Pillar Axiom: How to collect AxiomOne Path Manager (APM) logs on a host
Last updated on APRIL 17, 2014
Applies to:Pillar Axiom 300 Storage System - Version Not Applicable to Not Applicable [Release N/A]
Pillar Axiom 500 Storage System - Version Not Applicable to Not Applicable [Release N/A]
Pillar Axiom 600 Storage System - Version Not Applicable to Not Applicable [Release N/A]
Information in this document applies to any platform.
1.1 What's it all about?
AxiomOne Path Manager (APM) is a software package which runs on SAN Host systems to manage multipathing of SAN connections between the host and the Pillar Axiom system. It also provides integration into the management system on the Axiom. There are several different implementations of APM for different host Operating Systems.
1.2 This Document
This document explains what APM is, and describes how and when diagnostic logs should be collected for APM.
2. APM Overview
Each implementation of APM consists of either one or two major components:
- A user-mode component generally referred to as the Daemon. Its job is to manage and monitor the SAN multipathing on the host, and to integrate with the AxiomONE Storage Services Manager on all Pillar Axiom systems to which the host is attached. All implementations of APM include this component. It runs as a Service on Windows and as a background task on UNIX-alikes.
- A kernel-mode component generally referred to as the Driver. Its job is to implement the multipathing of the SAN connections, grouping paths to a LUN together, monitoring for failure and automating failover, and so on. Some implementations of APM provide this component in its entirety; some provide a module which gives Axiom-specific hints and recommendations to an OS-supplied multipathing module; some do not provide this component at all, relying entirely on multipathing functionality provided by the Operating System.
There are also a number of minor supporting acts which vary between implementations.
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