Use case for multiple "zonegroup"s in a realm

[Richard Chan <richard@xxxxxxxxxxxxxxxxxxxx>]

What are good use cases for multiple zonegroups: is this mainly a namespacing thing? What do you use it for?

Please help my understanding:

Within a realm, all zonegroups share the same namespace(object IDs?) for tenants, users, and buckets(is this correct)? All these entities are created in the master zone of the master zonegroup.

However separate zonegroups are used if you want to avoid blob sync'ing, i.e, there is intra-zonegroup sync'ing but no inter-zonegroup sync.

RHCS2 documentation uses only one zonegroup: https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/2/html/object_gateway_guide_for_red_hat_enterprise_linux/multi_site

SES3 documentation uses only one zonegroup: https://www.suse.com/documentation/ses-3/book_storage_admin/data/ceph_rgw_fed.html

Regards

--

Richard Chan

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