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To a thousand servers and beyond: scaling a mas...
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Nikolay Bachiyski
February 25, 2012
Programming
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1.5k
To a thousand servers and beyond: scaling a massive PHP application
Stories of abstraction and scaling WordPress.com. And what they have in common.
Nikolay Bachiyski
February 25, 2012
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Transcript
To 1000 servers and beyond Nikolay Bachiyski PHPUK 2012
http://extrapolate.me/ @nikolayb
None
None
None
Stinson Beach, July 2007
Budapest, Oct 2011
Jul, 2007 65MM Feb, 2011 800MM PV
2 stories
Story #1
Deep Pink Meet
Don’t like?
Beer Beheader =
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Abstraction
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Beer Theory
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Want to be better?
Get to know the abstraction below
Servers are below
Story #2 Scaling WordPress.com
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X
Deep Pink SAD
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X
Deep Pink SAD
None
None
Users Blogs Blogs
No joins :(
None
SELECT * FROM wp_users WHERE id=43315 SELECT * FROM wp_posts
LIMIT 10
HyperDB
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SELECT * FROM wp_users WHERE id=43315
Query parsing
add_db_table('user', 'wp_users') Dataset Table name
add_db_server('user', 0, 1, 0,
'db42.wordpress.com',…) Dataset Partition Read Write Slave
Failover X
Can work without
http://wordpress.org/extend/plugins/hyperdb/
None
None
C C C C
$count = wp_cache_get('posts', 'counts'); if ( false !== $count )
return $count; $count = $wpdb-‐>get_results($complex_query);
Output caching
10% 90% reads writes
C C C C
C C C C
Deep Pink SAD
Datacenter
C C sane sane
C C crazy sane Update
C C crazy sane Stale!
C C crazy crazy
Deploy
trunk/
Branch in code
~100 commits a day
~100 deploys a day
to ~1000 servers
One-click
None
Fast!
wpdev@nikolay:~$ deploy wpcom Going to update from 47127 to 47128
Syncing wpcom SVN Mirrors ORD (0s)... LUV (0s)... SAT (0s)... Deploying wpcom revision 47128 ORD (3s)... SAT (5s)... LUV (6s)... Revision 47128 successfully deployed (8s)
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Yeah, immediately!
Push to twitter
Push to Facebok
Stats
Spam checks
Index for search
Invalidate caches
Publish the post
ASYNC JOBS
None
$job_id = queue_async_job($data, 'encode_video');
Priorities
Deferred jobs
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PHP & MySQL
http://code.trac.wordpress.org/wiki/JobsDocs http://code.trac.wordpress.org/browser/jobs
Integration
Hacking
None