> Both packages are compatible with older versions.<br><br>Can we use them in Fedora 17 too ?<br><br><div class="gmail_quote">2012/5/16 Zdenek Pavlas <span dir="ltr"><<a href="mailto:zpavlas@redhat.com" target="_blank">zpavlas@redhat.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
A new yum and urlgrabber packages have just hit Rawhide. These releases<br>
include some new features, including parallel downloading of packages and<br>
metadata, and a new mirror selection code. As we plan to include these<br>
features in RHEL7, I welcome any feedback or bug reports!<br>
<br>
python-urlgrabber-3.9.1-12.fc18 supports a new API to urlgab() files in<br>
parallel, and yum-3.4.3-26.fc18 can use this. Both packages are compatible<br>
with older versions.<br>
<br>
Feature list:<br>
<br>
- parallel downloading of packages and metadata<br>
<br>
If possible, multiple files are downloaded in parallel. (see below for the<br>
limitations that apply)<br>
<br>
- configurable 'max_connections' limit in yum.conf<br>
<br>
This is the maximum number of simultaneous connections Yum makes. Purpose of<br>
this is to limit local resources (number of processes forked). The default is<br>
to use urlgrabber's default value of 5.<br>
<br>
- mirror limits are honored, too.<br>
<br>
Making many connections to the same mirror usually does not help much, it just<br>
consumes more resources. That's why Yum also uses mirror limits from<br>
metalink.xml. If no such limit is available, at most 3 simultaneous<br>
connections are made to any single mirror.<br>
<br>
- new mirror selection algorithm<br>
<br>
The real downloading speed is calculated after each download, and the mirror's<br>
statistics get updated. These are in turn used when selecting mirrors for<br>
further downloads. This should be more accurate than measuring latencies in<br>
fastestmirror plugin, but slow mirrors now have to be tried from time to time,<br>
and the statistics need some time to build up.<br>
<br>
- ctrl-c handling<br>
<br>
This is a long-standing problem in Yum. Due to various shortcomings in rpm and<br>
curl it's impossible to react immediately to SIGINT. But now the downloader<br>
runs in a different process, so we can exit even if curl is still stuck.<br>
The "skip to next mirror" feature is gone (we don't want to restart all<br>
currently running downloads).<br>
<br>
Known limitations:<br>
<br>
- metalink.xml and repomd.xml downloads are not parallelized yet.<br>
<br>
<br>
--<br>
Zdeněk Pavlas<br>
<span class="HOEnZb"><font color="#888888">--<br>
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