Scaling the synchronous web - Elaine Wherry

confidential scaling the synchronous web October 10 th , 2008

scaling the synchronous web October 10 th , 2008 confidential Elaine Wherry Co-Founder, VP Products Paul Sowden Lead Software Engineer

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traditional versus nontraditional... traditional versus nontraditional...

asynchronous versus synchronous ...

asynchronous versus synchronous ... page views versus persistence ... content versus application ... database versus memory ...

simpler is better
know your bottlenecks
quick fix or homerun
useful abstractions

#1: simpler is better

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confidential

#1: simpler is better
Don’t try to solve a scaling problem you don’t have (yet)
Build it as quickly and as inexpensively as possible
You want to save time to iterate upon other ideas in case this one doesn’t work
Setting yourself up for success – easier to optimize something you understand

#2 know your bottlenecks confidential

tools
strace
gdb
oprofile
httpanalyzer
monitoring

#2: know your bottlenecks
your type of app determines the type of scaling
don’t prematurely optimize
know system at different levels: oprofile, valgrind, gdb
know your bottlenecks: memory, cpu, bandwidth, storage, disk i/o
confidential

#3: quick fix or homerun! confidential

kill –9 <pid>

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#3: quick fix or homerun
users just want it to work (now)
use the time the quick fix affords you wisely
aim for small or big, avoid the middle
fix the root issue

#4: useful abstractions

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#4: useful abstractions
keep it simple, flexible, so you can adapt quickly to changes and scale with needs
abstractions allow you to reuse existing components to scale to new challenges
it’s hard to know where the useful abstractions are when you start a project

simpler is better
know your bottlenecks
quick fix or homerun
useful abstractions

today
3 years old
45 people (2 dogs)
35 million uniques per month
350 years worth of usage per day
200 million messages per day
54,000 kiss emoticons each day :-*
2.5 hour session length

thank you confidential

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Scaling the synchronous web - Elaine Wherry

by Carsonified Team on Oct 21, 2008

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Scaling the synchronous web - Elaine Wherry — Presentation Transcript