An Introduction j.mp/to-matsya 

Ashwanth Kumar Dev/Ops @ Indix Hindu Mythology Fan OSS Contributor ashwanthkumar.in 

Pre Presentation Poll 

Pre Presentation Poll How many are using / have used AWS? How many of those are using / have used Spot Instances? How many of those instances are used in Production (like) Environment(s)? 

AWS Spot Primer AWS is a Cloud provider of IAAS and PAAS They lease unused hardware at a lower cost as Spot instances No guarantees on how long they’re available Spot Prices are highly volatile But, highly cost effective if used right Spot’s “Demand vs Supply” is local to it’s Spot Market 

AWS Layout + Spot Market Primer 

US-East AWS Layout Primer - Regions US-West Singapore Tokyo 

AWS Layout Primer - Availability Zones I 1 I 2 I 3 I 4 us-east-1a I 1 I 2 I 3 I 4 us-east-1b I 1 I 2 I 3 I 4 us-east-1c Region - US East (North Virginia) 

AWS Layout Primer - Instances I 4 I 1 I 2 I 3 I 1 I 2 I 3 I 4 I 1 I 2 I 3 I 4 

For a cluster, the spot markets can be viewed in the following dimensions ● Instance Types, Regions and Availability Zones The number of spot markets is product of all the above numbers. Example - Requirement for 36 CPUs per instance ● Instances - [d2.8xlarge, c4.8xlarge] ● AZs - [us-east-1a, us-east-1b, us-east-1c, …] ● Region - [us-east, us-west, …] - 9 regions ● Total in US-EAST (alone) => 2 * 1 * 5 = 10 spot markets AWS Spot Markets 

Deep Dive github.com/ashwanthkumar/matsya 

You run Spot clusters to save on costs Clusters span across AZs to protect against Spot price fluctuations Results in HUGE data transfer costs ASG always try to evenly distribute the machines and doesn’t take cost into account Matsya - Motivation 

Goal - Always optimize for cost and keep the fleet running Scala app that monitors spot prices and moves the ASG to cheapest AZ Meant to be run as a CRON task Can fallback to OD (if required) Posts notifications to Slack when migrating Matsya 

How Matsya Works? 

How Matsya Works? ASG 

How Matsya Works? Spot ASG 

How Matsya Works? us-east-1a us-east-1c ... Spot ASG 

How Matsya Works? us-east-1a us-east-1c ... Spot ASG 

How Matsya Works? OD ASG us-east-1a us-east-1c ... Spot ASG (Optional) 

matsya { working-dir = “local_run” slack-webhook = “http://hooks.slack.com/services/foo/bar/baz” clusters = [{ name = “Staging Hadoop Cluster” spot-asg = “as-hadoop-staging-spot” od-asg = “as-hadoop-staging-od” machine-type = “c3.2xlarge” bid-price = 0.420 od-price = 0.420 max-threshold = 0.99 nr-of-times = 3 fallback-to-od = false subnets = { “us-east-1a” = “subnet-east-1a” “us-east-1b” = “subnet-east-1b” “us-east-1c” = “subnet-east-1c” } }] } Matsya - Configuration 

Deployed across the board for 2 months now Along with Vamana, enabled us to achieve ● ~50% of AWS Infrastructure is on Spot ● 100% of Hadoop MR workloads is on Spot Matsya at Indix 

Support for other Spot products - Spot Fleet and Spot Blocks More notification systems Multiple Region support Multiple Product support Minimum number of OD instances Work In Progress Questions? github.com/ashwanthkumar/matsya 

http://serverfault.com/questions/448746/ec2-auto-scaling-with-spot-and-on-demand-instances http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html https://aws.amazon.com/ec2/spot/bid-advisor/ References