Start a mongo config server: Facebook Twitter Envelope Url. November 18, March 10, Sonali. Add as “Interested” to get notified of this course’s next session. Your email address will not be published. In the previous weeks the focus was less on connecting to the database and directed more at making the code work for the homework assignment.
Start an initially empty mongod database instance. Anuj Singh 4 January at Thanks for sharing nice information. The final lectures of the course are about the way you scale horizontally in MongoDB. Teju Teju 30 October at Other unique indexes are only unique on a shard. Home Subjects Programming Databases. We have worked with many organizations of all the sizes.
When it comes to sharding, it will probably be about the shard key and the implications of using a particular key.
Overview Syllabus Related Courses Reviews. Connect to it with the shell and week6. First, a server is brought down for homewirk once a month. The last assignment was setting up the sharded environment, not much trouble with that because I knew it from my M course and the script was pretty much handed to me. Share your experience with other students.
You can confirm the above worked by running: In the second section, HomeworkI will mention what I learned from practicing the homework m1102 and anything I might have done extra because of it.
Replication The lectures started with explaining what replication is and how it works in MongoDB.
No prior experience with MongoDB is assumed for this course but a knowledge of administration of another database will be helpful. Add an arbiter 2. They are running a single replica set with two members. As a developer there are a few things you should know: Note to shard a collection, you must have an index on the shard key, so you will need to create the index first: In the previous weeks the focus was less on connecting to the database and directed more at making the code work for the homework assignment.
The shard key is part of an index.
Homweork is a wonderful course and that too free. They also explain that should they use a readPreference of “primaryPreferred”, that the application can read from the one remaining server during server maintenance.
Muhammad Abbas – ETL & BI Professional: [Mongodb] M Week 6 Assignments
Big Data Hadoop Online Course. Lectures I assumed the lectures would cover the different levels of write concerns on write operations and the read preferences on read operations in replicated environments. Add as “Interested” to get notified of this course’s next session. Facebook Twitter Envelope Url. I had no problem with the questions that asked how to ensure a certain persistence or which shard would be queried for a certain read operation.
M102: MongoDB for DBAs
In production you would almost always use three config servers and replica sets as part of a sharded cluster. How to homedork with a crash if the failover is still in progress? Sign up for free. Basic system administration skills. I assumed the lectures would cover the different levels of write concerns on write operations and the read preferences on read operations in replicated environments.