Packaging/BuildScores

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Launchpad Help > Packaging > Prioristing builds

Prioritising builds

When you upload a source package to Launchpad, it assigns the package a priority and then uses the priority to decide when the package should be sent to Launchpad's build-farm.

Launchpad calculates the priority of the build based on its attributes. We call this the build's "score". The higher the score, the sooner the build is dispatched to one of the available build machines.

There are separate build queues for distributions and PPAs.

How Launchpad calculates the score

Launchpad uses the following attributes of a package to calculate its priority:

The build score is the sum of all the scores that Launchpad awards the build for each of these criteria.

Target pocket

Launchpad gives a higher score to builds depending on the importance of their target pocket.

Pocket

Score

-proposed

0

-backports

1500

<release>

3000

-updates

4500

-security

6000

Target component

Launchpad gives a higher score to builds depending on the importance of their target component.

Component

Score

multiverse

0

universe

250

restricted

750

main

1000

partner

1250

Source urgency

A packager can specify the urgency of their source package. Launchpad takes this into account.

Urgency

Score

low

5

medium

10

high

15

emergency

20

Time in queue

Rather than allow low priority packages to linger in the queue for too long, Launchpad increases a build's priority according to its age.

Age [in seconds]

Score

300

5

900

10

1800

15

3600

20

7200

50

14400

100

Archive privacy

Builds destined for private PPAs are given a higher priority.

Privacy status

Score

public

0

private

10000

Other

Builds targeted to copy archive get a fixed score of 4, so even the least prioritized build will be dispatched before anything from COPY archives.

Builds for sources targeted to the 'transalation' section get a fixed score of 0, meaning they will be processed only when there isn't anything else in the queue.

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