It was only an issue when running with multiple processes that need to communicate, such as in the topics covering Replica Sets and Sharding. MongoDB is “multi-master” — you can write anywhere, anytime. It contains 3 documents. How many documents do you have? October 31, March 10, Sonali. In this problem, ‘s oplog was effectively a “fork” and to preserve write ordering a rollback was necessary during ‘s recovery phase. Once you have eliminated the slow operation, run on your second tab:

My first introduction to MongoDB was to sign up to university. Check all that apply. This method will simply verify that this simple cluster is up and running and return a result key. Which of these statements is true? Then when you start your MongoDB processes they will function correctly.

Once done with that, run homework.

M102 WEEK 3

Next, go into the pcat database. Open command prompt and start MongoDB server Download handout and save as performance.

Once you have eliminated the slow operation, run on your second tab:. Which arrangement s of servers will allow you to be stay up as in, still able to elect a primary in the event of a failure of either data center but not both at once? It contains homewrk documents. How many documents do you have? Once you have it right and are ready to move on, ctrl-c terminate the shell that is still running the homework.


Add another data bearing node. Which of the following are true about mongodb’s operation in these scenarios? Once you have two secondary servers, both of which have sync’d with the primary and are caught up, run hkmework your primary: Based on the explain output, which of the following statements below are true?

Which of the following options will allow you to ensure that a primary is available during n102 maintenance, and that any writes it receives will replicate during this time? Start homewrk mongod server instance if you still have a replica set, that would work too.

MongodbChamps: M MONGODB FOR DBAS – homework

Homeworj Post Older Post Home. Most MongoDB queries involve javascript execution on the database server s. Reconfigure the replica set so that the third member can never be primary.

m102 homework 2.1

Next, download the handout and run: Instead of running it normally, you need to right-click and Run As Administrator. Check all that apply.


Keep the other shell with homework. Choose the best answer:. How many products have a voice limit? Once you have eliminated the slow operation, run on your second tab: This comes from how you start the Windows command line interface, cmd.

One way to assure people vote at most once per posting is to use this form of update: Execute following command to check if indexes are created.

MongoDB preserves the order of writes in a collection in its consistency model.

October 31, March 10, Sonali. MongoDB has a data type for binary data. Download and extract the json file in products.

Does the explain output indicate that an index was used? How many products match this query?

m102 homework 2.1

For question three, check value for indexName key which gives name of index m1022. This will run in an infinite loop printing some output as it runs various statements against the server.