M101JS HOMEWORK 6

Let’s see what Tamika Schildgen’s record looks like: When it says “user creation successful” and “user login successful”, you can Turn in your assignment. Which writes finished successfully, since some might still be buffered? 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. Change directory into hw1 Use mongorestore to restore the dump into your running mongod. The most interesting lecture was the one on MongoDB failover in the Node.

After you run the blog, you should see the message:. Do this by opening a terminal window mac or cmd window windows and navigating to the directory so that the dump directory is directly beneath you. The lectures started with explaining what replication is and how it works in MongoDB. 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. The final lectures of the course are about the way you scale horizontally in MongoDB. Newer Post Older Post Home. In this problem, you will be using an old weather dataset.

Don’t include their quiz scores in the calculation. You are commenting using your Twitter account.

m101js homework 6

If you have the mongodb driver installed correctly, this will print out the message ‘Answer: This involves calculating an average for each student in each class of all non-quiz assessments and then averaging those numbers to get a class average. To be clear, each student’s average should include m101jz exams and homework grades. You can read part five here.

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The shard key must be present in each document. Monday, November 21, [Solution] Week 6: By fast, we mean that indexes should be in place to satisfy these queries such m101jd we only need to scan the number of documents we are going to return.

Tag sets allow for advanced configuration of write concerns and read preferences by considering tags on nodes, more details are found in the documentation.

Assuming this document has the highest “Temperature” for the “State” of “Vermont” in our collection, the document should look like this after you run your program:.

[Solution] Week 6 : The Aggregation Framework : MJS: MongoDB for Developers

In this problem, you will be using an old weather dataset. Use mongorestore to restore the dump into your running mongod.

m101js homework 6

You are commenting using your WordPress. The database calls that you are going to add will add a new user upon sign-up and validate a login by retrieving the right user document. When it says “Correct amount of data documents.

The hoemwork interesting lecture was the one on MongoDB failover in the Node.

[Solution] Week 6 : The Aggregation Framework : MJS: MongoDB for Developers

There is also a ‘views’ directory which contains the templates for the project and a ‘routes’ directory which contains our express routes. The lectures started with explaining what replication is and homewor, it works in MongoDB. You are commenting using your Google account. You have really selected the suitable topic node. Other unique indexes are only unique on a shard.

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Hello from MongoDB!

Some students have three homework assignments, etc. Change directory into hw1 Use mongorestore to restore the dump into your running mongod.

Horizontal scaling is done by making shards of the collection that will be distributed over replication sets. Picking the shard key The best way to pick a shard key is to figure out the usage pattern of your data.

The first section, Lectureswill summarize what I learned from the videos and related examples. 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. This week concluded all the regular lectures, in week 7 there will be non-curriculum lectures and of course the final exams.

To find out more, including how to control cookies, see here: In that scenario secondary nodes will function as fail over. Sharding The final lectures of the course are about the way you scale horizontally in MongoDB.

m101js homework 6

You are commenting using your Google account. You are commenting using your WordPress. If you goto http: Note you will need to have your path m1011js correctly to find mongorestore.

Then you can iterate through the documents and know that whenever the state changes you have reached the highest temperature for that state.