Precautions For Using Hyper-V; System Down Time Caused By Duplexing Cpu Module; Virtual Network Setting And Active Upgrade - NEC Express5800/R320a-E4 User Manual

3-2 Windows Setup and Operation

PRECAUTIONS FOR USING HYPER-V

This section describes precautions for using Hyper-V with NEC Express5800/ft series.
Refer to the URL below for precautions other than those described in this section.
http://support.express.nec.co.jp/os/w2008r2/hyper-v-v2.html

System Down Time Caused by Duplexing CPU Module

In the duplex process of CPU modules, a memory copy is performed to duplex memory on both the
CPU modules. Some part of memory area can be copied without stopping the system while the other
part requires the system to stop. When using Hyper-V, you cannot use the function to copy without
stopping the system.
Therefore, the system does not respond for a longer period of time during the duplex process of
CPU modules as compared to when Hyper-V is not used. The following are the reference values of
each model.
IMPORTANT:
Starting a memory copy does not cause OS shutdown. However, a process that was running
before copying is interrupted, and it does not respond for a certain period of time. The
interrupted process will be resumed after the memory copy is completed.
The time required for copying increases in proportion to the installed memory size.
When a large amount of memory is installed, non-responding time will become longer and
the connection from a client may time out. Adjust the timeout values of TCP/IP, etc., on the
client side as necessary.
Model/Memory Size
NEC Express5800/R320a-E4
NEC Express5800/R320b-M4
* Use the above memory copy time as a guide, as the actual time may differ depending on the
status of use.

Virtual Network Setting and Active Upgrade

A team assigned to the virtual network by Hyper-V Virtual Network Manager cannot be used in
Active Upgrade.
To use Active Upgrade, at least two teams are required.
4 GB 12 GB
9 sec 29 sec
4 sec 8 sec
24 GB 48 GB
57 sec 113 sec
15 sec 29 sec
96 GB
-
57 sec