
Open systems
host
CLI script
ESSCSCLICLIsoftware
Network interface
CS Server A | CS Server B |
CS Client | CS Client |
Cluster 1 | Cluster 2 |
ESS 800 |
Figure 10-1 Command flow for ESS 800 Copy Services commands
A CS server is now able to manage up to eight F20s and ESS 800s. This means that up to sixteen clusters can be clients of the CS server. All FlashCopy and remote copy commands are sent to the CS server which then sends them to the relevant client on the relevant ESS.
DS CLI command flow
Scripts that invoke DS CLI commands issue those commands to the installed DS CLI software on the open systems host. If the command is intended for an ESS 800 volume, then the DS CLI software sends it to the CS server on the ESS 800. If, however, the command is intended for a DS8000, the command is issued to the CLI interpreter of the Storage Hardware Management Console
Secure sockets
All DS CLI traffic is encrypted using SSL (secure sockets layer). This means that all traffic between the host server that is running the DS CLI client and the DS CLI server (for example, the
TCP/IP ports
DS CLI servers (such as an
Chapter 10. DS CLI 199