Kofax Communication Server 9.2.0 User Manual

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Environment Guide

Version 9.02.00

5.4.3

Checking Network Latency

In order to verify whether there are any network bottlenecks the easiest way is to observe so called round-

trip-time (RTT) values between particular nodes communicating through the network (note that the primary-

secondary network latency is observed by the dedicated remote disk network delay counter).

The RTT counter is the time that elapses between sending a data request from one node to the other and

receiving a data response back in the sending node.

TCOSS provides following Windows performance counters to observe the network communication

between:

1. TCOSS and LS1 servers and/or TC/FoIP servers:

TCOSS Links\Avg. Packet-Ack Time ms

TCOSS Links\Peak Packet-Ack Time ms

The counters indicate basically network round-trip-time between the TCOSS and LS1 or TC/FoIP
servers. However, the value may include and additional delay of 0 … 300ms that may have occurred
during handling of the packet on the responding node.

2. TCOSS storage and media servers:

TCOSS Links\Avg. Round Trip Time ms

TCOSS Links\Peak Round Trip Time ms

The counters indicate the real network round-trip-time between the storage and connected media

servers (do not include any delay on the media server)

For the detailed description of these counters, please refer to the TCOSS System Manual.

Select TCOSS Links counters to add them in the Windows performance monitor (in the example below we

want to observer 2 LS1 servers connected as nodes L.10 and L.20: