iSCSI LUN and target Maximums in ceph-iscsi-3.0+

[Wesley Dillingham <wdillingham@xxxxxxxxxxx>]

I am trying to determine some sizing limitations for a potential iSCSI deployment and wondering whats still the current lay of the land:

Are the following still accurate as of the ceph-iscsi-3.0 implementation assuming CentOS 7.6+ and the latest python-rtslib etc from shaman:

• Limit of 4 gateways per cluster (source: https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/3/html/block_device_guide/using_an_iscsi_gateway#requirements)



• Limit of 256 LUNS per target (source: https://github.com/ceph/ceph-iscsi-cli/issues/84#issuecomment-373359179 ) there is mention of this being updated in this comment: https://github.com/ceph/ceph-iscsi-cli/issues/84#issuecomment-373449362 per an update to rtslib but I still see the limit as 256 here: https://github.com/ceph/ceph-iscsi/blob/master/ceph_iscsi_config/lun.py#L984 wondering if this is just an outdated limit or there is still valid reason to limit the number of LUNs per target
  



• Limit of 1 target per cluster: https://github.com/ceph/ceph-iscsi-cli/issues/104#issuecomment-396224922
  

Thanks in advance.

Respectfully,

Wes Dillingham

wdillingham@xxxxxxxxxxx

Site Reliability Engineer IV - Platform Storage / Ceph

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