NEC Express5800/R310g-E4 User Manual page 24

Chapter 1 General Description
(a) Advantages of this server

Highly fault-tolerant processing and I/O subsystems
This server uses redundant hardware and software to assure server operation even if one module suffers
trouble with its processor, memory, I/O (including trouble related to the I/O controller), hard disk drive, or
network adapter.

Continuous network connection
This server maintains continuous network connection by detecting any trouble with the network adapter,
connection, etc. If trouble occurs, the standby network connection will take over all network traffic processing
and thus securely maintain the network system connection of the server without losing network traffic or client
connection.

Support of multiple network connections
Since this server can support multiple network connections, you can add network redundant control or
network traffic control.

No need to modify applications
You can run the each OS-compliant application on this server. Thus, unlike other highly fault-tolerant products,
special API or scripts are not necessary.

Automatic mirroring
This server automatically maintains data as the current data.

Transparent migration
This server constantly monitors events. If trouble occurs on server module of this server, it will transparently
use a redundant module of the failed module. This feature maintains data and user access without stopping
application service.

Automatic reconfiguration
When the failed module restarts after the trouble is corrected, the server will perform reconfiguration
automatically, and if necessary, resynchronize the affected modules. Reconfiguration can include CPU
processing (e.g., CPU memory), server's operating system (and related applications), and system data stored
on the hard disk drive. In most cases, the server automatically restores redundancy of the server modules
after recovery.

Event notification function (Windows)
When trouble or other events are detected on the server, they will be notified to Log and saved. Therefore,
you can view the log items locally or remotely by a usual OS operation. Since an events use unique IDs, they
are easy to distinguish. In addition, you can use alert notification software such as Express Report Service
or Express Report Service (HTTPS) to manage the server. It is recommended to use such software to cope
with system failure quickly. Ask your service representative for details.

syslog function (VMware)
All events and failures detected by the server are saved in syslog. In addition, you can use alarm report
software, such as Express Report Service, for management of this server. It is recommended that Express
Report Service be used also to cope with system failures quickly. Ask your sales representative for details.

In-service repairing
You can repair or replace a failed module even if the server is operating.
24
Express5800/R310g-E4, R320g-E4, R320g-M4 User's Guide
3. Features