ZFS on USB 3

posted on 12:29 AM on Sunday 15 February 2015

The eSATA link to the external drive enclosures were still acting up. So I decided to switch them to USB 3 instead. It was quite easy actually, umount the drive, export using ZFS, swap the cables to USB 3, switch the enclosures to USB and import using ZFS. All these while the system was still up and running. Not bad. And the performance is very reasonable as shown below:

Version 1.96 ------Sequential Output------ --Sequential Input- --Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
bob 31232M 42 34 154130 37 64967 12 458 99 178518 12 44.1 1
Latency 53046us 7613us 757ms 43532us 325ms 565ms
Version 1.96 ------Sequential Create------ --------Random Create--------
bob -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
 files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
 16 20318 63 +++++ +++ 18131 98 13984 96 +++++ +++ 31564 98
Latency 18721us 365us 435us 39175us 51us 334us