Support ceph-dencoder

[mfatemipour]

Hi, Is there any plan to support decode/encode ceph structs ? like something that we have in ceph-dencoder tool

[phlogistonjohn]

Could you please post links to the features/tools in question? I'm not familiar with ceph-dencoder and just saying "encode/decode" could mean a lot of different things.

[tchaikov]

@phlogistonjohn hi John, @mfatemipour might be referencing https://github.com/ceph/ceph/tree/master/src/tools/ceph-dencoder

[phlogistonjohn]

OK, I've also now looked at https://docs.ceph.com/en/latest/man/8/ceph-dencoder/ and have a rough idea of what the tool does. Unfortunately, I don't quite see how this fits in the grand scheme of things. Basically: if you would like someone else to implement this for you, we need to understand the use case - the why and the how - this would be used as part of go-ceph.

If you're more interested in contributing something, feel free to strike up a conversation or submit a prototype. :-)

[mfatemipour]

Actually I want to iterate on some rados objects and get some information about their manifets attribute (related to rgw), but rados get attributes as an encoded byte array, and there is not any programatically way to decode it unless using ceph-dencoder tool (as a exec cmd) that makes every procedure very very slow.

[phlogistonjohn]

Thanks @mfatemipour if I understand it correctly, you want to read data from rados that's not available in an API call and interpret the meaning.

So, we can look into it, but please do understand that if this isn't a fully-fledged C api that ceph provides it may be challenging to implement. I'm tagging this as a feature request now that I think I understand the request.

[iliul]

/cc