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Re: Combining Guix, direnv and Emacs for environment customisation

From: Ricardo Wurmus
Subject: Re: Combining Guix, direnv and Emacs for environment customisation
Date: Wed, 07 Jun 2017 13:01:59 +0200
User-agent: mu4e 0.9.18; emacs 25.2.1

Roel Janssen <address@hidden> writes:

> The NFS overhead is pretty large.  Maybe we can better tune it, and if
> so, document how to tune it for GNU Guix.  I already talked to our
> storage expert, and tuning boils down to using fast disks, a
> large-enough NFS cache, and low-latency network equipment.

We may get a faster NFS share soon (with some of the slow storage
settings disabled), but I don’t hold my breath when it comes to NFS

> The reason we have /gnu NFS-mounted on the build node is that we can
> then very easily replace the node when it would have a hardware failure,
> without even losing the ability to run programs that were already
> installed.

That’s the same reason I have for keeping /gnu on NFS.  I have been
experimenting with lsync (writing to local disks and then pushing
changes asynchronously from local-gnu to remote-gnu), but I wasn’t
convinced it would be reliable.

I’m not sure if this would help, though, when the nodes keep mounting
/gnu over NFS.

Is there a way to put /gnu on a Samba share instead?  I’d like to give
that a try, but I’m not sure about what would happen to ownership and
permissions (I don’t worry about hardlinks because I disabled


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