[Toolserver-announce] s4 replication lag

[River Tarnell]

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Hi,

There was ~1.5 hours of replication lag on s4 (commons) on all servers, 
starting around 1600h UTC, because Wikimedia upgraded the s4 master to MySQL 
5.1, and trainwreck (our replication tool) does not understand the 5.1 binlog 
format.  I have now added support for this format, and replication has 
restarted.

	- river.
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