HP 3PAR Remote Copy Software - Manual (Page 34)

2.18 Remote Copy Connections
Remote Copy User’s Guide InForm OS Version 2.3.1
Figure 2-10. Sending Links for a Remote Copy Pair
2.7.2 Receiving Links
While sending links are used to transmit data, receiving links are used to listen. The receiving
links read Remote Copy data and commands and send them to the appropriate Remote Copy
process for processing. Unlike sending links, there is only a single link of a given type per node,
regardless of the number of sending links of that type.
2.8 Remote Copy Connections
When using Remote Copy for disaster recovery, the backup storage server should reside at a
remote site some distance from the primary server(s) so that the two sites are unlikely to be
affected by the same disaster. The latency of Remote Copy writes increases with distance.
Storage servers in a Remote Copy pair are connected through a dedicated link or through a
network (see Figure 2-16 on page 2.41 ). You should choose a specific topology based on
several factors, including the distance between the servers and the required bandwidth of the
connection.
Node 6 Node 7
Network
InServ1
Node 2 Node 3
InServ2
172.16.1.12 172.16.2.12
172.16.1.11 172.16.2.11
172.16.1.11 172.16.2.11
172.16.2.12 172.16.1.12
Links to
Target:
Links to
Target:
InServ2
InServ1