March 2019
Intermediate to advanced
394 pages
11h 4m
English
Content preview from Mastering MongoDB 4.x - Second Edition
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Commonly used commands and locks
The commonly used commands and locks are as follows:
|
Command |
Lock |
| find() | S |
| it() (query cursor) | S |
| insert() | X |
| remove() | X |
| update() | X |
| mapreduce() | Both S and X, depending on the case. Some MapReduce chunks can run in parallel. |
| index() |
|
| aggregate() | S |
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