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Innerworks

  1. Upload (Request): Capped at 2 MB. This includes the total serialized JSON size of all 100 items in your batch.
  2. Download (Response): Capped at 4 MB. This allows the server to send back a more detailed response (including metadata and eTags for every item) than what you originally sent.

Ports

CosmosDB uses dynamic port assigned, checkout SNAT https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/troubleshoot-dotnet-sdk

API Features

https://learn.microsoft.com/en-us/azure/cosmos-db/resource-model

Do not be mistaken this is API, not that the feature is not there.

  1. etag only exists in NoSQL (use for consistency)
  2. Anything not (id) are only defined for NoSQL.
  3. Cassandra do not do indexing
  4. Change Feed is available for NoSQL, MongoDB, Cassandra, and Gremlin APIs (Table doesn't have it natively without some workarounds).
  5. TTL vs Analytical TTL (only NoSQL and MongoDB has this)

The ttl property is the user-defined time-to-live for a document in seconds. The _ts property is the system-generated timestamp representing the epoch time of the last update. The system evaluates document expiration by comparing _ts + ttl against the current time.

Reserve keys/field name

Reserve keys in NoSQL

id Field (User-Defined Unique Key): - This is the only property required when you insert a new document. - The value of id must be unique within the set of documents that share the same partition key value. - If you don't specify a partition key, id must be globally unique within the entire container. - In SDK/Data Explorer this is auto-generated, but not if you use REST directly. - Cosmos DB automatically indexes the id property.

_rid Field (Resource ID): - This is a system-generated unique identifier for the resource (document, stored procedure, etc.). - It is unique across the entire database account. - It is read-only and immutable. You cannot set or change it. - It's used internally by Cosmos DB.

_self Field (Self-Link): - This is a system-generated URI used to address the resource. - It's read-only and immutable.

_etag Field (Concurrency/Optimistic Locking): - This is a system-generated value used for optimistic concurrency control (checking if a document has been modified by someone else since you read it).