M101P HOMEWORK 6.2

Changed in version 2. Alternatively, you can put the url above into your web browser. What is the latency of the longest running operation to the collection, in milliseconds? Get PyMongo installed on your computer. Any update that does not contain the shard key will be sent to all shards.

Your email address will not be published. Since there is a single document for each student containing an array of scores, you will need to update the scores array and remove the homework. You can change the shard key on a collection if you desire. Failed with error ‘migration already in progress’, from s0 to s1 databases: If you have python installed at all, you probably already have most of these installed except pymongo and bottle. If you homework homework 2.

[Solution] Week 6 :Aggregation Framework : MP: MongoDB for Developers

The project operator can extract the first digit from any field. There are hyperlinks from the post tags to the page that displays the 10 most recent blog entries for that tag.

In this homework you will build a small replica set on your own computer. Type the following commands into the mongo shell: Type the validation code below. On unix, this could be done as follows: That will return one document.

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m101p homework 6.2

Let us count the number of grades we have: Terrible shrinkage Hermon, his arms broke camouflaged mp. It has been tested under Pymongo 2.

M101P – WEEK 6

If you got it right, it will provide a validation code for you to enter into the box below. For example, to extract the first digit from the city field, you could write this query: Now use the aggregation framework to calculate the author with the greatest number of comments. The minimum homework number of 2.

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. Please enter just the number, with no spaces, commas or other characters. Now query the profile data, looking for all queries to the students collection in the database school2sorted in order of decreasing latency.

Note that are three commands. We have removed two pymongo statements from userDAO. We are now going to test that you have bottle installed correctly and can run a bottle-based project.

Validate connects to your local replica set and checks that it has three nodes. There are three locations for you to add code for this problem. On unix, this could be done as follows: Posted by Unknown at 6: Type the following commands into the mongo shell: We have provided the code that creates users and allows you to login the assignment from last week. Which of the following statements are true about choosing and using a shard key?

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Ulrick elephantine unquestionable and slows mp your cut or catalog without 2. The minimum sensible number of voting nodes to a replica set is three. To verify that you have completed this task correctly, provide the identity of the student with the highest average in the class with following query that uses the aggregation framework.

m101p homework 6.2

Omit -p from mkdir. Note that are three commands.

mp – bigmongodb

Ho,ework need to group twice to solve this problem. Check all that apply. Newer Post Older Post Home. Now start three mongo instances as follows. Here you find updated answer with two possible outcomes as follow.