Hello,
I have noticed that when packing the image, we put quite a lot of pressure on the disks. Our main build VMs become quite slow and even slow down other machines like the web servers.
To avoid that, I have made a few changes:
/tmp is now a ramdisk and ccache is putting temporary files in there.
This helps a slot with smaller files that are written to disk or at least the journal.
When the OS tarball for the CDROM is generated, this is now done in memory and the OS is only written to disk again once. Saves us again a gigabyte or so in writes.
All other temporary files are moved into /tmp to take advantage of the ramdisk.
I do not expect any (significant) changes in build time, but if anything, it could only have gone up. There is no extra memory needed and the ramdisk is only enabled when enough memory is available.
But please let me know if you notice any changes.
Best, -Michael