Advantech ASR-5300I Series, Руководство пользователя

Страница: 64 / 122

ASR-5300I Series Hardware User Manual 54
When connected to both the FC host and iSCSI host, the connections will operate
according to their respective speeds. This maximizes the number of connections
while retaining the optimum performance gained by the high-speed FC link and FC
switch
(FC) .
3.6.2 Utilizing Hybrid iSCSI Ports for Data Replication
The above diagram demonstrates how to use the iSCSI host ports for remote data
replication.
Two hybrid systems, a source system
(1), and a target system (2) reside within the
same virtual pool but are physically apart. Users should create a volume copy/mirror
pair for data protection, but should avoid relying on slow management LAN cable
connections. For such cases, hybrid systems can be linked using iSCSI host ports. If
the distance between the enclosures is far, additional iSCSI switches
(3) may be
required.
The above illustration demonstrates how to fully benefit from a high-speed FC host
link and management LAN connection, as well as a robust link for data protection
(volume copy/mirror).
The SANWatch software suite, on which the volume copy/mirror settings are config-
ured, automatically detects the iSCSI data connection and uses it for data replication.
Note! For optimum performance, ensure that the LAN switch (1) for the man-
agement station (2) , the LAN switch for the systems, and the iSCSI
switch (3) for the iSCSI host link are separated.
Otherwise, the host might consider the iSCSI connection as part of the
host connection and use it for data I/O, even if the iSCSI ports are not
mapped to the host. This slows the data transaction speed to that of the
iSCSI connection, wasting the fast FC connection bandwidth.