One of the many enhancements in Fedora 11 is delta RPMs. Delta RPMs are updates that contain only the updated files, rather than all files in the original RPM. This saves download time; nice if you’re updating over a slow internet connection. To use this feature; do this:
yum install yum-presto
Now, on your next update, any delta RPMS will be automatically detected and processed. Changed RPMs not supporting deltas will be downloaded in their entirety, just like old times. Both types are processed in the same invocation of yum update; in other words, it just works.
Output from my latest yum update:
Size of all updates downloaded from Presto-enabled repositories: 3.3M
Size of updates that would have been downloaded if Presto wasn’t enabled: 6.6M
This is a savings of 51 percent
Neat, eh?
-k-
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2 Comments
Speaking of RPMs, can any of us help you with putting together the calibre RPM you’d mentioned you were working on? Is it race ready yet?
Hey, that’s very cool!
I can’t mess much with my Linux laptop because I have a 3 hour tutorial to give at OSCON a month from now
but Yum-presto might just make me choose Fedora next time I do a clean Linux install.