On 2011-03-31, Otto Moerbeek <o...@drijf.net> wrote: > On Wed, Mar 30, 2011 at 03:45:02PM -0500, Amit Kulkarni wrote: >> In fsck_ffs's pass1.c it just takes forever for large sized partitions >> and also if you have very high number of files stored on that >> partition (used inodes count goes high).
If you really have a lot of used inodes, skipping the unused ones isn't going to help :-) You could always build your large-sized filesystems with a larger value of bytes-per-inode. newfs -i 32768 or 65536 is good for common filesystem use patterns with larger partitions (for specialist uses e.g. storing backups as huge single files it might be appropriate to go even higher). Of course this does involve dump/restore if you need to do this for an existing filesystem. > It is interesting because it really speeds up fsck_ffs for filesystems > with few used inodes. > > There's also a dangerous part: it assumes the cylinder group summary > info is ok when softdeps has been used. > > I suppose that's the reason why it was never included into OpenBSD. > > I'll ponder if I want to work on this. A safer alternative to this optimization might be for the installer (or newfs) to consider the fs size when deciding on a default inode density.
