Messages in this thread | | | From | Thorsten Ohl <> | Date | Thu, 21 Jan 1999 18:39:05 +0100 (CET) | Subject | Tar (but not cp) is incredible slow on certain dirs; request for comments/solution ideas/clues. |
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Michael Weller <eowmob@exp-math.uni-essen.de> writes:
> Anyway, effect under all those kernels/# of CPU's is as follows: I > try to backup / (whole linux is in one partition) to another disk, > file on same disk, or even /dev/null (it doesn't matter). It runs > nicely. But when it comes to /usr/src/linux-2.2.0pre7 where the > 2.2.0pre7 sources are, it slows down to a crawl. That means it > backs up one of these really tiny *.c and *.h files there per 1 or > 2 seconds. Basically, it is impossible to back this dir up in any > reasonable time.
Do the numeric uids/gids under /usr/src/linux-2.2.0pre7 correspond to a known user? (Try `find -nouser'). If not, tar can become _really_ slow asking NIS for a username for each file anew.
I had this phenomenon when I upgraded my home machine to SuSE 6.0 with libc6. The default /etc/nssswitch.conf has NIS included, even if NIS is not installed. -- Thorsten Ohl, Physics Department, TU Darmstadt -- ohl@hep.tu-darmstadt.de http://heplix.ikp.physik.tu-darmstadt.de/~ohl/ [<=== PGP public key here]
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