Strange behaviour of UFS2+SU FS on FreeBSD 8-Stable: dreadful perofrmance for old data, excellent for new.

Lev Serebryakov lev at FreeBSD.org
Fri Aug 26 19:28:06 UTC 2011


Hello, Kirk.
You wrote 26 августа 2011 г., 22:33:43:

> If your old disk was full for a long time and had a lot of activity,
> the most recently created files are likely to have poor layout.
> Copying them should give them an improved layout now that much
> more space is available. Best is to copy one, then remove the 
> original copy. Copy the next one and remove its old copy, etc.
> Please let me know if this works, as if it does not, something
> is wrong with growfs.
 Ok, I'll write script for this monotonous work :) I could even copy
them one-by-one via other file system )copy out, delete, copy in).
Will it be better or not?

-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>



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