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NixOS Infrastructure

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21 Aug 2025
@vcunat:matrix.orgvcunat(though not trivially at least)15:53:34
@rosscomputerguy:matrix.orgTristan RossIf the infra team doesn't have physical access but the hardware team does, is that acceptable for trust?15:53:55
@k900:0upti.meK900 Would not be great 15:54:38
@k900:0upti.meK900But also, again, I want to first see proof that there's enough hardware15:54:38
@k900:0upti.meK900 And that there's enough demand to justify the Hydra costs 15:54:43
@rosscomputerguy:matrix.orgTristan RossWhat sort of costs does it make on Hydra? Is it just eval and storage?15:55:56
@k900:0upti.meK900 Queue runner is slow 15:56:35
@emilazy:matrix.orgemilycache for the entire jobset on a new platform is substantial (since we pay the whole cost every staging cycle)15:56:40
@k900:0upti.meK900 Queue runner slowness scales with number of jobs 15:56:44
@emilazy:matrix.orgemilyand Hydra scheduling is a bottleneck15:56:53
@k900:0upti.meK900 Storage is also still questionable 15:56:59
@k900:0upti.meK900 Eval is largely not an issue 15:57:06
@emilazy:matrix.orgemilyI think it would make sense to prove this externally first15:57:12
@emilazy:matrix.orgemilywith a separate Hydra15:57:23
@emilazy:matrix.orgemilyand see if the hardware can even keep up15:57:33
@rosscomputerguy:matrix.orgTristan RossOk, I'll take this back to the HW team and discuss things more.15:57:42
@emilazy:matrix.orgemily the bottleneck right now is x86_64-darwin which I suspect is substantially faster than the best RISC-V hardware 15:58:10
@dramforever:matrix.orgdramforeveri think risc-v hydra for nixpkgs is "no"16:02:43
@dramforever:matrix.orgdramforeverbut we could have machines for y'all to play with16:02:58
@joerg:thalheim.ioMic92 @hexa:lossy.network: is it queue runner or infra week? 16:03:18
@hexa:lossy.networkhexa (signing key rotation when)infra, but I have another duty to attend to16:03:36
@jfly:matrix.orgJeremy Fleischman (jfly)infra16:03:40
@hexa:lossy.networkhexa (signing key rotation when)please talk about the state of the union slides16:03:41
@hexa:lossy.networkhexa (signing key rotation when)we need them done in time for nixcon16:03:49
@jfly:matrix.orgJeremy Fleischman (jfly)can you share them with jeremyfleischman@gmail.com?16:04:05
@joerg:thalheim.ioMic92No one in the jitsi anyway 16:04:30

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