What’s a cloud?

Platform as a Service

Infrastructure as a Service

Why a Cloud?

Running on the Cloud

Cloud servers are ephemeral

When they go away, so does your data

You need to plan to fail

You need to keep your data safe

Backup and Restore

Store it on S3 with Fuse & S3fs

Store it on S3 with PersistentFS

Store it on S3 with ElasticDrive

Elastic Block Store

• 1GB - 1TB persistent storage

• High Performance• Snapshot to S3 for

backup• $0.15/GB storage,

$0.10 per million I/O

Can only mount to a single instance

Amazon has different instance types

Bandwidth

• Network and disk usage is shared• Larger instance type provide more I/O• Based on our experience, a small instance has

1/3 to 1/2 the bandwidth of an XL

How can you offer high availability?

Similar to HA on hardware

If you have a single server...

when it dies, so does your site

So you need two of everything

You need enough to cover your traffic, plus one extra

Otherwise if it fails

On clouds this is easy

You need a heartbeat

Databases are special

Masters and slaves and replication

And where do you keep your /files?

Andwhathappenswhenyouhitthis?

Youneedtobuycapacityforthislevel

Andwhathappenswhenyouhitthis?

Youneedtobuycapacityforthislevel

Eventhoughmostofyourtrafficislikethis

Andwhathappenswhenyouhitthis?

Andwhathappenswhenyouhitthis?

World’s shortest sales pitch:

Oh, yeah. We offer it too.

Adam KalseyVP of Productsadam@workhabit.com866-WorkHabithttp://workhabit.com/