[Nix-dev] Nix 1.2 released

[Ludovic Courtès]

Hi!

Congrats on the release.  :-)

Eelco Dolstra <eelco.dolstra at logicblox.com> skribis:

>>>   * Store optimisation (replacing identical files in the store with hard links)
>>>     can now be done automatically every time a path is added to the store. This
>>>     is enabled by setting the configuration option auto-optimise-store to true
>>>     (disabled by default).
>> Any experience about performance? Why is it disabled by default?
>
> I had it enabled by default initially, but then I experienced some performance
> hit on one machine so I disabled it for now.  Didn't have time to investigate it
> more yet.

My experience is that ‘addToStore’ operations become quite
I/O-intensive, which can be slightly problematic on Hydra masters (there
are lots of copies back-and-forth between the master and slaves.)

OTOH, the benefits in terms of disk space seem appealing.

Thanks,
Ludo’.