yum sync repos every time

[tessio]

I'm new with Fedora/Yum.. and I want to kill my self every time I ask yum to do something..
Why it need to sync the repos database every time? Fedora is not a rolling release distro, so the packages don't change so often.. only with minor updates..
For example: I have absolute certainty that emesene-1.6 is the same for the last 12 months, and I want to install it quickly.. what can I do to circumvent yum's obsession with repo syncing?

[DBelton]

well, You are wrong when you say that the packages don't change often. They are constantly updating packages in the repos so you want it to refresh and get the new versions.

But, you can change the length of time that yum keeps the metadata before it refreshes it if you wish.

Just edit the file /etc/yum.conf and uncomment the line for metadata_expire and put in the value you wish it to use. The default is 90 minutes. If it was me I wouldn't change it, though. I prefer to keep it up to date.

[kurtdriver]

If your package hasn't changed, just download it and then do a local install.

yumdownloader emesene

and then do,

yum localinstall emesene-1.6.rpm

[smr54]

yum -C will use cache only.

If you look in your /etc/yum.repos.d repo files, you will see that some have metadata_expire=7d meaning that some repos are only refreshed once a week.

I'm not sure which do and which don't. Probably updates refreshes each time. The standard fedora.repo though, only refreshes once a week.

Another thing you can do, depending upon your purpose (that is, if you're installing a particular package rather than checking for updates) is disable the non-used repos. For example, if you have fedora, fedora-updates rpmfusion, google, adobe and so on, you can always do something like
yum --disablerepo=* enablerepo=fedora install <my_package>

(You might have to use disablerepo=\*, I haven't done this in awhile.)