The document provides an overview of MongoDB, emphasizing its features as a document store that supports complex data structures and scalability through replication and sharding. It highlights key administration tasks, including the lack of schemas, the importance of indexing, and the need for monitoring and backup in managing multiple servers. Additionally, it discusses the MongoDB Management Service, which offers web-based monitoring, automation, and backup solutions for both cloud and on-premises environments.

1. Ops Jumpstart: Admin 101
André Spiegel
Consulting Engineer
MongoDB

2. 2
0 – 100 in 45 mins
1) What is MongoDB?
2) What's so special
about administering it?

3. What is MongoDB?

4. 4
db-engines.com/ranking

5. 5
{
"name" : "James Bond",
"age" : 42,
"address" : [
{ "city" : "London",
"country": "UK"
},
{ "city" : "Nassau/Bahamas",
"country" : "US"
}
]
}
Storing Documents: JSON

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db.persons.find ({ "name" : "James Bond" })
db.persons.find ({ "age" : { "$gt" : 40 } })
db.persons.update ({ "name" : "James Bond" },
{ "$inc" : "age" })
Expressive Query Language

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Replication
PRIMARY
SECONDARY SECONDARY
DRIVER
APPLICATION

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Sharding
SHARD
0
SHARD
1
SHARD
2
SHARD
3
ROUTER
mongos
DRIVER
APPLICATION
C
C C

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Sharding & Replication
ROUTER
mongos
DRIVER
APPLICATION
C
C C
P
S S
P
S S
P
S S
P
S S

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MongoDB in a Nutshell
• A document store: more complex data than relational
• Query language is just about as expressive as SQL
• Much greater focus on scalability
– replication (high availability)
– sharding (volume and throughput)

11. What's so special
about administering it?

12. 12
DBA Tasks for MongoDB
• There are no schemas
• Indexes are more important than in relational DBs
• Responsibility for security
• Likely dealing with a lot of servers
– monitoring
– backup
– deployment

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MongoDB Management Service
• Comprehensive, web-based management solution
– modules for monitoring, backup, automation
• MMS (in cloud)
– we run it for you
– enhances interaction with MongoDB tech support
• OpsManager (on prem)
– you run it yourself
– all under your control, nothing leaves your network

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Monitoring

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Backup
• Registers itself as a hidden replica,
works cluster-wide
• Snapshot every six hours,
plus oplog, thus
point-in-time restore
• Requires 3-4x original storage for typical retention policy
• Can do 100s of GB/day over the net
• On-prem version available for enterprise customers

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Automation
• Deploy, configure and control
MongoDB on your own hardware
• Create complex configurations
with dozens, hundreds of servers
in seconds
• Orchestrate complex tasks such as version upgrades,
change of storage engine
• Each server runs an autonomous automation agent

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Summary
• Paradigm shift in databases is happening
• MongoDB is extremely attractive to modern application
development: complex data structures, huge volume
• For DBAs, some things are different, some things stay
the same: no schemas, but many servers
• Know as much as you can!

20. Thank you.
Questions?