Discovery of CIs and relationships for direct attached and multipath block storage on Linux hosts



Discovery collects information on Direct Attached Storage (DAS), Storage Area Networks (SAN), and Network Attached Storage (NAS) from specialized devices, such as Storage Arrays, Fibre Channel Switches, iSCSI disks, and from host operating systems, such as Linux.

Discovery finds and maps dependencies for the following types of storage: 
  • Direct-attached storage (DAS), network-attached storage (NAS), or storage area network (SAN).
  • NAS or SAN storage that is discovered via a Storage Management Initiative Specification (SMI-S) and Common Information Model (CIM).
  • Virtual storage for VMware EXS servers and Linux Kernel-based Virtual Machines (KVM). Discovery maps this storage to the underlying physical storage.
Discovery of storage via a host reconciles data and creates relationships between the host's file systems and associated local storage devices. The local storage devices represent the storage available to the host, whether it's directly attached or provided by Fibre Channel or iSCSI. This reconciliation assumes that the storage server has been discovered first.
Discovery collects and creates CIs in the CMDB for the following information:
  • File systems (local and NAS).
  • Disks (both SAN disks and DAS drives). Fibre Channel (FC) HBAs and ports.
  • Linux Volume Manager (LVM) volumes. LVM volume data resides in the Storage Pool [cmdb_ci_storage_pool] table.
  • Veritas Volume Manager disks, subdisks, disk groups, plexes, and volumes.

For a detailed discussion of how Discovery maps dependencies and relates storage CIs to one another, see the attached document for direct attached and multipath, block storage.




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Last Updated:2019-08-02 21:23:01