Why are Rados Gateway clients observing a brief IO disruption while doing minor Red Hat Ceph Storage upgrades?

Solution Verified - Updated -

Issue

  • While performing a minor RHCS (Ceph) upgrade using the upgrade procedure available in the Ceph Upgrade Guide, it's possible that Rados Gateway clients might observe a brief IO disruption.
  • Examples: Upgrading from 5.3z3 to 5.3z8 or 7.1z1 to 7.1z5.
  • Why is this so? Is there any solution or workaround?

Environment

  • Red Hat Ceph Storage version 5
  • Red Hat Ceph Storage version 6
  • Red Hat Ceph Storage version 7
  • Red Hat Ceph Storage version 8
  • Ceph Rados Gateway (RGW)

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