On 05/11/12 10:07, Toby Corkindale wrote:
* set the 'discard' mount flag if you're using ext4, or 'ssd' on btrfs. (This tells the SSD when you've deleted stuff to free up space, and allows it to work a lot more efficiently)
That option is "discard" for btrfs too, the "ssd" option (which is automatically set if the kernel detects the disk as being non-rotational) determines allocation and commit log strategies. The "discard" option is not set by default as it can result in poor performance on some SSDs.
* set 'relatime' mount flag as well; it helps performance on everything, and in ssd cases, avoids a bunch of unnecessary writes.
That's the default on any vaguely modern kernel (set as default in 2.6.30 in 2009). :-) cheers, Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC