Intel NetStructure Cache Appliance features | Intel 1520 manual

Server accelerator

The appliance can be conﬁgured as a web server to accelerate slower traditional web servers. Documents stored in cache are served at high speed, while documents not in cache are requested on demand from slower, traditional web servers. This server accelerator feature is also called reverse proxy.

Part of an HTTP cache hierarchy

The appliance can participate in ﬂexible cache hierarchies, where Internet requests not fulﬁlled in one cache can be routed to other regional caches, taking advantage of the of nearby caches.

ICP sibling

The appliance supports the standard Internet Cache Protocol (ICP) to interoperate with existing ICP cache hierarchies. The appliance can send ICP queries to neighboring caches as part of an ICP cache hierarchy.

NNTP news cache

The appliance caches and serves NNTP news articles and can accept news feeds for designated news groups.

Intel NetStructure Cache Appliance features

The appliance provides a rich set of features to ensure high performance and superior stability and to offer broad ﬂexibility. The following list provides a brief overview of the appliance’s primary features. For a more exhaustive list and description of features, refer to Carrier-class architecture‚ on page 143.

Scalability

The appliance scales from a single node into multiple-node clusters, allowing you to improve system performance and reliability simply by adding more nodes to your cluster. Support exists for two types of clusters: soft clustering and management-only clustering. For more information on clustering, see Clustering‚ on page 140.

Boot Image Redundancy

The appliance features both a primary and secondary boot image on separate hard drives. When a drive with a boot image fails, a system administrator can detect and replace the faulty hard drive. This feature helps maximize the time your system is up and running uninterrupted.

Chapter 1 Introduction

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Intel 1520 manual Intel NetStructure Cache Appliance features

