Docs: Document different hashing algorithms in receivers

[matej-g]

Is your proposal related to a problem?

We recently introduced new hashing algorithm, and although it feels "semi-experimental" to me at this stage, I think it would be good to document both the existing default algorithm and the new algorithm.

Describe the solution you'd like

As a user, when considering Thanos receiver, I want to be able to tell from the docs:

• How Hashmod algorithm and Ketama algorithm work, what are their pros and cons, what are their performance implications, how do they compare when horizontally scaling etc.
• How and whether I can migrate from one algorithm to another easily, what is the exact procedure, what are the pitfalls

Additional context

The original proposal for Thanos receiver details some working of the Hashmod algorithm: https://thanos.io/tip/proposals-done/201812-thanos-remote-receive.md/ For Ketama, the recent PR is useful for understanding: https://github.com/thanos-io/thanos/pull/5408

[rahul3002]

i would like too work on this issue

[matej-g]

Go for it @rahul3002 :muscle:

[rahul3002]

I have created introduction for hashing algorithm, but I'm bit confused on which file should i add that information, can u give the link of that particular file or location of that file

[matej-g]

I believe new section in https://thanos.io/tip/components/receive.md/ would be the most appropriate. What do you think?

[rahul3002]

will do it once then will decide

[rahul3002]

should i upload it here

[matej-g]

@rahul3002 What do you mean? Could you open a PR and we can review it? :slightly_smiling_face:

[rahul3002]

if u can share me the exact location of the file where I can update algorithm will be really helpful

[sayantandasgupta]

Hi, I would like to work on this issue. Can anyone guide me to a starting point?

[hackeramitkumar]

@matej-g I would like to work on it. Can you please assign it to me?