Run MongoDB with Confidence using MMS

Kelly Stirman

#mongodb #mongodbdays

@kstirman

Director of Products, MongoDB

Operational Complexities

What is MMS?

MMS Monitoring

Topology

Charting

Alerting

Proactive Support

MongoDB offers Proactive Support for Subscription Customers. Our

engineers can monitor your deployment and make suggestions in

order to tweak for better performance or avoid doom.

MMS Backups

Disasters: All Shapes & Sizes

Disasters: Many Causes

Risks Are Everywhere

Storage failures

Power outages

Programmer error

Hardware failures

DC failures

Cyber attacks

Weather

Replication

• Redundant copies of your data across– Servers– Racks– Data Centers

• Automatic failover

• Tunable consistency minimizes risk

• However…programmer errors will replicate almost immediately!

Backups

Backing up data is one way to ensure availability and lower risk. They require active engagement, otherwise:

• Backups can be outdated

• Process can be slow (backup or restore)

• Isolated

• …but they are relatively inexpensive and do well at minimizing risk

MongoDB Backup Approaches

Mongodump File system MMS Backup

Initial complexity

Medium High Low

Confidence in Backups

Medium Medium High

Point in time recovery of replica set

Sort of ☺ No Yes

System Overhead

High Can be low Low

Scalable No With work Yes

Consistent Snapshot of Sharded System

Difficult Difficult Yes

MMS Maintenance Operations

The Process

• Applies to upgrades and most maintenance tasks

• Careful order of steps is critical– Especially in sharded clusters!

• For each shard/replica set– For each replica set member

• http://docs.mongodb.org/manual/tutorial/perform-maintence-on-replica-set-members/

Step 1 – Stop A Secondary

Step 2 – Restart As Standalone

Step 3 – Perform Maintenance

Step 4 – Restart As Member of Replica Set

Step 5 – Work on Primary Last

Demo

Operations

• Upgrade/Downgrade

• Add replica

• Add shard

• Remove shard

• Resize oplog

Resources

• MMS– mms.mongodb.com– mms.mongodb.com/help

• MMS On-Premise– Available for evaluation– mms.mongodb.com/help-hosted

Thank You

Kelly Stirman

#mongodb #mongodbdays

@kstirman

Director of Products, MongoDB