Hi Erik,

thanks for trying to make GitLab CI work again.

On Wednesday, April 17, 2019 at 3:46:44 PM UTC+2, E. Madison Bray wrote:
>
> Well it was hard to tell from the logs, but the main problem turned 
> out to be running out of disk space.  I don't know why--the worker 
> machines had 20GB each which you'd think should be enough, and that it 
> wasn't is something worth investigating in its own right. 
>

I wrote a comment in the `.gitlab-ci.yml` at some point that says

# * runners tagged as "gce" (Google Compute Engine) provide about 22GB of 
HDD  ,
#   a single core, 4GB of RAM. Since we are relying on OverlayFS, the disk
#   space is not sufficient to build sage from scratch.  

It seems that with overlayfs we need lots of disk space temporarily. I 
forgot about the details but I think it could be how the copy-on-write 
works that we basically need space for several copies of Sage's local/ 
directory. Anyway, requiring that much temporary disk space is probably 
nothing we can do much about in a docker setup easily.

julian

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