* bug#23979: [ER] guix gc should tell how much space it recovered
@ 2016-07-14 10:54 Vincent Legoll
2016-07-14 11:30 ` Vincent Legoll
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Vincent Legoll @ 2016-07-14 10:54 UTC (permalink / raw)
To: 23979
It already shows:
note: currently hard linking saves 485.41 MiB
Recovered disk space would nicely complement that.
I could be mentored to do it myself, but I'm very new to guile & guix
;-)
I'd at least require high level directions as to where I should look (in
the code) to graft that functionality.
--
Vincent Legoll
^ permalink raw reply [flat|nested] 7+ messages in thread* bug#23979: [ER] guix gc should tell how much space it recovered
2016-07-14 10:54 bug#23979: [ER] guix gc should tell how much space it recovered Vincent Legoll
@ 2016-07-14 11:30 ` Vincent Legoll
2016-07-15 14:33 ` Ludovic Courtès
2016-07-16 12:55 ` bug#23979: Fix merged Vincent Legoll
2 siblings, 0 replies; 7+ messages in thread
From: Vincent Legoll @ 2016-07-14 11:30 UTC (permalink / raw)
To: 23979
Looks like I helped myself out of step 1:
this is in guix/scripts/gc.scm if I'm not mistaken
--
Vincent Legoll
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#23979: [ER] guix gc should tell how much space it recovered
2016-07-14 10:54 bug#23979: [ER] guix gc should tell how much space it recovered Vincent Legoll
2016-07-14 11:30 ` Vincent Legoll
@ 2016-07-15 14:33 ` Ludovic Courtès
2016-07-15 15:12 ` Andreas Enge
2016-07-16 12:55 ` bug#23979: Fix merged Vincent Legoll
2 siblings, 1 reply; 7+ messages in thread
From: Ludovic Courtès @ 2016-07-15 14:33 UTC (permalink / raw)
To: Vincent Legoll; +Cc: 23979
Vincent Legoll <vincent.legoll@gmail.com> skribis:
> It already shows:
> note: currently hard linking saves 485.41 MiB
>
> Recovered disk space would nicely complement that.
Indeed.
> Looks like I helped myself out of step 1:
> this is in guix/scripts/gc.scm if I'm not mistaken
Yep, you’re on the right track!
This code calls the ‘collect-garbage’ procedure, defined in (guix
store). You’ll see that this procedure returns two values, which are
currently ignored: the name of the items that were removed from the
store, and the number of bytes freed.
Your mission, if you accept it, is to change gc.scm to retrieve this
second value and to display it in a human-friendly way. :-)
HTH!
Ludo’.
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#23979: [ER] guix gc should tell how much space it recovered
2016-07-15 14:33 ` Ludovic Courtès
@ 2016-07-15 15:12 ` Andreas Enge
2016-07-15 17:06 ` Ludovic Courtès
0 siblings, 1 reply; 7+ messages in thread
From: Andreas Enge @ 2016-07-15 15:12 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 23979
On Fri, Jul 15, 2016 at 04:33:46PM +0200, Ludovic Courtès wrote:
> This code calls the ‘collect-garbage’ procedure, defined in (guix
> store). You’ll see that this procedure returns two values, which are
> currently ignored: the name of the items that were removed from the
> store, and the number of bytes freed.
Brutto or netto? Otherwise said, does it take into account the hardlinks
used for deduplication, or does it pretend that every deleted file saves
as much memory as its size indicates?
Andreas
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#23979: [ER] guix gc should tell how much space it recovered
2016-07-15 15:12 ` Andreas Enge
@ 2016-07-15 17:06 ` Ludovic Courtès
2016-07-16 8:20 ` Vincent Legoll
0 siblings, 1 reply; 7+ messages in thread
From: Ludovic Courtès @ 2016-07-15 17:06 UTC (permalink / raw)
To: Andreas Enge; +Cc: 23979
Andreas Enge <andreas@enge.fr> skribis:
> On Fri, Jul 15, 2016 at 04:33:46PM +0200, Ludovic Courtès wrote:
>> This code calls the ‘collect-garbage’ procedure, defined in (guix
>> store). You’ll see that this procedure returns two values, which are
>> currently ignored: the name of the items that were removed from the
>> store, and the number of bytes freed.
>
> Brutto or netto? Otherwise said, does it take into account the hardlinks
> used for deduplication, or does it pretend that every deleted file saves
> as much memory as its size indicates?
The latter, I think. The actual computation is done by the daemon, in
libstore/gc.cc.
Ludo’.
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#23979: Fix merged
2016-07-14 10:54 bug#23979: [ER] guix gc should tell how much space it recovered Vincent Legoll
2016-07-14 11:30 ` Vincent Legoll
2016-07-15 14:33 ` Ludovic Courtès
@ 2016-07-16 12:55 ` Vincent Legoll
2 siblings, 0 replies; 7+ messages in thread
From: Vincent Legoll @ 2016-07-16 12:55 UTC (permalink / raw)
To: 23979-done
in git commit :
1187a27112be10f2ff74144f50c88714ccf30301
following submission in :
https://lists.gnu.org/archive/html/guix-devel/2016-07/msg00574.html
Thanks for the help
--
Vincent Legoll
^ permalink raw reply [flat|nested] 7+ messages in thread
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2016-07-14 10:54 bug#23979: [ER] guix gc should tell how much space it recovered Vincent Legoll
2016-07-14 11:30 ` Vincent Legoll
2016-07-15 14:33 ` Ludovic Courtès
2016-07-15 15:12 ` Andreas Enge
2016-07-15 17:06 ` Ludovic Courtès
2016-07-16 8:20 ` Vincent Legoll
2016-07-16 12:55 ` bug#23979: Fix merged Vincent Legoll
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