Hi all,
My growing /gnu/store needed to be moved to another location. I couldn't
find any specific instructions on doing this but think I've managed to
cobble together a way of doing this safely without breaking store properties.
There were some gremlins tho - on restarting Guix the /gnu/store was
seen to grow to approximately double it's size.
I seem to have tamed this with the garbage collection, but would be interested
in people's thoughts if this is a reasonable way to do this, or if you
have any hints or gotchas I may have missed?
Stop all Guix services and mounts
systemctl stop guix-daemon.service
systemctl stop gnu-store.mount
systemctl status guix-daemon.service
systemctl status gnu-store.mount
Assuming that you have a /some_other_disk mount with more room:
mkdir /some_other_disk/gnu
rsync -va /gnu/store /some_other_disk/gnu/
Move the old store create the correct directory for the new
cd /gnu/store
mv store store.old
mkdir store
chmod 01775 store
chown root:guixbuild store
Change the Guix configuration file - /etc/systemd/system/gnu-store.mount -
under [Mount]:
What=/some_other_disk/gnu/store
Reload configuration and restart the daemon
systemctl daemon-reload
systemctl start guix-daemon.service
systemctl status guix-daemon.service
systemctl status gnu-store.mount
When you're sure everything looks good
rm -rf /gnu/store.old
Like I said this worked and guix pull/install/etc worked fine afterwards
- previous installs were recognized etc.
When I ran:
guix gc --verify
It returned success (0 ret code)
I noted however that the new /gnu/store was approx double in size - it
looked like it had created new links to represent store items.
I then ran:
guix gc --collect-garbage
This seemed to remove about half the size of the new store - suggesting
to me that stale links were now removed.
Is my method sane?
Is there a better way of doing such a move to avoid the doubling of size?
Thanks,
Phil
