Dell DX6000 Application Manual
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Brand: Dell
Category: Desktop , Server , Software , Storage
Type: Application manual
Model: Dell DX6000 , Dell DX6004S , Dell DX6012S
Pages: 81 (0.65 Mb)
Copyright © 2010 Caringo, Inc.
All rights reserved iii
Version 5.0
December 2010
Table of Contents
1. Introduction to DX Storage Objects ....................................................................................... 1
1.1. Introducing Named Objects ....................................................................................... 1
1.2. Summary of Named Objects and Unnamed Objects .................................................... 2
1.3. Common Named Object Terminology ......................................................................... 2
1.4. About DX Storage Object Types ................................................................................ 3
1.5. Bucket and Object Naming Rules .............................................................................. 3
1.6. Simple Examples of Creating Buckets and Named Objects .......................................... 3
1.7. Universal Resource Identifiers (URIs) ......................................................................... 4
1.8. About Objects and Security ....................................................................................... 5
1.8.1. The Basics of DX Storage Security ................................................................. 5
1.8.2. Commonly Used Security Terminology ............................................................ 6
1.8.3. Basic Security Guidelines ............................................................................... 6
1.9. Concepts for Unnamed Objects ................................................................................. 6
1.9.1. Universally Unique Identifiers (UUIDs) ............................................................. 6
1.9.2. About Immutable Objects ................................................................................ 7
1.9.3. About Anchor Streams ................................................................................... 7
1.10. Document Typographical Conventions ...................................................................... 8
2. Connecting to a DX Storage Cluster ..................................................................................... 9
2.1. About the Primary Access Node (PAN) ...................................................................... 9
2.2. Requirements for Node Accessibility .......................................................................... 9
2.2.1. Using the DX Storage Software Development Kit (SDK) .................................... 9
2.2.2. Using Multicast-DNS (mDNS) ........................................................................ 10
2.2.3. Using DNS Round Robin .............................................................................. 10
2.2.4. Using a Pool of Static IP Addresses .............................................................. 11
2.2.5. Using a Single Static IP Address ................................................................... 11
3. Application Best Practices .................................................................................................. 12
3.1. Using the Software Development Kit (SDK) .............................................................. 12
3.2. Dynamically Locating DX Storage Nodes .................................................................. 12
3.3. Optimizing Bucket and Domain Operations ............................................................... 12
3.4. Using HTTP Client Libraries .................................................................................... 12
3.5. Handling Redirects .................................................................................................. 13
3.6. Using Range Headers ............................................................................................. 13
3.7. Multi-Threading ....................................................................................................... 14
3.8. Using Persistent Connections ................................................................................. 14
4. Introduction to the Simple Content Storage Protocol (SCSP) ................................................ 15
4.1. Mapping SCSP Operations to HTTP Methods ........................................................... 15
4.2. HTTP Overview ...................................................................................................... 16
4.3. Requests and Responses ........................................................................................ 16
4.3.1. HTTP Response Codes ................................................................................ 16
4.3.2. Redirect Responses ..................................................................................... 17
4.4. Formatting SCSP Commands for Named and Unnamed Objects ................................ 17
4.5. Undefined Responses from DX Storage ................................................................... 18
4.6. Normal Response Headers ...................................................................................... 19
5. SCSP READ ..................................................................................................................... 22
5.1. Introduction to READ .............................................................................................. 22
5.1.1. Reading With Content Validation ................................................................... 22
5.1.2. Requestion Node Status and Cluster Capacity ............................................... 22
5.2. Unnamed Object READ Details ............................................................................... 23
5.3. Normal Responses to READ ................................................................................... 23
5.3.1. Normal READ Responses for Named Objects ................................................ 23
5.3.2. Normal READ Response for Unnamed Objects .............................................. 24