emerge --sync takes a while to verify .tmp-unverified-downlo

asaparov · n00b Joined: 04 Nov 2016 Posts: 7

I've noticed emerge --sync on one of my machines takes a lot longer than the others, and almost all of the time is spent in Verifying /usr/portage/.tmp-unverified-download-quarantine.
It takes about a couple minutes to finish this step, whereas running

mike155 · Posted: Thu May 30, 2019 10:58 pm Post subject:

You could disable tree verification. That's what I do on my machines to speed up 'emerge --sync', especially on slow machines or on machines where /usr/portage is mounted via NFS.

Emerge portage without USE flag 'rsync-verify' AND
Add the lines below to the DEFAULT section of /etc/portage/repos.conf/gentoo.conf:

Code:

sync-rsync-verify-metamanifest = no
sync-allow-hardlinks = no

eccerr0r · Posted: Thu May 30, 2019 11:32 pm Post subject:

Tree verification needs to verify the whole tree. I've found mechanical hard disks take much longer to sync because it needs to copy/link the whole tree to a different directory (depend on COW), sync in from remote repo, verify, and then sync to your normal portage tree.

So yes, it's quite a few cycles for your SSD too that you don't notice since it's quite fast.

Some people have enough RAM to copy the whole portage tree to ramdisk/tmpfs, wonder if this should be the better optimization, though hard links are fairly quick too (COW)...
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