Category Archives: Tutorial

These articles give tip as to how to use Avalanche.

Setting up Avalanche Automation on Linux


The Avalanche product comes with a fully-featured TCL API for several operating systems: Windows, Linux and FreeBSD. Coupled with the “GUI to TCL” feature of the Windows thick client (Avalanche Commander) it’s a very powerful automation tool. The typical use … Continue reading

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Testing Server Name Indication (SNI) In The Lab


People have been saying that Internet will run out of IPv4 address space for a long time now, and somehow hosting companies always managed to cope. One of the “coping mechanisms” consists of regrouping several websites behind one IP address … Continue reading

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Avalanche Now Supports ETag and If-None-Match


With the release of version 4.37 this week, Avalanche now supports the ETag and If-None-Match concept. This will be highly useful for Content Delivery Network (CDN) testing as well as caching devices implementing this concept. Let’s start with a little … Continue reading

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Using the Action List To Create More Dynamic Tests


One of the key feature of Avalanche is the “Simulated User” concept, coupled with Action Lists. The Action Lists represent exactly that: a list of actions that each users assigned to it will execute. You can mix protocols, so it’s … Continue reading

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Installing Avalanche Anywhere on CentOS 64 bits


A couple of month ago, Spirent released Avalanche Anywhere (as well as STC Anywhere). The goal of these products is to give our customers the ability to put the Avalanche (or STC) backend on any Linux distribution. For support purposes … Continue reading

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Adaptive Bitrate in Avalanche – Configuration & Stats


Starting with version 4.10, Spirent Avalanche officially supports Apple HLS (AHLS) as a server for Adaptive Bitrate (we supported the technology in a client-only fashion before then). That means you can emulate Apple HLS servers with Avalanche, generating random content. You … Continue reading

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Realistic Latency Measurement in the Application Layers


We are often asked how to measure the one-way latency with Avalanche, or “why don’t I see a one-way latency metric in my results.” This entry will explain why we don’t measure the one-way latency, and how you can measure … Continue reading

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