Different states might have the same city name. You will need to probably change your projection to send more info through than just that first character. In this problem you will calculate the number of people who live in a zip code in the US where the city starts with a digit. Alternatively, you can put the url above into your web browser. You have a sharded system with three shards and have sharded the collections “students” in the “school” database across those shards. Now you will create the replica set. The project operator can extract the first digit from any field.

Following are presented the contents mp answers to the HomeWorks belonging. The documents look like this: Here you find updated answer with two possible outcomes as follow. There are hyperlinks from the post tags to the page that displays the 10 most recent blog entries for that tag. You can change the shard key on a collection if you desire.

Import it into your mongod using the following command from the command line: When you mongoimport the data, you will probably see a few homewprk key errors; this is to be expected, and will not prevent the mongoimport from working. You should not need to touch any other code. After this, the blog will work. Create three directories for the three mongod processes.

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m101p homework 6.2

Which of the following statements are true about choosing and using a shard key? The areas where you need to add code are marked with XXX.

Check all that apply. In this assignment you will use the aggregation framework to find the most frequent author of comments on your blog But you can, for fun.

There is also an issue with some versions of MongoDB 3. In this homework you will build a small replica set ,101p your own computer.

Isolate those queries and use explain to explore. The result should be Your email address will not be published. You will be using these file for this homework and the HW 3. You will need to probably change your projection to send more info through than just that first character.

There are one location.

MongoDB university m101p chapter 6 homework

Sunday, March 12, [Solution] Week 6: To get started, please download hwand Alternatively, you can put the url above into your web browser. Download the HW from the Download Handout link and uncompress it. The oplog utilizes a capped collection. Note that are three commands. 6. update that does not contain the shard key will be sent to all shards.

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m101p homework 6.2

Let us count the 6. of grades we have: Create three directories for the three mongod processes. MongoDB can not enforce unique indexes on a sharded collection other than the shard key itself, or indexes prefixed by the shard key.

mp – bigmongodb

The output of sh. On unix, this could be done as follows: Omit -p from mkdir. In this homework you will build a small replica set on your own computer.

In this homework you will be enhancing the blog project to insert entries into the posts collection. Since each document is one grade, it should nomework one document per student.

m101p homework 6.2

Note that are three commands. Type the following commands into the mongo shell: