Making FIEMAP and delayed allocation play well together

Posted Feb 24, 2011 21:57 UTC (Thu) by razb (guest, #43424)
In reply to: Making FIEMAP and delayed allocation play well together by corbet
Parent article: Making FIEMAP and delayed allocation play well together

I have hacked raid5+xfs several years ago. from time to time I had this delayed allocation which was a huge headache. Question , can we prevent delayed allocation ?

Making FIEMAP and delayed allocation play well together

Posted Feb 25, 2011 16:32 UTC (Fri) by nix (subscriber, #2304) [Link]

Delayed allocation is a really useful technique to (among other things) keep fragmentation down and increase the size of contiguous writes hitting the disk to something closer to the umpty-megabytes-at-once which the disk would actually prefer. It's better fixed than ripped out, I'd say.