Dcamp ldn presentation

Telling your
Cumulonimbus from
your stratus and why it
matters (Clouds)

Alex McFadyen, CTO

drupal.org : a_c_m || drupal.org/user/195063
email : alex@demotix.com
twitter : @a_c_m

Introduction
Alex McFadyen
CTO of Demotix
Drupaler for 5 years 20 weeks

Demotix.com
A two minute (or less) introduction
http://prezi.com/_ugoyxm4qprv/demotixcom-2-minutes/

Drupal Camp London Saturday March 2nd, 2013
ALEX McFADYEN | alex@demotix.com | @a_c_m

Buzzword alert – CLOUD!!
To the world
“Cloud computing refers to the delivery of computing and
storage capacity as a service to a heterogeneous community of
end-recipients”
- http://en.wikipedia.org/wiki/Cloud_computing

To me (a Drupal dev)
“The cloud is just marketing gloss on quick to set up VPSs when
you need them, perhaps have 'unlimited' storage space and even
a CDN if your lucky”
- Me, just now.


Public health announcement

Why not just pay for it to be someone else’s problem
and not care about the “cloud”?

●
If you can. Do.
●
But perhaps you tried that and it didn't work :(
●
Complexity (doesn't fit generic solutions)
●
Policy / Control freak

“With great power comes great responsibility”
- Uncle Ben


Things to think about

@ Slice ratio (How big is your share?)

●
Most (not all) cloud providers slice servers up into equal
cpu/ram/disk space chunks and sell them off.
●
Some let you add on resources you need, others don't.
●
Problem for file servers.

@ Poor disk IO
●
Are your disks local or over the network?



@ More servers, more problems?
●
Once your past dedicated use servers (web, db etc) you
have to do work on the app to support more servers.

@ Support
●
Do you have any?
●
How about at 3am?
●
On Christmas day



@ Bad neighbours & overselling
●
Starts out great, then reddit moves in next door.

@ Cloud A != Cloud B
●
Disks, Slice ratio, network speed, location, management
systems etc


How to pick your cloud
@ Benchmarks?
●
http://cloudharmony.com cpu/ram/disk/web/db


Try, try, try again!
@ Try before you buy
●
Some companies will give you a free day/week.
●
Put as close as you can 1:1 copy of your current site on it
and...

@ Test, test and test some more
●
AB / Siege test your caching system not your app.
●
Instead replay your log files with HTTPERF or Jmeter.
●
Monitor the results with Munin/Cacti/Newrelic.


“The Clouds”
but not services

●
Amazon
●
Rackspace
●
Azure (Microsoft)
●
DediServe


My Kickstarter Benchmark
●
Demotix is not a good example.
●
So, using a popular distro instead.
●
Build duplicate machines with puppet
●
Benchmark with Blaze Meter
● Run jmeter in the cloud
●
Drupal module!
●
Very cool people (gave me a free account to help this talk)
●
Monitor with NewRelic (also free from BlazeMeter!)


How the servers were built
●
~4GB ram + what ever you get with
that
●
Puppet install :
https://github.com/a-c-m/puppet-drupal-lamp

●
20 line bash script (to install bits)
●
Thats it! (I promise)
●
Like the sound of that?
●
Go to “Vagrant: A crash course” @ 4:30pm


How the servers were tested
●
20 Urls from the store
●
7 unauthenticated users
●
7 authenticated users
●
10 min test, 160 second ram up
●
Run using our friends Blaze Meter
●
Graphed with NewRelic


Amazon EC2
● No free trial :( but pay by the hour.
● M1.Medium linux VPS = £62.65/mo
● 1 x Intel Xeon
● 3.7 GB ram
● 410 GB disk

● M1.Large (EBS-Optimized) linux VPS = £137.35/mo
● 2 x Intel Xeon
● 7.5 GB ram
● 850 GB disk

● Bandwidth, support etc is extra


Amazon EC2 M - BlazeMeter


Amazon EC2 M – app


Amazon EC2 M – server


Amazon EC2 L - BlazeMeter


Amazon EC2 L – app


Amazon EC2 L – server


Rackspace Cloud
●
No free trial :( but pay by the hour.
●
4GB linux VPS = £116.80/mo
●
AMD Quad-Core
●
4 GB ram
●
160 GB disk
●
Bandwidth, support etc is extra


Rackspace - BlazeMeter


Rackspace – app


Rackspace – server


Microsoft Azure
● 90 Days for free?!?
● 1 Medium linux VPS = £73.32/mo
● 2x AMD Opteron
● 3.5 GB ram
● 30 GB disk

● 1 Large linux VPS = £146.63/mo
● 4x AMD Opteron
● 7 GB ram
● 30 GB disk

● Smart interface
● Bandwidth, support etc is extra


Microsoft Azure M - BlazeMeter


Microsoft Azure M - app


Microsoft Azure m - server


Microsoft Azure L - BlazeMeter


Microsoft Azure L - app


Microsoft Azure L - server


DediServe
● Friendly / talk to them.
Gave me a free server to do this test.

● 2GB linux VPS = £66.41/mo
● 4x Intel Xeon
● 2 GB ram
● 50 GB disk
● 1.5 TB transfer

● 4GB linux VPS = £107.99/mo
● 8x Intel Xeon
● 4 GB ram
● 100 GB disk
● 3 TB transfer

● Managed Support is extra


DediServe 2GB - BlazeMeter


DediServe 2GB – app


DediServe 2GB – server


DediServe 4GB - BlazeMeter


DediServe 4GB – app


DediServe 4GB – server


Price VS average pageload
9000

8000

7000

6000
MS per page (average)

Amazon Medium
5000 Amazon Large
Rackspace 4GB
Azure Medium
4000 Azure Large
DediServe 2GB
DediServe 4GB
3000

2000

1000

0
£40.00 £60.00 £80.00 £100.00 £120.00 £140.00 £160.00

£ per month


Shameless affiliate link


Thank you
Questions?

Alex McFadyen, CTO

drupal.org : a_c_m || drupal.org/user/195063
email : alex@demotix.com
twitter : @a_c_m

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