Skip metadata upload if no new segment files to upload during refresh for remote store clusters

[ashking94]

Is your feature request related to a problem? Please describe

In the refresh flow of remote store indexes, we determine the files to be uploaded, upload them and then upload the associated metadata. This, however, uploads the metadata even when there is no new files to upload. This can be optimised and metadata upload can be skipped for such cases.

https://github.com/opensearch-project/OpenSearch/blob/3966ed93beb2ff13854d2a6e1ff51dfa32295830/server/src/main/java/org/opensearch/index/shard/RemoteStoreRefreshListener.java#L266C21-L292

Describe the solution you'd like

Optimise the segments upload flow to skip metadata upload when there are no newer segment files.

Related component

No response

Describe alternatives you've considered

No response

Additional context

No response

[kaushik95]

Could you please assign this issue to me? I would like to work on this issue.

[ashking94]

Thanks @kaushik95, you can work on this.

[HyunSangHan]

Hi, I saw that this contribution hasn’t had any updates in a while. Would you be open to me giving it a try?

[kaushik95]

Hi, I'll be working on this issue and should have updates within the next two weeks.

[ashking94]

Hi @HyunSangHan, why don't you look at other issues and see if something else interests you? Happy to help you find one if needed.