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Merged
merged 9 commits into from
Feb 2, 2023
Merged

Contribution to MongoDB topic #343

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70ee424
Responding to questions in Puppet section
Bilalbsd Jan 29, 2023
33277c9
Merge branch 'bregman-arie:master' into master
Bilalbsd Jan 31, 2023
330b971
responding to some MongoDB questions.
Bilalbsd Jan 31, 2023
de10b6d
responding to some MongoDB questions
Bilalbsd Jan 31, 2023
9105244
fixing the empty space
Bilalbsd Feb 1, 2023
c58b478
fixing a typing error
Bilalbsd Feb 2, 2023
2ae26ee
Update README.md
Bilalbsd Feb 2, 2023
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Update README.md
Bilalbsd Feb 2, 2023
80611ee
Update README.md
Bilalbsd Feb 2, 2023
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14 changes: 13 additions & 1 deletion README.md
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Expand Up @@ -1259,18 +1259,27 @@ as key-value pair, document-oriented, etc.

<details>
<summary>What is a document? What is a collection?</summary><br><b>

* A document is a record in MongoDB, which is stored in BSON (Binary JSON) format and is the basic unit of data in MongoDB.
* A collection is a group of related documents stored in a single database in MongoDB.
</b></details>

<details>
<summary>What is an aggregator?</summary><br><b>

* An aggregator is a framework in MongoDB that performs operations on a set of data to return a single computed result.
</b></details>

<details>
<summary>What is better? Embedded documents or referenced?</summary><br><b>

* There is no definitive answer to which is better, it depends on the specific use case and requirements. Some explainations : Embedded documents provide atomic updates, while referenced documents allow for better normalization.
</b></details>

<details>
<summary>Have you performed data retrieval optimizations in Mongo? If not, can you think about ways to optimize a slow data retrieval?</summary><br><b>

* Some ways to optimize data retrieval in MongoDB are: indexing, proper schema design, query optimization and database load balancing.
</b></details>

##### Queries
Expand All @@ -1285,6 +1294,9 @@ as key-value pair, document-oriented, etc.

<details>
<summary>What is the difference between find() and find_one()?</code></summary><br><b>

* `find()` returns all documents that match the query conditions.
* find_one() returns only one document that matches the query conditions (or null if no match is found).
</b></details>

<details>
Expand Down Expand Up @@ -2029,7 +2041,7 @@ This is where data is stored and also where different processing takes place (e.
<details>
<summary>What is a master node?</summary><br><b>

Par of a master node responsibilites:
Part of a master node responsibilites:
* Track the status of all the nodes in the cluster
* Verify replicas are working and the data is available from every data node.
* No hot nodes (no data node that works much harder than other nodes)
Expand Down