439B| 0 0 |1307 4410 31 25 0 42 1 1| 57M 60M|2526B 2070B| 0 0 |1142 3897 28 50 0 21 0 1| 73M 71M|1946B 1518B| 0 0 |1417 4879 28 49 0 22 1 0| 67M 67M|2200B 1584B| 0 0 |1305 4509 32 35 0 32 1 0| 69M 68M|1963B 1380B| 0 0 |1322 4596 27 50 0 23 0 0| 72M 73M|1800B 1380B| 0 0 |1393 4808 22 45 0 32 0 1| 66M 65M|2314B 1932B| 0 0 |1307 4493 25 43 0 32 0 0| 59M 59M|2012B 1518B| 0 0 |1163 4033 10 23 0 67 0 0| 27M 57M|2012B 1518B| 0 0 | 644 2021 25 48 0 26 0 1| 66M 55M|1963B 1380B| 0 0 |1311 4429 34 39 0 26 0 1| 73M 71M|1800B 1380B| 0 0 |1410 4893 32 44 0 21 1 2| 73M 80M|2314B 1932B| 0 0 |1438 4931 38 43 0 19 0 0| 73M 77M|2150B 1584B| 0 0 |1411 4910 26 48 0 24 1 1| 73M 76M|2128B 1643B| 0 0 |1418 4939 28 45 0 24 2 1| 72M 79M|2379B 1584B| 0 0 |1399 4820 32 44 0 23 1 0| 65M 68M| 19k 28k| 0 0 |1506 4681 37 47 0 13 1 2| 70M 71M|5582B 9936B| 0 0 |1687 4963 30 44 0 25 0 1| 71M 67M|2788B 3654B| 0 0 |1459 4798This was while updating some directories containing mostly large files (large photographs, RPM files), and it was quite impressive. The partitions involved were on the inner cylinders of a 500GB drive and could do about 50MB/s and the reported average of around 35MB/s is pretty good considering it is through the filesystem doing simultaneous reading and writing (obviously not on the same drive).