Package: coreutils
Version: 8.5-1
Severity: minor
File: /bin/cp
I have a backup script that does the typical "rsync followed by cp
-al" to maintain snapshots of the backup. I unexpectedly ran out of
inodes on the destination filesystem the other day...one of the
machines I back up has hundreds of thousands of symlinks on it. These symlinks
all seem to get their inode for each snapshot. I've trivially reproduced the
problem:
$ mkdir sym; cd sym
$ ln -s xxx yyy
$ ln yyy zzz
$ echo foo > aaa
$ ln aaa bbb
$ ls -li
3015279 -rw-r--r-- 2 cchiappa cchiappa 4 Jul 22 09:34 aaa
3015279 -rw-r--r-- 2 cchiappa cchiappa 4 Jul 22 09:34 bbb
659196 lrwxrwxrwx 2 cchiappa cchiappa 3 Jul 22 09:32 yyy -> xxx
659196 lrwxrwxrwx 2 cchiappa cchiappa 3 Jul 22 09:32 zzz -> xxx
$ cd ..
$ cp -al sym sym2
$ ls -li sym sym2
sym:
3015279 -rw-r--r-- 4 cchiappa cchiappa 4 Jul 22 09:34 aaa
3015279 -rw-r--r-- 4 cchiappa cchiappa 4 Jul 22 09:34 bbb
659196 lrwxrwxrwx 2 cchiappa cchiappa 3 Jul 22 09:32 yyy -> xxx
659196 lrwxrwxrwx 2 cchiappa cchiappa 3 Jul 22 09:32 zzz -> xxx
sym2:
3015279 -rw-r--r-- 4 cchiappa cchiappa 4 Jul 22 09:34 aaa
3015279 -rw-r--r-- 4 cchiappa cchiappa 4 Jul 22 09:34 bbb
3015281 lrwxrwxrwx 1 cchiappa cchiappa 3 Jul 22 09:35 yyy -> xxx
3015284 lrwxrwxrwx 1 cchiappa cchiappa 3 Jul 22 09:35 zzz -> xxx
Notice that the regular files in sym2 share an inode with their
source, but but we now have three inodes for the symlinks (1 for
sym/{yyy,zzz} and 1 each for sym2/{yyy,zzz}).
Workaround: eliminate the cp -al and use rsync's --list-dest support
(which is a little bit tricky but I suppose more integrated anyhow)
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages coreutils depends on:
ii libacl1 2.2.49-3 Access control list shared library
ii libattr1 1:2.4.44-2 Extended attribute shared library
ii libc6 2.11.2-2 Embedded GNU C Library: Shared lib
ii libselinux1 2.0.94-1 SELinux runtime shared libraries
coreutils recommends no packages.
coreutils suggests no packages.
-- no debconf information
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