Last modified: 2014-04-28 21:27:57 UTC

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Bug 60058 - implement master-slave DB for beta labs
implement master-slave DB for beta labs
Status: RESOLVED FIXED
Product: Wikimedia Labs
Classification: Unclassified
deployment-prep (beta) (Other open bugs)
unspecified
All All
: Normal enhancement
: ---
Assigned To: Nobody - You can work on this!
:
Depends on:
Blocks: 51494 57583
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Reported: 2014-01-14 23:09 UTC by spage
Modified: 2014-04-28 21:27 UTC (History)
7 users (show)

See Also:
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Mobile Platform: ---
Assignee Huggle Beta Tester: ---

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Description spage 2014-01-14 23:09:01 UTC 
The beta cluster is intended to be "close" to production for testing purposes, but it does not use a master-slave DB configuration. This means that some cache and database bugs aren't caught in testing on beta labs, e.g. bug 59884.

It would be useful if beta labs had a similar master-slave DB setup, especially if we introduced significant lag time in slave updates.  Easier said than done :-)
Comment 1 Erik Bernhardson 2014-01-14 23:43:55 UTC 
setting the lag is fairly trivial,  percona makes a tool for it called pt-slave-delay.
Comment 2 Sam Reed (reedy) 2014-04-28 16:03:14 UTC 
(In reply to Erik Bernhardson from comment #1)
> setting the lag is fairly trivial,  percona makes a tool for it called
> pt-slave-delay.

(In reply to spage from comment #0)
> It would be useful if beta labs had a similar master-slave DB setup,
> especially if we introduced significant lag time in slave updates.  Easier
> said than done :-)


Bug 57583 requests the lags specifically...
Comment 3 Sam Reed (reedy) 2014-04-28 16:43:06 UTC 
Currently doing this!
Comment 4 Sam Reed (reedy) 2014-04-28 20:23:37 UTC 
We has a slave!
Comment 5 Antoine "hashar" Musso (WMF) 2014-04-28 21:27:57 UTC 
Thank you Sam!
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