FSPM Architecture

Oracle FS Path Manager (FSPM) manages the Linux multipath framework and communicates with Oracle FS System systems on a control path, which is separate from the data path. The Linux multipath framework manages the LUN data access paths.

The following figure illustrates how the FSPM software installed on a SAN host interacts with a Oracle FS System 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
	Other hardware and software
	SAN host kernel space
	SAN host user space

Figure 1 FSPM interaction with an Oracle FS System   

Legend

1  User	10  Linux multipath framework
2  User application	11 iSCSI software initiator (iSCSI)
3  SAN host	12 TCP/IP driver (iSCSI)
4 A Linux Multipath daemon with FSPM plug-ins and 4B FSPM daemon	13 HBA driver (FC, FCoE, or CNA) or NIC driver (iSCSI)
5  Control path (all dashed lines)	14  HBA (FC) or NIC (iSCSI)
6  Oracle FS System administrator	15  SCSI over FC (FC) or iSCSI over IP (iSCSI)
7  Oracle FS System CLI or 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