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Ops Skills and Tools for Beginners [#MongoDB World 2014]

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Rainforest QA
Rainforest QA

Originally presented at MongoDB World 2014. This is an introduction to Ops with MongoDB aimed at Developers and people who haven't run MongoDB in production before. It covers some basics of servers, hosting, installation, monitoring and backups.

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rainforest @rainforestqa Ops Skills and Tools for Beginners
Russell Smith ! English guy Mongo DB Master Ex Ops consultant Ruby / PHP developer YC S12 Alum Using mongo in Prod since 1.6/1.8
@rainforestqarainforest Rainforest QA ! Insanely simple testing checkout: www.rainforestqa.com
What is Ops?
@rainforestqarainforest Setting up servers / services
@rainforestqarainforest Supporting Engineers
@rainforestqarainforest Keeping stuff running
@rainforestqarainforest Avoiding disasters
@rainforestqarainforest Fixing breakage
Lets Learn the basics
Installation
@rainforestqarainforest Replicated
@rainforestqarainforest Sharded
@rainforestqarainforest Best practices Ubuntu is simplest Install from Mongo’s repo Chose the right replica set size: 3 nodes Never use 32 bits
@rainforestqarainforest Alternatives MongoHQ MonogLab ObjectRocket MMS + AWS (via automation)
Monitoring Mongo
@rainforestqarainforest Server components
@rainforestqarainforest Storage magnetic, ssd metric: disk io
@rainforestqarainforest Memory / RAM fastest general store metrics; free, swap usage
@rainforestqarainforest Network allows communication use 1gbit or higher (avoid 100mbit) metrics; latency, throughput
@rainforestqarainforest CPU more is better mostly used metrics; % usage
@rainforestqarainforest Monitoring & Diagnostics
@rainforestqarainforest Top things to monitor Failover events Repl Lag Connections Lock % Disk usage
@rainforestqarainforest Hosted is Simplest
MMS Hosted, free for monitoring ! Also can do Backups Automation
Scout Monitors mongo, servers and many others (Plugins!) ! non-free
Server Density Monitors mongo, servers and many others (Plugins!) ! non-free
@rainforestqarainforest Opensource options Ganglia Munin Nagios Zabbix
Linux tools to learn mongostat / mongotop top iostat vmstat netstat
@rainforestqarainforest Mongo shell rs.conf() rs.status() db.serverStatus() db.stats() db.currentOp()
@rainforestqarainforest Backups
@rainforestqarainforest Backup options mongodump from the file system LVM / EBS MMS
@rainforestqarainforest TEST YOUR BACKUPS
Common pitfals
Missing indexes! Running out of disk space Untested backups Sharding too late / wrong key un-replicated / even set size
@rainforestqarainforest Conclusion do backups monitor read the docs
rainforest @rainforestqa Questions? @rainforestqa @rhs

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