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* bug#24937: "deleting unused links" GC phase is too slow
@ 2016-11-13 17:41 Ludovic Courtès
  2016-12-09 22:43 ` Ludovic Courtès
                   ` (3 more replies)
  0 siblings, 4 replies; 25+ messages in thread
From: Ludovic Courtès @ 2016-11-13 17:41 UTC (permalink / raw)
  To: 24937

‘LocalStore::removeUnusedLinks’ traverses all the entries in
/gnu/store/.links and calls lstat(2) on each one of them and checks
‘st_nlink’ to determine whether they can be deleted.

There are two problems: lstat(2) can be slow on spinning disks as found
on hydra.gnu.org, and the algorithm is proportional in the number of
entries in /gnu/store/.links, which is a lot on hydra.gnu.org.

Ludo’.

^ permalink raw reply	[flat|nested] 25+ messages in thread

end of thread, other threads:[~2021-11-22  2:31 UTC | newest]

Thread overview: 25+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-11-13 17:41 bug#24937: "deleting unused links" GC phase is too slow Ludovic Courtès
2016-12-09 22:43 ` Ludovic Courtès
2016-12-11 13:46 ` Ludovic Courtès
2016-12-11 14:23   ` Mark H Weaver
2016-12-11 18:02     ` Ludovic Courtès
2016-12-11 19:27       ` Mark H Weaver
2016-12-13  0:00         ` Ludovic Courtès
2016-12-13 12:48           ` Mark H Weaver
2016-12-13 17:02             ` Ludovic Courtès
2016-12-13 17:18               ` Ricardo Wurmus
2020-04-16 13:26                 ` Ricardo Wurmus
2020-04-16 14:27                   ` Ricardo Wurmus
2020-04-17  8:16                     ` Ludovic Courtès
2020-04-17  8:28                       ` Ricardo Wurmus
2016-12-13  4:09         ` Mark H Weaver
2016-12-15  1:19           ` Mark H Weaver
2021-11-09 14:44 ` Ludovic Courtès
2021-11-09 15:00   ` Ludovic Courtès
2021-11-11 20:59   ` Maxim Cournoyer
2021-11-13 16:56     ` Ludovic Courtès
2021-11-13 21:37       ` bug#24937: [PATCH 1/2] tests: Factorize 'file=?' Ludovic Courtès
2021-11-13 21:37         ` bug#24937: [PATCH 2/2] daemon: Do not deduplicate files smaller than 4 KiB Ludovic Courtès
2021-11-16 13:54           ` bug#24937: "deleting unused links" GC phase is too slow Ludovic Courtès
2021-11-13 21:45       ` Ludovic Courtès
2021-11-22  2:30 ` John Kehayias via Bug reports for GNU Guix

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