scalable php

Scalable PHPCal Henderson

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Oh hai

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Does PHP scale?

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Yes!

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No!

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Stupid question!

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Languages don’t scale

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Architectures scale

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Universe of marshy force. Field senseshallows the hatchery saying Hello,. World!. Hydro. Power spring  sometimes; snowmelt      powers   snowmelt always.

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It’s all about the salmon

And trees

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But PHP sucks

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No namespaces

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Random function names

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No quantum superpositions

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People whining

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Best of a bad bunch

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Ok, scaling

What makes something

scalable?

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Bigger dataset

More traffic

Maintainable

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NOT about performance

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But PHP is slow!

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Who cares?

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PHP is not your

bottleneck

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More traffic

Push issues down the stack

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Horizontal

vs

Vertical

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Scale out

vs

Scale up

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Scale out (horizontal) ftw

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PHP sessions == bad

/var/notshared

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Sessions in a DB

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No sessions at all

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Sessions in cookies

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Bigger dataset

Not really a PHP issue

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Pass big data by

function foo(&$big){}

reference

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Don’t serialize()

big things

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All arrays are sparse

So that’s ok

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Don’t keep much in

memory

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Maintainable

Small logical blocks

include()

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Sucks about namespaces

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Classes are like namespaces

kinda

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Many includes == bad

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APC + full paths + nostat == awesome

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Set root path via

.htaccess ENV

Or whatever

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deploy-time rollups

also good

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Consistency

is king

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# Comments

# Also useful

# (who knew?)

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The bottom line:

PHP is used for

big things

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Beauty is lessimportant

Than just working

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Photos!• http://flickr.com/photos/isolano/423026153/• http://flickr.com/photos/liberato/171610084/• http://flickr.com/photos/thomashawk/422057690/• http://flickr.com/photos/puja/138469909/• http://flickr.com/photos/stuckincustoms/177496023/• http://flickr.com/photos/maurymccown/289932747/• http://flickr.com/photos/lij/122525716/• http://flickr.com/photos/thomashawk/44667887/• http://flickr.com/photos/mr_fabulous/2033276270/• http://flickr.com/photos/re_verse/58362878/• http://flickr.com/photos/auntiep/3990731/• http://flickr.com/photos/arild_storaas/966725616/• http://flickr.com/photos/magnesaxegaard/1351464888/• http://flickr.com/photos/hughes_leglise/530542920/• http://en.wikipedia.org/wiki/Image:John_McCarthy_Stanford.jpg

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Moar Photos!• http://flickr.com/photos/bonnieshulman/566022330/• http://flickr.com/photos/hamed/155343130/• http://flickr.com/photos/pandiyan/186171830/• http://flickr.com/photos/fish_at_taipei/198024832/• http://flickr.com/photos/cdell/472665280/• http://flickr.com/photos/robh/142742990/• http://flickr.com/photos/neilw/204239787/• http://flickr.com/photos/big-e-mr-g/152643684/• http://flickr.com/photos/ozyman/155517365/• http://flickr.com/photos/ucumari/580865728/• http://flickr.com/photos/twob/8741933/• http://flickr.com/photos/ashclements/248887492/• http://flickr.com/photos/mr-outdoorguy/2100813932/• http://flickr.com/photos/good_day/450356635/• http://flickr.com/photos/thomashawk/72597356/

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Even Moar Photos!• http://flickr.com/photos/dcjohn/74907741/• http://flickr.com/photos/carplips/439902567/• http://flickr.com/photos/bretarnett/180654760/• http://flickr.com/photos/bunchofpants/27151349/• http://flickr.com/photos/stuckincustoms/870325399/• http://flickr.com/photos/cruzan/84636294/• http://flickr.com/photos/cayusa/384187184/• http://flickr.com/photos/mrclean/371372515/• http://flickr.com/photos/radiofree/113944690/• http://flickr.com/photos/fortphoto/320676608/• http://flickr.com/photos/hurleygurley/4338767/

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