(oops, forgot to reply-all)

On Wed, Oct 27, 2021 at 12:58 PM Trey Palmer <nerdmagic...@gmail.com> wrote:
>
> Hi,
>
> We have a couple of buckets used for media transcoding scratch space that
> have huge lists under "ver" and "master_ver" when doing a "radosgw-admin
> bucket stats".
>
> Can anyone tell me what these version lists are for?  I saw that Casey said
> they're not related to bucket versioning, but I'm just wondering what they
> *are* used for, and if they're causing any inefficiencies and if so if
> there's any way to get rid of tracking them?

it looks like these are coming from
librados::IoCtx::get_last_version(), which is a per-object version
number tracked by rados. cls_rgw seems to be storing the latest
version number for each bucket index shard object, but i can't tell
what exactly it's using them for - i just assume it's somehow related
to ordering of operations

> These happen to be on Luminous (I know) but I checked some Nautilus
> clusters and they have similar version entries, though not as big I'm
> assuming because the buckets are less transient.
>
> Thanks,
>
> Trey Palmer
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