!

AWS Chicago User Group !

Big Data Day

Have an idea for a meetup? Talk to me: !Margaret WalkerCohesiveFT !!Tweet: @MargieWalker #AWSChicago

Sponsors & Hosts

#AWSChicago

6:00 pm Introductions 6:05 pm Short Talks !"AWS Storage Options" Ben Blair, CTO at MarkITx @stochastic_code !"APIs and Big Data in AWS" - Kin Lane, API Evangelist @kinlane !"Democratizing Data Analysis with Amazon Redshift" - Bill Wanjohi @billwanjohi and Michelangelo D'Agostino @MichelangeloDA, Civis Analytics !

6:45 pm Q & A 7:00 pm Networking, drinks and pizza

Agenda

#AWSChicago

Sponsors & Hosts

Next Meetups:

October 15? !

+Nov 12Let’s drink at re:Invent

Keep it Secret, Keep it Safe

(and Fast and Available would be nice too)

HiBen Blair

CTO @ MarkITx We live on AWS

TL;DW

• Use IAM roles for access control

• Use DynamoDB for online storage & transactions

• Use Redshift for offline storage & analysis

• Use S3 to keep *everything*

It’s hard to keep a secret

Use AIM EC2 roles instead

3rd normal form, anyone?

Data duplication is OK Optimize for each context

Interactive Data goes in DynamoDB

If your users read or write it, and it’s not huge, it should probably go into DynamoDB

Why DynamoDB

• Works with tests. Tests are good.

• Predictable Performance & Cost

• Low Maintenance

Why Not DynamoDB

• Vendor lock-in vs Cassandra

• Can’t add / change indexes (but that’s ok)

• Need to watch utilization

SimpleDBNo, just no

ElastiCacheGood place to end, bad place to start

RDSHosted SQL Goodness

RedshiftSeriously wonderful

Redshift vs RDS

• Start with RDS

• Redshift is actually very cheap

• RDS for simple reporting on small data sets

• Redshift for all other analysis

S3Store Everything.

!You won’t, and you’ll regret it later.

EBSDistributed Availability > Instance Recovery

Names MatterDistributed systems care about your keyspace even

when you don’t

Thanksben@markitx.com

!@stochastic_code

!github.com/markitx

"APIs and Big Data in AWS" Kin Lane API Evangelist !

@kinlane !Click here for slides on GitHub

#AWSChicago

Sponsors & Hosts

Democratizing Data Analysis with Amazon

Redshift

Michelangelo D’Agostino - Civis Analytics Senior Data ScientistBill Wanjohi - Civis Analytics Senior Engineer

● advantages of Redshift● some pitfalls● workflows and recommendations on best

practices

What you’ll learn

Why should you listen?● 18 months of heavy Redshift use● Two complementary perspectives:

The Scientist and The Engineer

Michelangelo @MichelangeloDA

Bill @billwanjohi

● collaborated on monolithic Vertica analytics database

● dozens of TB of data● scaled from 4-20 server blades● dozens of concurrent users across

departments (hundreds total)● arbitrary SQL allowed/encouraged

Life before Redshift

Our early requirements

● SQL language● low starting cost● easy to integrate with OSS, other DBs● performant on large data sets● minimal database administration

Choosing Redshift

● timing: first full release in Feb 2013● drastically cheaper to start than other

commercial offerings● very similar to our previous choice, HP

Vertica● many fewer administration tasks

Basics● RDBMS● MPP/Columnar

Supports window functionsFew enforceable constraintsNo concept of an index

● Redshift <= ParAccel <= PostgreSQL 8Postgres drivers workORM requires mocking

● Most data I/O via S3 service

Things analytics DBs are good at

● Big aggregates● Parallel I/O● Merge joins between tables

Things they’re not good at

● Updates● Retrieval of individual records● Enforcing data quality

How’s it worked out?

Pretty good!● adequate performance

○ big step up from traditional RDBMS○ comparable to other analytics DBs

● easy to stand up new clusters● cheaper clusters now available● most workflows can live entirely in-database● s3 is a good broker for what can’t

Data Science Workflow

Our custom plumbing syncs tables from dozens of source databases into Redshift at varying refresh frequencies.

We’ve found that SQL just invites so many more people to the analytics game.

Analysts and data scientists run exploratory SQL and build up complex tables for statistical modeling一utilizing crazy joins, aggregates and rollup features.

Redshift supports powerful window functions

Data Science Workflow

Predictive Modeling

Data is pulled directly from Redshift into python/R to train statistical models

Predictive ModelingFor simple linear models, scoring is done directly in redshift via SQL.

For more complicated models, data is pulled from redshift to s3 with a COPY SQL command, processed in EMR, and loaded back into redshift with another COPY command.

Hurdles we’ve faced along the way● inconsistent runtimes● catalog contention● bugs (databases are hard)● resizing● too easy to end up with uncompressed data● “missing” PostgreSQL functionality● complex workload management

Setup Recommendations● at least two nodes● send 35-day snapshots to other regions● at-rest encryption● enforce SSL● provision with boto or AWS CLI● cluster isolation to hide objects● buy 3-year reservations

We’re Hiring!

Through research, experimentation, and iteration, we’re transforming how organizations do analytics. Our clients range in scale and focus from local to international, all empowered by our individual-level, data-driven approach.

civisanalytics.com/apply