From: Ricardo Wurmus <rekado@elephly.net>
To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: guix-devel@gnu.org
Subject: Re: File search progress: database review and question on triggers
Date: Tue, 11 Aug 2020 17:43:05 +0200 [thread overview]
Message-ID: <87y2ml429i.fsf@elephly.net> (raw)
In-Reply-To: <87sgcuh8rb.fsf@ambrevar.xyz>
Pierre Neidhardt <mail@ambrevar.xyz> writes:
> 3. Size of the database:
> I've persisted all locally-present store items for my current Guix version
> and it produced a database of 72 MiB. It compresses down to 8 MiB
> in zstd.
For comparison, my laptop’s store contains 1,103,543 files, excluding
.links 691,994. The updatedb database for all of them is 86MB and takes
~6 seconds to generate:
time updatedb \
--localpaths=/gnu/store \
--findoptions='( -path /gnu/store/.links -o -name *.drv -o -name *.chroot ) -prune -o -type f -print' \
--output=/tmp/dbfile
locate -d /tmp/dbfile ecxc0800
(This could be further tweaked to exclude links…)
> The worse case is around (number of guix generations) x ~100 MiB.
This seems a little excessive.
> 4. Indexing speed:
> The above items took some 20 minutes to complete (on my rather
> powerful machine).
Oof. The updatedb hack above takes 6 seconds on my i7-6500U CPU @
2.50GHz with SSD.
I’m not suggesting to use updatedb, but I think it can be instructive to
look at how the file database is implemented there. We don’t have to
use SQlite if it is much slower and heavier than a custom inverted
index.
--
Ricardo
next prev parent reply other threads:[~2020-08-11 15:44 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 14:32 File search progress: database review and question on triggers Pierre Neidhardt
2020-08-11 9:43 ` Mathieu Othacehe
2020-08-11 12:35 ` Pierre Neidhardt
2020-08-15 12:48 ` Hartmut Goebel
2020-08-11 15:43 ` Ricardo Wurmus [this message]
2020-08-11 17:54 ` Pierre Neidhardt
2020-08-11 17:58 ` Pierre Neidhardt
2020-08-11 20:08 ` Ricardo Wurmus
2020-08-12 19:10 ` Pierre Neidhardt
2020-08-12 20:13 ` Julien Lepiller
2020-08-12 20:43 ` Pierre Neidhardt
2020-08-12 21:29 ` Julien Lepiller
2020-08-12 22:29 ` Ricardo Wurmus
2020-08-13 6:55 ` Pierre Neidhardt
2020-08-13 6:52 ` Pierre Neidhardt
2020-08-13 9:34 ` Ricardo Wurmus
2020-08-13 10:04 ` Pierre Neidhardt
2020-08-15 12:47 ` Hartmut Goebel
2020-08-15 21:20 ` Bengt Richter
2020-08-16 8:18 ` Hartmut Goebel
2020-08-12 20:32 ` Pierre Neidhardt
2020-08-13 0:17 ` Arun Isaac
2020-08-13 6:58 ` Pierre Neidhardt
2020-08-13 9:40 ` Pierre Neidhardt
2020-08-13 10:08 ` Pierre Neidhardt
2020-08-13 11:47 ` Ricardo Wurmus
2020-08-13 13:44 ` Pierre Neidhardt
2020-08-13 12:20 ` Arun Isaac
2020-08-13 13:53 ` Pierre Neidhardt
2020-08-13 15:14 ` Arun Isaac
2020-08-13 15:36 ` Pierre Neidhardt
2020-08-13 15:56 ` Pierre Neidhardt
2020-08-15 19:33 ` Arun Isaac
2020-08-24 8:29 ` Pierre Neidhardt
2020-08-24 10:53 ` Pierre Neidhardt
2020-09-04 19:15 ` Arun Isaac
2020-09-05 7:48 ` Pierre Neidhardt
2020-09-06 9:25 ` Arun Isaac
2020-09-06 10:05 ` Pierre Neidhardt
2020-09-06 10:33 ` Arun Isaac
2020-08-18 14:58 ` File search progress: database review and question on triggers OFF TOPIC PRAISE Joshua Branson
2020-08-27 10:00 ` File search progress: database review and question on triggers zimoun
2020-08-27 11:15 ` Pierre Neidhardt
2020-08-27 12:56 ` zimoun
2020-08-27 13:19 ` Pierre Neidhardt
2020-09-26 14:04 ` Pierre Neidhardt
2020-09-26 14:12 ` Pierre Neidhardt
2020-10-05 12:35 ` Ludovic Courtès
2020-10-05 18:53 ` Pierre Neidhardt
2020-10-09 21:16 ` zimoun
2020-10-10 8:57 ` Pierre Neidhardt
2020-10-10 14:58 ` zimoun
2020-10-12 10:16 ` Ludovic Courtès
2020-10-12 11:18 ` Pierre Neidhardt
2020-10-13 13:48 ` Ludovic Courtès
2020-10-13 13:59 ` Pierre Neidhardt
2020-10-10 16:03 ` zimoun
2020-10-11 11:19 ` Pierre Neidhardt
2020-10-11 13:02 ` zimoun
2020-10-11 14:25 ` Pierre Neidhardt
2020-10-11 16:05 ` zimoun
2020-10-12 10:20 ` Ludovic Courtès
2020-10-12 11:21 ` Pierre Neidhardt
2020-10-13 13:45 ` Ludovic Courtès
2020-10-13 13:56 ` Pierre Neidhardt
2020-10-13 21:22 ` Ludovic Courtès
2020-10-14 7:50 ` Pierre Neidhardt
2020-10-16 10:30 ` Ludovic Courtès
2020-10-17 9:14 ` Pierre Neidhardt
2020-10-17 19:17 ` Pierre Neidhardt
2020-10-21 9:53 ` Ludovic Courtès
2020-10-21 9:58 ` Pierre Neidhardt
2020-10-12 11:23 ` zimoun
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