all data everywhere

MySQL replication

(all data everywhere; is it a good idea?)

sarah novotny –sarah@bluegecko.net MySQL and LAMP services

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①master/slave②master/relay slave/slave③active/passive multi-master④active/active multi-master⑤rings⑥rings + reporting spurs + hot

standbys + relay slaves + read slaves, oh my

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①master/slave

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READ ONLY

② Master/relay slave/slave

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READ ONLY

READ ONLY

③active/passive multi-master

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READ ONLY

③active/passive multi-master

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READ ONLY

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④active/active multi-master

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read/writeread/write

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And now we come to rings

⑤rings

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read/write read/write

read/writeread/write

⑥ oh, my

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⑥ oh, my

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Boston ->

London ->

DC ->

Seattle ->

⑥ oh, my

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Boston ->

London ->

DC ->

Seattle ->

⑥ oh, my

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n

n application servers

writable ring

readable spokes

⑥ oh, my

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n application servers

writable ring

readable spokes

⑥oh, my

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⑦challenges⑧good things⑨why 5.0 still⑩tools

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⑦challenges

when things go wrong, they go very, very wrong

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⑦challenges

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datadrift

⑦challenges

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application servers in one datacenter may have different data than anotherfor some amount of time

⑦challenges

scaling writes

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⑧good things

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never a dullmoment

⑧good things

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nearly infiniteread scaling

⑧good things

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4 (usually) identical copies of data

⑧why 5.0 still?

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replicationbugs

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⑧why 5.0 still?

tools we use to managethis insanity—

InnotopmaatkitMySQL proxycacti templatesnagios

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credits

flickr• icons – timothymorgan• MySQL mints – jimwinstead• license plate – severud• vodka – masochismtango• 1 – sarahajohnson• arthur – sierratierra• drift – jarylcabuco• dull -- pagedooley• tools – meanestindian

other

• special thanks to unnamed staff from my unnamed client for suggestions on content and slides

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flickr• sadface – mlostracco• quadruplets – evilerin• reading – stevecadman• bugs -- bruneskine

Blue Gecko and contact info

• sarah@bluegecko.net• sarah.novotny@gmail.com• @sarahnovotny• @bluegecko• senk on #mysql

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Blue Gecko provides Remote DBA services for companies around the world

7x24x365 support including monitoring, performance analysis, proactive maintenance and architectural guidance for small and large datasets.