User guide

DataDirect Networks SFA™ OS 2.0.0 Release Notes Revision A1 | 8
using CLUI. The 'app show stack' command now includes this information within
the IOC’s output details.
o Customer Controller Replacement Support
In the event of a controller failure, the process of replacing the failed controller
can be now performed by a customer. Details on how to replace a failed
controller can be found in the SFA OS User Guide.
o Virtual Machine Root on VD Support With SFA12K-20E
A Virtual Machine can be configured to have its root on a virtual disk instead of a
local disk when used in conjunction with DirectMon. To use this feature,
separately configure virtual disks in your SFA storage pools and configure
DirectMon to boot the VM over the network every time it starts up. If you use this
feature, it means you do not need to associate a VM disk image with the VM.
o Increased Memory Available for VMs
System memory usage was improved to allow additional memory for virtual
machines (VMs) on E-platforms. On SFA12K-20E, the amount of memory for a
four VM configuration is now 31 GB per VM.
New installations are pre-configured by the factory to use this additional memory
in each VM. Existing configurations upgrading to this release will need to
reconfigure their VM to take advantage of this additional memory. To reconfigure
and existing VM, use CLUI commands as shown in the following example for a
SFA12K-20E:
app set stack 0 memory_pending 31
app set stack 1 memory_pending 31
app set stack 2 memory_pending 31
app set stack 3 memory_pending 31
app set stack 32768 memory_pending 31
app set stack 32769 memory_pending 31
app set stack 32770 memory_pending 31
app set stack 32771 memory_pending 31
The new settings won't take effect until next time the VMs/stacks are started.
Refer to the GRIDScaler or EXAScaler Admin Guide for further information on
shutdown and restarting the VM/stack.
o Increased User Mode Networking Performance, VM Driver Change
Performance of user mode networking has been greatly improved. User mode
networking provides access to the VMs using the controller IP address and port
numbers starting at 5555 (for the first VM). The guest OS is now configured to
use the e1000 driver instead of the 8139 based driver. Performance is significantly
better, especially for using scp to copy large files in to the VM using these special
ports. The VM does not need to be re-configured for this change if it has already
been installed. See known issues for potential problems with new installations
when combined with enhanced network management support (sr-iov).
o SFA Controller Subsystem Shutdown Will No Longer Succeed While VMs are
Running