The best way we learn anything is by practice and exercise questions. We have started this section for those (beginner to intermediate) who are familiar withNoSQLandMongoDB. Hope, these exercises help you to improve your MongoDB query skills. Currently, following exercises are available based on...
or Google Cloud. We’re increasingly seeing customers run independent workloads on different clouds — a common practice among enterprises with different applications and business units. However, we believe the real power of multi-cloud applications is yet to be realized in our industry. So today,...
the shape of that data matters if you plan to do more than simply retrieve whole documents by keys. The Need to Model for NoSQL At this year's MongoDB World event, Daniel Coupal , staff developer advocate at MongoDB, explained that the need to model data in a document database is due...
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DataFrame(dataset) df['date'] = pd.to_datetime(df['date']) df = df[['date', 'cuisine', 'average']] df.set_index('date', inplace=True) base_dir = pathlib.Path(__file__).parent.parent output_dir = base_dir / 'plots' / 'cuisines' output_dir.mkdir(exist_ok=True, parents=...
you may need a secondary member to be the base for analytics work, which would benefit from an up-to-date dataset but would cause a strain on working members. By setting this member to hidden, it will not interfere with the general operations of the replica set. Hidden members must be...
(through MongoDB methods and aggregation) are best learned through playing around with data. In this chapter, we have provided a simple yet interesting real-life dataset that will be your starting point. Finally, this chapter should enable you to import your own data and apply the principles ...
Predictably, this makes that node contains a different dataset from the rest of the set. If an update happens to hit that single document, the whole set could crash. To make matters worse, it is entirely possible that this situation could stay dormant for a long time, only to strike sudde...
As the shard key on the UUID field scales your write operations a lot better, it may not be the desired shard key for analyzing your full dataset within a specific time range. As the shard router is unaware of the secondary index on the timestamp, each and every shard will then be con...
Docker support: starts a MongoDB automatically in Docker for you. Only insert the smallest dataset for a quick data import with --small (cool for live demos). Requirements: Docker if you use the docker option. MongoDB (mongoimport, mongorestore) unzip unrar (for the Enron dataset) Contr...