HCP System Management Help
Object ACLs cannot be changed through the HSwift API but collisions can still occur. An ACL collision occurs when these events occur in the order shown:
1.Different changes are made to the ACL for a given object on each of two systems in a replication topology (on interfaces that support object ACLs).
2.The changed ACL on one of the systems is replicated to the other system.
An ACL is treated as a single unit. If a collision occurs when a changed ACL for a given object is replicated from one system (system A) in a replication topology to another system (system B) in the topology:
•If the last change to the ACL on system A is more recent than the last change to the ACL on system B, HCP changes the ACL on system B to match the changed ACL on system A.
•If the last change to the ACL on system B is more recent than the last change to the ACL on system A, HCP does not change the ACL on system B.
For example, suppose the ACL for a given object starts out with these grants on both system A and system B:
All users: read
User lgreen: write
User mwhite: write, delete
The table below shows a sequence of events in which the ACL for the object is changed and the change is then replicated.
Name | Description |
---|---|
1 |
On system B, a client changes the permissions in the ACL to: All users: read |
2 |
On system A, a client changes the permissions in the ACL to: All users: read |
3 |
The changed ACL on system A is replicated to system B. The resulting ACL for the object on system B contains these permissions: All users: read |
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