Mongodb For Dbas Homework Answers

Learn everything you need to know to administer a MongoDB installation in production. This course begins by assuming you have no experience with MongoDB, taking you through the basics of installation. Then you will learn about JSON and Mongo's extensive query capabilities through the Mongo shell. We will cover importing, and exporting data into Mongo. After that, we cover replication and fault tolerance. Then it is on to scaling out with MongoDB, including indexing, performance tuning, monitoring, and sharding. Finally, we cover backups and recovery. No prior experience with MongoDB is assumed for this course but a knowledge of administration of another database will be helpful.

After completing this course, you should have a good understanding as to how applications are built on top of MongoDB. This course should also prepare you to take the DBA certification associate exam. Register for next exam session to become a MongoDB Certified Professional.


Basic system administration skills. A working knowledge of relational database concepts is helpful but not required. Javascript is the shell language for MongoDB and rudimentary knowledge of that is also helpful, but not required.


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Friday, February 13, 2015

[Mongodb] M-102 Week 6 Assignments

---- 6.1
-- Stats sur la collections initiale
mongos> db.trades.stats()
 "sharded" : false,
 "primary" : "shard0000",
 "ns" : "week6.trades",
 "count" : 1000001,
 "size" : 244000240,
 "avgObjSize" : 243.999996000004,
 "storageSize" : 315006976,
 "numExtents" : 15,
 "nindexes" : 1,
 "lastExtentSize" : 84426752,
 "paddingFactor" : 1,
 "systemFlags" : 1,
 "userFlags" : 0,
 "totalIndexSize" : 32458720,
 "indexSizes" : {
  "_id_" : 32458720
 "ok" : 1
-- On retrouve le même nombre de document dans le shard car il est unique
mongos> homework.a()

---- 6.2
> 3

---- 6.3
> 2 (shards bien presents)

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