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Dell DX6004S DX Content Router Setup and Configuration Guide - Page 8

DX Content Router Services

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Chapter 3. DX Content Router Services 3.1. Basic Architecture A DX Content Router lives within a DX Storage cluster but is always visible to other clusters, and perhaps to the external network at large. Consequently, it is assumed that all communication between DX Content Router services occurs over a secure TCP connection. The following diagram illustrates, at a high level, the flow of messages that takes place between two DX Storage clusters, one acting as the Primary Cluster and the other as a Disaster Recovery Cluster. Dotted lines represent local cluster communication. Solid lines represent TCP traffic over the HTTP protocol between DX Content Router services and also between storage nodes within the two independent clusters. Alternatively, if network configuration prevents direct communication between the storage nodes (such as when DX Content Router installed on a CSN), communications can be configured to route through an SCSP Proxy: Copyright © 2010 Caringo, Inc. All rights reserved 4 Version 2.2 December 2010

Section	Page
Content Router Setup and Configuration Guide	1
Table of Contents	3
Chapter 1. Introduction to DX Content Router	5
1.1. Overview of DX Content Router	5
1.2. About this Document	5
1.2.1. Audience	5
1.2.2. Scope	5
Chapter 2. Replication Topologies	6
2.1. Disaster Recovery	6
2.2. Mirrored Clusters	6
2.3. Multi-Site Disaster Recovery	6
2.4. Content Distribution	7
Chapter 3. DX Content Router Services	8
3.1. Basic Architecture	8
3.1.1. Structure of a DX Content Router Node	9
3.1.2. Publisher Service	11
3.1.2.1. Filtering UUIDs for Publication	11
3.1.2.2. Rules	13
3.1.3. Replicator Service	14
Chapter 4. Installation	15
4.1. Requirements	15
4.1.1. Operating System	15
4.1.2. 3rd Party Package Pre-requisites	15
4.1.3. Network	15
4.1.3.1. Required Communications	15
4.1.3.2. Bandwidth Requirements	15
4.1.3.3. Recommended Infrastructure	16
4.1.3.4. IP Address Configuration	16
4.2. Installing and Configuring DX Content Router Services	17
4.2.1. Installing Services	17
4.2.2. Configuring Services and Rules	17
4.3. Upgrading DX Content Router	18
4.3.1. Upgrading from 1.x	18
4.3.2. Upgrading from 2.x	18
4.4. Removing DX Content Router	18
Chapter 5. Running and Managing DX Content Router	19
5.1. Starting DX Content Router Services	19
5.2. Publisher and Replicator Shutdown	19
5.3. Customizing the Standard Rule Sets	19
5.3.1. Publish all streams on a single channel	19
5.3.2. Publish all streams on two separate channels	20
5.3.3. Publish streams with header ‘someHeaderName’ on one channel and all others except text files to a second	20
5.3.4. Complex Content Metadata Analysis	20
5.3.4.1. Filter Clause	20
5.3.4.2. Exists Clause	21
5.3.4.3. NotExists Clause	22
5.3.4.4. All Clauses	22
5.4. Using the Publisher Console	22
5.4.1. Publisher Console layout:	23
5.5. HTTP Status Reporting for Publisher and Replicator	25
5.5.1. Publisher Response	25
5.5.2. Replicator Response	26
5.5.3. Request for Source Cluster IP Addresses	27
Chapter 6. Support for Content Restoration and Fail-Over	28
6.1. Administrative Disaster Recovery	28
6.2. Content Mirroring	28
6.3. Application-Assisted Fail-Over	28
Appendix A. Content Metadata	29
A.1. System Metadata	29
A.2. Content File Server Metadata	29
A.2.1. Custom Metadata	29
Appendix B. DX Content Router Configuration	30
B.1. Publisher Configuration	30
B.2. Replicator Configuration	34
Appendix C. Enumerator API	38
C.1. Enumerator Types	38
C.2. Enumerator Start	38
C.2.1. Enumerator Start Query Arguments	39
C.2.2. Enumerator Start Response	39
C.3. Enumerator Next	40
C.3.1. Enumerator Next Query Arguments	40
C.3.2. Enumerator Next Response	41
C.4. Enumerator End	41
C.4.1. End Response	41
C.5. Enumerator Timeout	42

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Version 2.2

December 2010

Chapter 3. DX Content Router Services

3.1. Basic Architecture

A DX Content Router lives within a DX Storage cluster but is always visible to other clusters, and

perhaps to the external network at large. Consequently, it is assumed that all communication

between DX Content Router services occurs over a secure TCP connection.

The following diagram illustrates, at a high level, the flow of messages that takes place between

two DX Storage clusters, one acting as the Primary Cluster and the other as a Disaster Recovery

Cluster. Dotted lines represent local cluster communication. Solid lines represent TCP traffic over

the HTTP protocol between DX Content Router services and also between storage nodes within the

two independent clusters.

Alternatively, if network configuration prevents direct communication between the storage nodes

(such as when DX Content Router installed on a CSN), communications can be configured to route

through an SCSP Proxy: