ltagliamonte-dd commented on PR #2827:
URL: https://github.com/apache/kvrocks/pull/2827#issuecomment-2725069805
> @ltagliamonte-dd Could you please explain how the data returned by this
command will be used for "SSTable sideloading"? Just to understand the flow.
Sure thing @torwig, here more details:
For my understanding data types that use versioning (like sets,zset,hash)
share the key version with their sub keys.
For example for hash data types (HSET Key subKey1 subKey1val1) there is a
rocksdb row for the `Key` and an row for `subKey1`.
The `Key` and the `subKey1` share the metadata.version.
When writing to kvrocks there are 2 use cases:
- add a new key
a new version is created for the `Key` and that version is inherited by
`subKey1`
- update an existing key
the version needs to be retrieved from the `Key` and shared with the
`subKey1`
This new CMD covers the update of an existing key.
I'm still quite new to the decode/encode part of the project please let me
know if my understanding is not correct.
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