Dell DX6004S DX Object Storage Getting Started Guide - Page 9

Copyright © 2010 Caringo, Inc.

All rights reserved

6

Version 5.0

December 2010

switches, the network connection between switches must be faster than the individual ports. Contact

your switch provider for information about proprietary software or use a mechanism such as

link

aggregation

.

2.1.4. Internet Deployments

Network security is one of the top considerations during the deployment of any service on the

Internet or within an extensive enterprise WAN. In these types of deployments, put a firewall or

filtering router in front of DX Storage to control the kind of traffic and requests that are allowed to

reach the cluster nodes.

The preceding figure shows a firewall that allows requests on TCP/80. This is the default SCSP port,

but it should be changed to match the scspport value set in the node or cluster configuration file for

the DX Storage cluster if it is something other than 80.

If the firewall is sophisticated enough to examine Layer 7 (Application Layer), or the contents of

the HTTP requests, further restrictions should be made to allow only GET, HEAD, POST, DELETE

requests. If a cluster is exposed read-only to these external clients, the POST and DELETE

requests can be blocked to prevent updates to the cluster. To prevent client access to the node

status page, the firewall should deny “GET /” requests to the cluster nodes.

Administrators should block Internet access to the Admin Console port (default TCP/90) and to

the SNMP port (UDP/161). In wide-area networks, further restrictions might be desirable to restrict

access to these services to specific administrative networks or workstations.

Anytime critical devices such as firewalls are introduced into a network architecture, they should be

deployed in redundant pairs to minimize the chance of failures that cut-off all client access.

2.2. Setting Up the Network for DX Storage

Client applications must be able to initiate TCP connections with all nodes in a DX Storage cluster

using the designated access port, typically port 80. Internally, DX Storage nodes must be able to

communicate with each other using UDP, TCP, and multicast.

The following topics in this section discuss how to set up a DX Storage cluster in a standard TCP/IP

networking environment:

•

Section 2.2.1, “Network Summary”

Section	Page
DX Object Storage Getting Started Guide	1
Table of Contents	3
Chapter 1. Welcome to DX Storage	4
1.1. Components	4
1.2. About this Document	4
1.2.1. Audience	4
1.2.2. Scope	4
Chapter 2. Network Infrastructure and Recommendations	5
2.1. About DX Storage in the Network	5
2.1.1. Sample Networks	5
2.1.2. Layer 3 Switching and Routing	7
2.1.3. Switching Hardware	7
2.1.4. Internet Deployments	9
2.2. Setting Up the Network for DX Storage	9
2.2.1. Network Summary	10
2.2.2. Recommended Infrastructure	10
2.3. Setting Up Network Services	10
2.3.1. Setting Up NTP for Time Synchronization	11
2.3.2. Setting Up DNS for Name Resolution	11
2.3.3. Preparing for Named Objects	12
2.3.4. Setting Up SNMP for Monitoring	12
2.3.5. Setting Up Network Load Balancing	13
2.4. Setting Up PXE Booting	13
2.4.1. Setting Up the DHCP Server for PXE Booting	13
2.4.2. Configuring the TFTP Server	14
2.4.2.1. Installing and Configuring TFTP	14
2.4.2.2. Creating the tftpboot Directory Hierarchy	14
2.4.2.3. Copying kernel and fsimage	14
2.4.2.4. DHCP and Boot Server Redundancy	15
2.5. Setting Up a Configuration File Server	15
2.6. Network Devices and Priority	16
2.7. Proxying the Admin Console	17
2.8. IGMP Snooping Support	17
Chapter 3. Hardware Considerations	18
3.1. Hardware Requirements and Recommendations	18
3.2. Hardware Setup	18
3.3. About Memory Effects on Node Storage	18
3.4. Stream Size Guidance	19
3.5. Adaptive Power Conservation	19
3.6. Proactive Power Conservation	20
3.7. Local Area Replication Using Subclusters	20
Chapter 4. Installing and Configuring DX Storage	22
4.1. Licensing	22
4.1.1. How Licensing Works	22
4.1.2. About licenseFileURL	23
4.1.3. About Licensed Capacity Monitoring	23
4.1.4. About Other Licensing Checks	23
4.1.5. Sample License	24
4.2. Configuring DX Storage	24
4.2.1. Editing node.cfg	25
4.2.2. Storage Volume Configuration	25
4.2.3. DHCP or Static Network	26
4.2.4. Administration Password	26
4.3. Booting DX Storage Nodes	26
4.4. Using Syslog	27

Dell DX6004S DX Object Storage Getting Started Guide - Page 9

Internet Deployments, 2.2. Setting Up the Network for DX Storage

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