koji chain-build usage

[Mike Bonnet]

On 02/26/2010 03:14 PM, Doug Reiland wrote:
> ok, I just seem to be waiting for createrepo alot.
> Making very slow progress in package builds.

Is that because you only have one builder, and its busy processing
newRepo tasks instead of build tasks?  The simple answer is to add more
builders.

The only time you should be waiting for repo regens is if your package
depends on a previously-built package.  In that case chain-build or
scripting up something using wait-repo is the best option.

> On Fri, Feb 26, 2010 at 2:27 PM, Mike Bonnet <mikeb at redhat.com> wrote:
>> On 02/26/2010 02:15 PM, Doug Reiland wrote:
>>>>
>>>> You can emulate chain-build with a series of build and wait-repo
>>>> commands if you like.
>>>>
>>>
>>> I want to be able to improve build throughput.
>>>
>>> Is the following valid approach?
>>>
>>> koji build --skip-tag mytag srpm1 srpm2 ....
>>> after done
>>> koji tag-pkg mytag pkg1 pkg2 ....
>>> koji regen-repo ...
>>
>> I think you're assuming that a repo-regen will block other builds from
>> taking place.  That's not the case.  A build will use the most recently
>> created valid repo for the tag.  Other builds can go on while a repo is
>> being regenerated.  When the repo regen is complete, it will be marked
>> as the new latest repo, and any builds submitted after that will use the
>> new repo instead of the old.  Using --skip-tag doesn't improve
>> throughput at all over using chain-build or wait-repo in between
>> (dependent) builds.
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