buildbot / buildbot/buildbot

Improve buildslave reconfiguration

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feature worker
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Description

This ticket is a migrated Trac ticket [3209](http://trac.buildbot.net/ticket/3209)

People contributed to the original ticket: @djmitche
Ticket created on: `Feb 22 2015`
Ticket last modified on: `Feb 22 2015`

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As of https://github.com/buildbot/buildbot/pull/1544, when a master is reconfigured it un-configures *all* of its buildslaves, then reconfigures the new set. This means extra un- and re-configuration of buildslaves where nothing has changed, so it's quite a bit of extra noise.

The fix for this is to calculate exactly what has changed, and only un-configure and configure the removed and added buildslaves, respectively.

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