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Load-balancing devices 95
9 Edit the cluster properties as described in the following table:
10 Click OK.
When configured, ClusterCATS automatically sets the state of each cluster member to
Passive and provides the load-balancing and high availability data it acquires to
LocalDirector. LocalDirector actively manages HTTP traffic across the cluster.
Using third-party load-balancing devices
Third-party load-balancing devices actively distribute load to the web servers based on
packet flow while ClusterCATS monitors JRun and ColdFusion load and availability. If
ClusterCATS detects that the server is becoming overloaded, it supersedes the
load-balancing device and redirects traffic accordingly.
This section describes how to configure a third-party load-balancing device with
ClusterCATS in the following sections:
• “Using third-party load-balancing devices in Windows” on page 96
• “Using third-party load-balancing devices in UNIX” on page 97
Field Description
Website Alias Enter the name of the virtual server (www.yourcompany.com)
you created in step 3.
LocalDirector IP
Address
Enter the IP address of Cisco LocalDirector.
DFP Agent Listen
Port
Enter the port number on which the cluster's DFP agent should
listen for incoming LocalDirector connection requests. This
should be the same port specified in the LocalDirector
dynamic-feedback as described in step 5.
Update Frequency
(sec)
Enter the frequency with which you want ClusterCATS to update
the LocalDirector with availability data.
This is typically between 5 and 30. You can enter up to 120.
As you add web servers to the cluster, set a larger value. This
minimizes the overhead of traffic to LocalDirector.
HTTP Port Enter the port number on which each cluster member listens for
unsecured HTTP requests. Enter 0 if not applicable.
HTTPS Port Enter the port number on which each cluster member listens for
secured HTTP requests. Enter 0 if not applicable.
Bind ID Enter the same Bind ID specified for the explicit (real) servers on
the LocalDirector in step 4. For ClusterCATS/LocalDirector
integration to work as intended, the server name, port number,
and bind ID combination must be the same on this ClusterCATS
Load Balance tab as on the LocalDirector box.
- Using ClusterCATS 1
- CONTENTS 3
- C o n t e n t s v 5
- ABOUT THIS BOOK 7
- Developer resources 8
- Viewing online documentation 9
- Contacting Macromedia 10
- CHAPTER 1 11
- Before You Begin 11
- ClusterCATS overview 12
- Detailed overview 13
- • A user enters a new URL 14
- • A user employs a bookmark 14
- ClusterCATS overview 5 15
- ClusterCATS components 16
- System requirements 17
- CHAPTER 2 19
- What is scalability? 20
- What is scalability? 11 21
- Load management 22
- Avoiding common bottlenecks 26
- • “What is DNS?” on page 17 27
- Zones and domains 28
- What is website availability? 33
- Common failures 34
- Website availability scenario 35
- Failover considerations 35
- What is clustering? 38
- • It uses proven technology 39
- CHAPTER 3 43
- Installing ClusterCATS 43
- Before you install 44
- Configuring server failover 48
- Configuring firewalls 48
- Analyzing web server content 49
- After you install 55
- CHAPTER 4 57
- Configuring Clusters 57
- ClusterCATS Server 58
- Creating clusters 64
- Creating clusters 55 65
- Creating clusters 57 67
- Creating clusters in UNIX 70
- 3 Click OK 71
- Removing clusters 72
- Adding cluster members 73
- Removing cluster members 75
- Server load thresholds 76
- Server load thresholds 67 77
- Server load thresholds 69 79
- Server load thresholds 71 81
- Session-aware load balancing 82
- Session swapping overview 84
- Using ColdFusion probes 87
- Using ColdFusion probes 81 91
- To remove a ColdFusion probe: 91
- Using ColdFusion probes 83 93
- Using JRun probes 94
- Using JRun probes 85 95
- To remove a JRun probe: 98
- Using JRun probes 89 99
- To add a new JRun probe: 99
- Load-balancing devices 102
- • dynamic-feedback -retry 103
- Product drop-down list 104
- Load-balancing devices 97 107
- Administrator e-mail options 110
- Administering security 113
- Administering security 105 115
- Administering security 107 117
- CHAPTER 5 119
- Maintaining Cluster Members 119
- Resetting cluster members 130
- CHAPTER 6 131
- ClusterCATS Utilities 131
- Using btadmin 132
- Using btcfgchk 136
- Using hostinfo 139
- Using sniff 140
- CHAPTER 7 141
- Optimizing ClusterCATS 141
- Using server failover 147
- Overview of metrics 148
- Load types 149
- Output variables 149
- 142 Index 152
- 146 Index 156
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