what operations does the PSA perform?

When coordinating the VM NMP and any installed 3-party MIP, what operations does the PSA perform?

A.
Implements logical devices bandwidth sharing

B.
Process I/O request to logical devices

C.
Associate physical path with logical devices

D.
Manage physical path claiming and unclaiming

Explanation:
it is A, as B, C and D are performed by NMP. For reference please refer to page 23-24 of this document http://www.vmware.com/pdf/vsphere4/r40/vsp_40_san_cfg.pdf

3 Comments on “what operations does the PSA perform?

  1. Anitha says:

    Yes correct . http://pubs.vmware.com/vsphere-50/index.jsp?topic=/com.vmware.vsphere.upgrade.doc_50/GUID-DD8C6FF2-1949-4C82-A4BA-578988CA7BA1.html

    The multipathing modules perform the following operations:

    ■ Manage physical path claiming and unclaiming.

    ■ Manage creation, registration, and deregistration of logical devices.

    ■ Associate physical paths with logical devices.

    ■ Support path failure detection and remediation.

    ■ Process I/O requests to logical devices:

    ■ Select an optimal physical path for the request.

    ■ Depending on a storage device, perform specific actions necessary to handle path failures and I/O command retries.

    ■ Support management tasks, such as reset of logical devices.


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