Re: File size discrepancies
Thanks for all the great feedback, guys. It helped. -Modulok- On 9/29/07, Lowell Gilbert <[EMAIL PROTECTED]> wrote: > Modulok <[EMAIL PROTECTED]> writes: > > > So, the size of a directory itself can differ when the contents is > > identical? This is news to me. > > If you delete files from a directory, the storage used for the > directory entries is not freed. > ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: File size discrepancies
Modulok <[EMAIL PROTECTED]> writes: > So, the size of a directory itself can differ when the contents is > identical? This is news to me. If you delete files from a directory, the storage used for the directory entries is not freed. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: File size discrepancies
> du doesn't count in bytes; it counts in disk blocks or KB. A 12KB > difference is probably just due to better packing of directories in > your newly-created tree as compared to your orignal one. To figure out > where the difference is, run "du -a" in both trees and diff the two > outputs. What I did to try and track down the problem: du -a ./dirA | sort -n > dirA.tmp; du -a ./dirB | sort -n > dirB.tmp; diff dirA.tmp dirB.tmp; # Exerp of the diff output: < 554372./images > 554362./images < 17007468 ./video > 17007466 ./video The size discrepancy is the size of the directories, not the files contained within those directories. To be sure I ran: diff -r dirA/images dirB/images; There appears to be no difference in the contents. >du doesn't count in bytes; it counts in disk blocks or KB. A 12KB >difference is probably just due to better packing of directories in >your newly-created tree as compared to your orignal one. So, the size of a directory itself can differ when the contents is identical? This is news to me. Thanks. -Modulok- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: File size discrepancies
In the last episode (Sep 28), Modulok said: > I have a file hierarchy of about 18GiB which was copied from a UFS 2 > file system one hard disk to a UFS 2 file system on a gmirror array. > The size of the two hierarchies differ by 12 bytes according to du(1). > No errors were reported by cp(1) during the copy operation. du doesn't count in bytes; it counts in disk blocks or KB. A 12KB difference is probably just due to better packing of directories in your newly-created tree as compared to your orignal one. To figure out where the difference is, run "du -a" in both trees and diff the two outputs. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: File size discrepancies
Modulok <[EMAIL PROTECTED]> writes: > I have a file hierarchy of about 18GiB which was copied from a UFS 2 > file system one hard disk to a UFS 2 file system on a gmirror array. > The size of the two hierarchies differ by 12 bytes according to du(1). > No errors were reported by cp(1) during the copy operation. > > Is this normal, or should I start hunting for corruption? The explanation is probably benign, but checking is very simple; just build an mtree(8) description on the original hierarchy and check it against the second one. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: File size discrepancies
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Modulok wrote: > I have a file hierarchy of about 18GiB which was copied from a UFS 2 > file system one hard disk to a UFS 2 file system on a gmirror array. > The size of the two hierarchies differ by 12 bytes according to du(1). > No errors were reported by cp(1) during the copy operation. > > Is this normal, or should I start hunting for corruption? Hmmm... 12 bytes out of 18GiB is pretty good going. A 12 byte discrepancy could be due to something as simple as a changed path name in a sym-link or two. Most other reasonable explanations for a size difference I can think of would probably result in a bigger discrepancy. Cheers, Matthew - -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.4 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG/UrG8Mjk52CukIwRCC8yAJwJfgq5bRiUxL0FmTJx0KRTSEl4iQCfR0LD kgdxWwDRQCoGeCTOS0ANDGk= =7DnR -END PGP SIGNATURE- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: File size discrepancies
On Sep 28, 2007, at 11:27 AM, Modulok wrote: I have a file hierarchy of about 18GiB which was copied from a UFS 2 file system one hard disk to a UFS 2 file system on a gmirror array. The size of the two hierarchies differ by 12 bytes according to du(1). No errors were reported by cp(1) during the copy operation. cp may copy through symlinks-- it's not the ideal tool for replicating very large hierarchies if they contain links. tar, rsync, dump/restore might be better choices, and you could use rsync - acv to check for and correct any differences. -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
