tunefs question

[Ivan Voras]

Bruce Evans wrote:

>   Fragmentation of old, nearly
> full, ffs file systems can be very bad (maybe 10 times slower than a
> new one).  

Not only that, but it seems that sometimes (at least in 6.x) the file
system can be subtly corrupted when filled to the end, and cannot be
recovered even if the files that filled it are deleted and fsck is run.
The symptom of this is random lockups when doing file system intensive
operations.

I'm not mentioning this only because of this thread:
http://lists.freebsd.org/pipermail/freebsd-fs/2007-May/003272.html but I
seem to have it on one of my servers in production since two weeks ago
:( - since a file system has been filled (the "109% used" kind of
filled) and freed a couple of times in the period of about a month, the
system wedges about once a week (and it's been running fine for two
years before this).

So, leaving the 8% alone and making sure NOTHING can touch it (e.g. some
deamon running under root, generating log files...) seems like a good
strategy right now.

Either that, or switch to ZFS, which is what I'm planning.


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