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AMASS Overview
AMASS Version 5.3
August 2002
6-00026-01 Rev A
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Trademark Notice ADIC, AMASS, CentraVision, DAS, DataMgr, FileServ, and VolServ are either trademarks or registered trademarks of Advanced Digital Information Corporation. All other product names and identifications are trademarks or registered trademarks of their respective owners. Copyright Notice ® © 1996-2002 ADIC All rights reserved. This document is the property of ADIC. No part of this document may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated i
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READER COMMENT FORM ADIC includes this Form in an effort to provide the best possible documentation to our customers. Please take a few moments to mail or FAX your response to: ADIC Technical Publications 8560 Upland Drive Englewood, CO 80112 FAX: 303-792-2465 Email: techdocs@adic.com Question Circle One Information was complete. Agree Disagree Information was easy to find. Agree Disagree Information was easy to follow. Agree Disagree Is there anything you especially like or dislike about the
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NOTES
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Contents Preface Purpose of This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-3 Who Should Read This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-3 How This Book is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-3 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-4 Online Ar
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Accessing Storage Devices Design Maintains Data Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13 File Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14 Database Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14 Library Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14 Volume Verification . . . . . .
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Accessing Storage Devices Accessing the Storage Network 2 Local and Network Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Network Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Network File System (NFS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Accessing Storage Devices Index viii Contents 6-00025-01 Rev A
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P Preface
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AMASS Overview NOTES P-2 Preface 6-00026-01 Rev A
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AMASS Overview This book provides an introduction or high-level summary of Purpose of AMASS, ADIC’s Archival Management and Storage System This Book software application. This book is written for prospective customers as well as for the Who Should system administrator who will be using and maintaining Read This AMASS. Book This book contains the following chapters: How This Book is Chapter 1: Online Archiving with AMASS — The benefits Organized of using AMASS to archive your data Chapt
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AMASS Overview The conventions used throughout the AMASS technical books Conventions are listed below: Convention Example The word “library” usually includes “jukebox” If using HP SunSpot jukeboxes, install patch and “standalone drive” and is a generic way to 1234. reference a storage device. Screen text, file names, program names, and Request to add a new volume: commands are in Courier font. Volume group will be “20” Volume position will be “A123” The root prompt is shown as a number # su
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1 Online Archiving with AMASS
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AMASS Overview NOTES 1-2 Online Archiving with AMASS 6-00026-01 Rev A
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AMASS Overview The Archival Management and Storage System (AMASS) is a Using AMASS management tool for your storage solution. to Archive Files are archived to media stored in robotic libraries, Your Data jukeboxes, and standalone drives. The archived file system managed by AMASS is supervised by a system administrator who oversees the following components: File System - Directory information - IO activity Libraries, Jukeboxes, Standalone Drives Status of elements Drive
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AMASS Overview Backup and restore applications are usually an automatically Archive versus scheduled operation aimed at protecting original data against Backup and any kind of loss or damage. Restore The goal of archiving is usually to conserve online storage space. It is more cost effective to store infrequently accessed data on lower cost media. When applications need to read from or write to archived files, Files Viewed as the files appear as a single, mounted file system on the UNIX
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network-attached SCSI-attached AMASS Overview Documentation Set The figure below provides an overview of an AMASS-managed Overview storage solution and a reference to other books in the AMASS documentation set. For library-specific information, refer to Accessing Storage Devices. Library Offline Media For system requirements and installation steps, refer to To use offline media, Installing AMASS. refer to Managing the AMASS File System. /(root) To use standalone Standalone Drive AMASS ca
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AMASS Overview The management tool for your storage system should provide: Benefits of Using AMASS Performance Data integrity Ease-of-use Flexibility The benefits of using AMASS are described in the following table: Topic Page Database Improves Performance 1-6 Design Prevents Thrashing 1-9 Cache Optimizes Requests 1-9 Virtually Unlimited File System Size 1-10 Design Maintains Data Integrity 1-13 Increased Throughput 1-15 Tools 1-18 Flexible 1-20 AMASS keeps a File System Database, res
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AMASS Overview The following figure illustrates the concept of how the File System Database maps the file system data to the volumes in the library. Volumes contain “real” data. The File System Database contains metadata, which includes the directory structure, file attributes, media information, and storage information. Inodes AMASS File Inodes System Database Inodes map the metadata to “real” data found on the media. UNIX Server Faster Performance Because the File System Database is resid
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AMASS Overview Automated Backups Because the File System Database is extremely important, this via Cron Job information must be protected. Consequently, the amassbackup command, run from a cron job, regularly backs up both the Database and the Journal. The Journal is a transaction log of daily activity. This cron job is created when AMASS is installed. The cron job backs up the Database and Journal to a Backup Volume at 3 a.m. using the following schedule: First day of the month—Full Ba
