Quantum 6-01376-05 User Manual

  StorNext File System Tuning

Distributed LAN Servers

StorNext File System Tuning Guide

22

Distributed LAN Servers

Distributed LAN Servers must have sufficient memory. When a 

Distributed LAN Server does not have sufficient memory, its 

performance in servicing Distributed LAN I/O requests might suffer. In 

some cases (particularly on Windows,) it might hang.
Refer to the StorNext Release Notes for this release’s memory 

requirements.
Distributed LAN Servers must also have sufficient bus bandwidth. As 

discussed above, a Distributed LAN Server must have sufficient bus 

bandwidth to operate the NICs used for Distributed LAN I/O at full 

speed, while at the same time operating their Fibre Channel HBAs. Thus, 

Quantum strong recommends using PCI Express for Distributed LAN 

Servers.
Note that a single slow Distributed LAN server can reduce overall 

throughput for all clients. The slow server will get some of the traffic 

from all clients and tend to reduce throughput across the board. An 

example would be a server with less disk bandwidth than the other 

servers, or a server with a slow network connection.

Windows Memory Requirements

Beginning in version 2.6.1, StorNext includes a number of performance 

enhancements that enable it to better react to changing customer load. 

However, these enhancements come with a price: memory requirement. 
When running in the Windows environment on a machine with 

minimum memory (256 MB) the tuning parameters need to be adjusted 

or the machine will run out of memory. This can be seen by bringing up 

task manager and watching the 

 tag in the 

 

 pane 

in the lower right hand corner. On a machine with 256 MB of memory 

this value must be less than 96 MB.
The problem will manifest itself by commands failing, messages being 

sent to the   system log about insufficient memory, the