I am not a database expert and have no formal computer science background, so bear with me. I want to know the kinds of real world negative things that can happen if you use an... moreI am not a database expert and have no formal computer science background, so bear with me. I want to know the kinds of real world negative things that can happen if you use an old MongoDB version prior to v4, which were not ACID compliant. This applies to any ACID noncompliant database.
I understand that MongoDB can perform Atomic Operations, but that they don't "support traditional locking and complex transactions", mostly for performance reasons. I also understand the importance of database transactions, and the example of when your database is for a bank, and you're updating several records that all need to be in sync, you want the transaction to revert back to the initial state if there's a power outage so credit equals purchase, etc.
But when I get into conversations about MongoDB, those of us that don't know the technical details of how databases are actually implemented start throwing around statements like:
MongoDB is way faster than MySQL and Postgres, but there's a tiny chance, like... less
I am concerning about extracting data from MongoDB where my application transact most of the data from MongoDB.
I have worked on sqoop to extract data and found RDBMS gel up with... moreI am concerning about extracting data from MongoDB where my application transact most of the data from MongoDB.
I have worked on sqoop to extract data and found RDBMS gel up with HDFS via sqoop. However, no clear direction found to extract data from NoSQL DB with sqoop to dump it over HDFS for big chunk of data processing? Please share your suggestions and investigations.
I have extracted static information and data transactions from MySQL. Simply, used sqoop to store data in HDFS and processed the data. Now, I have some live transactions of 1million unique emailIDs per day which data modelled into MongoDB. I need to move data from mongoDB to HDFS for processing/ETL. How can I achieve this goal using Sqoop. I know I can schedule my task but what should be the best approach to take out data from mongoDB via sqoop.
Consider 5DN cluster with 2TB size. Data size varies from 1GB ~ 2GB in peak hours. less
I have come across many NoSQL databases and SQL databases. There are varying parameters to measure the strength and weaknesses of these databases and scalability is one of them.... moreI have come across many NoSQL databases and SQL databases. There are varying parameters to measure the strength and weaknesses of these databases and scalability is one of them. What is the difference between horizontally and vertically scaling these databases?