FSPM Architecture

The Oracle FS Path Manager (FSPM) software uses HP-UX native multipathing to communicate with Oracle FS System servers along different pathways.

For information about HP-UX 11i v3 native multipathing, refer to the white paper Native Multi-Pathing for Mass Storage (http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01906512/c01906512.pdf).

FSPM communicates with Oracle FS System servers along two separate paths: the control path and the data path. The FSPM daemon uses the control path to manage path communication, and FSPM works with the HP-UX native multipathing framework to manage the LUN data access paths.

The following figure illustrates how FSPM software installed on a SAN host interacts with an Oracle FS System. The following table describes meanings of the lines and colors used in the figure.

Table 1 Line and color key for FSPM interaction diagram
Graphic element	Description
	Data path
	Control path
	Oracle FS System hardware and software
	Non-Oracle FS System hardware and software
	SAN host kernel space
	SAN host user space

Figure 1 FSPM interaction with an Oracle FS System FSPM interaction with Oracle FS System

Legend

1 User	10 HP-UX multipathing features
2 User application	11 iSCSI software initiator (iSCSI)
3 User space	12 TCP/IP driver (iSCSI)
4 FSPM service, fspmd	13 HBA driver (FC) or NIC driver (iSCSI)
5 Control path (all dashed lines)	14 HBA (FC) or NIC (iSCSI)
6 Oracle FS System administrator	15 SCSI over Fibre Channel (FC) or iSCSI over IP (iSCSI)
7 Oracle FS System command line interface (CLI) or Oracle FS System Manager (GUI)	16 Data path (all solid lines)
8 Encrypted messages over TCP/IP	17 Oracle FS System
9 Network card	18 Drive Enclosure storage pool