How to improve the write speed of mongo?

@rollin 

There are several ways to improve the write speed of MongoDB:

1. Use bulk operations: Instead of inserting or updating documents one by one, consider using bulk operations such as insertMany, updateMany, or bulkWrite. This can significantly reduce the overhead of individual write operations and improve the overall write speed.
2. Use indexes: Properly indexing the fields that are frequently used for queries or updates can improve write performance by reducing the time it takes to locate the documents being updated. Be mindful of the impact of indexes on write performance, as maintaining indexes can also impact write speed.
3. Use sharding: Sharding involves distributing data across multiple shards, which can help distribute the write workload and improve overall write speed. However, sharding also requires careful planning and configuration to ensure optimal performance.
4. Optimize your schema: Carefully design your schema to minimize the number of indexes that need to be maintained and ensure that queries and updates are efficient. Avoid overly nested structures, large arrays, or fields that have a high degree of cardinality, as these can impact write performance.
5. Use write concern wisely: MongoDB offers different levels of write concern, which determine the level of acknowledgement required from the server for a write operation to be considered successful. Using a lower write concern level can improve write speed, but may also lead to data loss in case of server failures.
6. Tune server configuration: Adjusting various configuration parameters such as the storage engine, journaling, write concern, and other settings can also have an impact on write performance. Experiment with different settings to find the optimal configuration for your workload.
7. Upgrade hardware: Improving the performance of your hardware, such as using faster disks, more RAM, or better CPUs, can also help improve write speed. Consider upgrading your hardware if you are consistently hitting performance limits.
8. Monitor and optimize performance: Regularly monitor the performance of your MongoDB deployment using tools such as MongoDB Compass, mongostat, or the MongoDB profiler. Identify bottlenecks and optimize your queries, indexes, and configuration settings to improve write performance.