!CcTBuBritXGywOEGWJ:matrix.org

NixOS Binary Cache Self-Hosting

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About how to host a very large-scale binary cache and more62 Servers

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13 Aug 2023
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21 Aug 2023
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@elvishjerricco:matrix.org@elvishjerricco:matrix.org Linux Hackerman: I had completely forgotten I joined this place or that it existed 08:38:29
@linus:schreibt.jetzt@linus:schreibt.jetzthehe08:38:34
@linus:schreibt.jetzt@linus:schreibt.jetztand what we were tlaking about is the most recent discussion in here!08:38:44
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgHm I'll probably stick with my nginx+dumb cache until there's a good way to push from hydra08:40:02
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgI've got plenty of space on my zfs pool for a good while08:40:12
@linus:schreibt.jetzt@linus:schreibt.jetztmaybe keep the nars on the SSD though08:40:26
@linus:schreibt.jetzt@linus:schreibt.jetzterr08:40:31
@linus:schreibt.jetzt@linus:schreibt.jetztnarinfos*08:40:32
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgoh08:40:36
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgthat's a good idea08:40:39
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgwhoops08:40:40
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgtoo late :P08:40:44
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgmight change that later08:40:56
@linus:schreibt.jetzt@linus:schreibt.jetztfrom my experience, an all-HDD binary cache is pretty painful08:41:48
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgI didn't realize accessing narinfos was such a burden08:42:32
@linus:schreibt.jetzt@linus:schreibt.jetztbut if you have a special device on your zpool and set special_small_blocks you can get your narinfos on the SSD within the pool08:42:52
@linus:schreibt.jetzt@linus:schreibt.jetztwith the bonus of getting small nars on the SSD too08:43:01
@linus:schreibt.jetzt@linus:schreibt.jetzt
In reply to @elvishjerricco:matrix.org
I didn't realize accessing narinfos was such a burden
lots of small files access, lots of very random access. Worst performance case for HDDs ^^
08:43:38
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgI do wish I had a special device in this pool. And I have the hardware for it (yay optane). But I've been planning on rebuilding the pool for a while and planned on adding them then08:44:02
@elvishjerricco:matrix.org@elvishjerricco:matrix.org
In reply to @linus:schreibt.jetzt
lots of small files access, lots of very random access. Worst performance case for HDDs ^^
Yea I just didn't realize narinfos would be a significant amount of the IOPS necessary to serve a binary cache
08:44:59
@linus:schreibt.jetzt@linus:schreibt.jetzt
In reply to @elvishjerricco:matrix.org
I do wish I had a special device in this pool. And I have the hardware for it (yay optane). But I've been planning on rebuilding the pool for a while and planned on adding them then
why only then? ^^
08:45:26
@elvishjerricco:matrix.org@elvishjerricco:matrix.orgBecause I didn't know I'd have a legit use for it this very night :P08:45:44
@linus:schreibt.jetzt@linus:schreibt.jetzt:D08:45:49

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