How to speed up the 'emerge -pv xxxx' ????

[leiking]

Using sqlite is seems to be nouseful.

Any other method?

[shazam75]

Hi
This may help you :

http://en.gentoo-wiki.com/wiki/Portage_ ... llel_fetch

Regards
Shelton

[ppurka]

The OP's question has nothing to do with parallel fetch!

AFAIK, there is no nice way to speed up "emerge -p". If you have lots of ram, then maybe putting /usr/portage (without /usr/portage/distfiles) and portage's cache (can't remember where it is kept) on ram can get rid of the disk access times. If you simply need to check out the USE flags or the version of a package that is likely to be emerged, without its dependencies, then you can try out eix.

[leiking]

Any detail ? thanks.

[ppurka]

Any detail ? thanks.

You can try something similar to this: http://forums.gentoo.org/viewtopic-t-296892.html , though the procedure there is quite complicated. Although I haven't tried it myself, the procedure should be something like this:

1. Ensure you have DISTDIR in /etc/make.conf as either something other than /usr/portage/distfiles, or you have it symlinked to some other directory. Example when you haven't changed the DISTDIR variable:

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   mv /usr/portage /opt/portage # portage directory is /opt/portage for permanent storage
   mv /opt/portage/distfiles /opt/distfiles # we move the distfiles directory on to /opt
   ln -s /opt/distfiles /opt/portage/distfiles # actual distfiles are in /opt/distfiles now so we simply do a symlink
   mkdir /usr/portage # we create an empty /usr/portage which will be used for mounting onto ram

2. Mount a ramdisk on to /usr/portage.

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   mount -t tmpfs -o size=400m tmpfs /usr/portage

   You can probably also use zram for a compressed portage and mount a smaller sized ram disk.
3. Sync portage from /opt/distfiles on to /usr/portage. You can either use tar or use rsync. Note the trailing '/' in the /opt/portage/ -- this means that the contents inside /opt/portage will be copied and not /opt/portage directory itself

   Code: Select all

   rsync -a --delete /opt/portage/ /usr/portage

4. Now your portage is on RAM and the distfiles are on disk.
5. Before unmounting /usr/portage, sync it back to disk (in case you have run emerge --sync)

   Code: Select all

   rsync -a --delete /usr/portage/ /opt/portage
   umount /usr/portage

[dol-sen]

Well, the only true way to a faster pretend output is to emerge pkgcore, then use "pmerge -vp".

It runs to completion in less than half the time emerge does.