Contents

Intel NetStructure 1520 Cache Appliance Copyright 2000, Intel Corporation. All rights reserved Contents Configuring the Appliance Using the Command-Line Interface Troubleshooting Problems 109 Error Messages 151 Changing network address configuration on the NIC Contents 106 Preface Bold Who should read this manualConventions used in this manual Convention Purpose Introduction Chapter Web proxy cache What is an Intel NetStructure Cache Appliance?Why use this caching appliance? Flexible cache architecture Intel NetStructure Cache Appliance features Broad protocol support Secure, single-point administrationMultithreading process support High-speed caching To find out about … See … How to use this guideSnmp Network Management Performance reportingPage Getting Started Starting the system for the first time Controls and physical features on your system Command-line interface‚ on Hhmmss Getting Started Accessing the Manager UI Dashboard Using Monitor and Configure mode Monitor mode frame Configure mode frame Verifying that caching works Using online helpAccessing the command-line interface Changing passwordsPage Monitoring Appliance Performance Using the Dashboard Accessing monitor pages Alert light Condition Description Resolving alarmsDashboard alert lights Exposing node detail Changing the selected node Using the Node Using the ARM Using the GraphsUsing the Protocols Using the Cache Using the Mrtg Using the Other Configuring the Appliance Using the Server Basics Accessing configure pages Setting general options NetStructure Cache sectionOption Description What are virtual IP addresses? Setting Web management optionsSetting virtual IP addressing options Using virtual IP addressing for node failover Adding entries to the Virtual IP address list Setting browser auto configuration options Setting throttling of network connectionsConfiguring load-shedding Enabling Snmp agents Option Definition Configuring Http Configuring Nntp Name and port see Option Definition FTP Configuring FTP Cache activation Freshness Storage For IMS If Modified Since revalidation requests Following table describes the variable conﬁguration options Variable content Using the Security Using the RoutingLink displays the Change Administrator’s Password Setting Http parent caching options Establishing ICP peers Setting ICP options Field Description Option Description Setting server accelerator options Using the Host Database Checking transparencyChecking Wccp Configuring the host database Another invalid hostname message to the user Using the Snapshots Configuring DNS Reaching the Snapshots Using the Command-Line Interface Starting the command-line interface Using the appliance after initial start-upStarting the appliance the first time To do this Do this Navigating the command-line interface Changing network addresses configuration Using the setup menu Changing the controller speed and transmission mode Changing the DNS address and domain nameChanging the gateway address Using the main menu Configuring time zone settingsConfiguring date and time settings Viewing current network address settings Checking the status of the Server and Manager Starting the applianceStopping the appliance Viewing and maintaining versions of the software Installing a new version of the appliance software Application upgrade Patch upgrade OS/Application upgradeRunning a different version of the appliance software Deleting a version of the appliance software Clearing statistics Halting the System Rebooting the System Resetting to factory settings Using the config menuPreparing a cache disk Setting general controls Configuring Http options Configuring protocol options Configuring Nntp options Conﬁguring Nntp servers Tag Description Following table describes the tags you can use in a rule Tag Description Examples Conﬁguring Nntp access If access is Authenticator is User is Pass is Following table lists the access directive options Configuring FTP options Configuring Secure Socket Layer SSL port Primary Destination Allowed Value Setting filter rules Action Value Secondary Specifier Allowed Value Setting remap rules Target Enabling caching for different protocols Configuring the cache Setting object freshness options Setting disk storage options Following table shows the options Configuring caching rules Request URL method use one of the following Destip=112.12.12.12 scheme=ftp action=never-cache Controlling client access to the appliance Configuring security options Controlling access to the Manager UI Configuring routing options Configuring and maintaining ICP peersViewing and modifying ICP rules Following table describes each ﬁeld Mcttl Example Enabling and disabling ICP Viewing current ICP settings Setting the ICP port number Setting the ICP query timeoutEnabling and disabling multicast in ICP Controlling parent proxy caching Action Tag Allowed Value Secondary Specifiers Allowed Value Action Tag Allowed Value Configuring Wccp options Enabling and disabling transparent redirection Configuring the Adaptive Redirection Module ARM Rule Description Configuring ARM bypass rules Rule Format Bypass rules have the following format Configuring load-shedding options Configuring the host database options Option Description Configuring logging options Progress Using the monitor menuViewing Node statistics Statistic Description Cache Statistics Description Viewing Protocol statisticsStatistic Description Network Server Statistics Description Client Statistics Description Operations Statistics Description Queries OriginatingFrom this Node From ICP Peers Viewing Cache statistics Viewing Other statistics Statistic Description Using the expert menu Using the save menu Using the load menuUsing the logoff menu Troubleshooting Problems Rebooting your system from the CLI Rebooting your system Upgrading software Page Appendix a Caching Solutions and Performance Day in the life of a cache request Web proxy caching Cache miss Ensuring cached object freshness Last-Modiﬁed / Date header test Revalidating objectsHttp object freshness tests Expires header test Default test Deciding whether to serve Http objectsRevalidate rules Configuring Http revalidation Configuring Http freshness options Configuring Http cachability Caching Http alternatesTo cache or not to cache? Directive source Caching directives Transparent proxy caching Interception strategies Serving requests transparently Using a layer 4-aware switch to filter transparency requests Using a WCCP-enabled router for transparency Using policy-based routing to filter transparency requests ARM redirection Using a router to ﬁlter Http requests Adaptive interception bypass Appliance adaptive bypassMore about bypass rules Destination bypass Configuring bypass optionsStatic and dynamic adaptive bypass Source bypass Server acceleration Advantages of server acceleration How server acceleration worksRetrieving requested documents Whereas the corresponding proxy request would look like this Web server redirects Understanding server acceleration mapping rules User Request Translated Request Examples of rules and translations User Request Origin Server Header Translated Header Http cache hierarchies Understanding cache hierarchies Miss ICP cache hierarchies Bombay Nntp cache hierarchies News article caching Appliance as a news server Appliance as a caching proxy news serverSupporting several parent news servers Several servers supplying different groups Blocking particular groupsClustering Several news servers supplying the same groups Pull the overview information for speciﬁed groups Maintaining the cache updates and feedsTransparency Posting Take a partial feed push for speciﬁed groups Configuring Access controlPull the articles for speciﬁed groups Dynamically subscribe to speciﬁed groups Carrier-class architecture Self-tuning DataFlow coreObeying Nntp control messages Client bandwidth throttling Fast space reclamation Fine-grained parallelismRaw-disk object store Alias-free caching Fast kernel packet engine AlarmsAdvanced protocol features High-availability Monitor Dashboard Virtual IP failover Node fault tolerance Expansion capabilitiesLoad shedding Centralized administration Client ACL Page Appendix B Error Messages Title Code Description Html messages sent to clients Appendix B Error Messages 153 Message Description Standard Http response messages Appendix B Error Messages 155 Page Glossary DNS ISP POP Wccp Page Index News server features