NEC Express5800/R320d-M4 User Manual page 43

Chapter 1 General Description
Advantages of Express5800/ft series
• Highly fault-tolerant processing and I/O subsystems
Express5800/ft series use 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), disk drive, or
network adapter.
• Continuous network connection
Express5800/ft series 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 Express5800/ft series without
losing network traffic or client connection.
• Support of multiple network connections
Since Express5800/ft series can support multiple network connections, you can add network redundant
control or network traffic control.
• No need to modify applications
You can run Windows/VMware-compliant applications on Express5800/ft series. Thus, unlike other highly
fault-tolerant products, special API or scripts are not necessary.
Automatic mirroring
•
Express5800/ft series automatically maintains data as the current data.
• Transparent migration
Express5800/ft series constantly monitors events. If trouble occurs on Express5800/ft series server module,
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, Express5800/ft series 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 drives. In most cases, Express5800/ft series automatically restores redundancy of
the server modules after recovery.
• Event notification function for Windows
When trouble or other events are detected on Express5800/ft series, they will be notified to Windows Event
Log and saved. Therefore, you can view the log items locally or remotely by a usual Windows procedure.
Since an Express5800/ft series 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.
• Event notification function for VMware
When trouble or other events are detected on Express5800/ft series, they will be notified to syslog and
saved. In addition, you can use alert notification software such as Express Report Service to manage the
server. It is recommended to use such software to cope with system failure quickly. Ask your service
representative for details.
• In-service repairing
You can repair or replace a failed module even if Express5800/ft series is operating.
Express5800/R320c-E4, R320c-M4, R320d-E4, R320d-M4 User's Guide
3. Standard Features
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