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TRANSCRIPT
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Hierarchical Storage Management
Concepts and Implementation
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Rob BennettAsia Pacific Global Response Team
Tivoli Storage Management
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AbstractThis presentation will provide an introduction to space management as implemented by Tivoli Storage Manager.The speaker will compare and contrast the recently released HSM for Windows with the established UNIX based TSM for Space Management product set.
• Included in this discussion are the issues to consider during Installation and Implementation.
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Agenda
• HSM Concepts• Supported Platforms• Compare Windows HSM with UNIX HSM• Implementation Considerations• Questions
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Concepts
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Products
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Terminology
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Stub Files
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Supported Platforms
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Support Entitlement
To receive your full support entitlement, ALLelements of the Tivoli solution must be currently supported by the originating vendor.
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HSM Elements Affecting Support
Operating SystemVxFS if neededHSM Client
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Most Common Support Gotchas
• Windows 2000 is EOSImplement HSM on Windows 2003 or later
• VxFS 3.4 and VxFS 3.5 are EOS on SolarisImplement HSM using VxFS 4.1 or later.
• VxFs 3.5 is still supported on HP-UX 11.
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AIX Requirements• AIX 5.2 64 bit or later• Java Runtime 1.4.0
Please review the product readme for the latest information.
The HSM client for AIX GPFS and the HSM client for AIX JFS2 cannot be installed on the same machine.
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HP-UX Requirements• HP-UX 11i v1 • Veritas file systems (VxFs) 3.5 with
performance patch
Please review the product readme for the latest information.
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Linux Requirements
• Red Hat Enterprise Linux 3.0• SUSE SLES 8• GPFS 2.2• Java JRE 1.4.1, or later
Please review the product readme for the latest information.
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Solaris Requirements
• TSM client 5.3.2 or later• Sun Solaris 8 32bit and 64bit kernel mode• Sun Solaris 9 32 bit or 64bit kernel mode• Sun Solaris 10• Veritas VxFS 4.2
Please review the product readme for the latest information.
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Windows Requirements
• Windows 2003 Server• Windows 2003 Enterprise Server (32-bit)• NTFS Version 5
Please review the product readme for the latest information.
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Product Comparison
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Implementation Considerations
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Optimal Environment• HSM should be used in an environment, where
the migrated files, are not used regularly. • Files that are needed frequently should not be
migrated at all. • The file system needs to be large enough to
hold all regularly used files.
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Differences between the UNIX clients
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Migration Policy
• TSM HSM for Windows only checks at the time of last access and is not sensitive to file size.
• Files are usually not worth migrating if their size is quite small (e.g. less than 1 MB) .
• TSM HSM for UNIX enables migration to balance file size and time of lastaccess (either one or a weighted combination of the two).
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Threshold Migration, Demand Migration
• TSM HSM for Windows migration is done via regularly scheduled background processes and does not automatically adjust to usage spikes.
• Active administration is required to assure that TSM HSM for Windows managed file systems do not overflow.
• TSM HSM for UNIX constantly monitors file system space usage, and automatically begins migrating files if the threshold (default 90%) is exceeded.
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TSM Server Reconciliation• TSM HSM for Windows requires an
administrator to query the different versions of migrated files stored on the TSM server and to manually delete those no longer desired.
• TSM HSM for UNIX schedules periodic reconciliation processes to remove objects from the TSM server when they no longer map to files in HSM client file systems.
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TSM Backup / Archive Client Integration
TSM Backup/Archive and TSM HSM for UNIX clients are tightly integrated. TSM backup recognizes TSM HSM migrated files, and will clone them on the server when making a full backup (also known as an “inline copy”).
• A full backup of a TSM HSM for Windows managed file system is not possible. TSM HSM for the Windows administrators to perform a full backup before installing TSM HSM for Windows, and subsequently, to backup files before they are qualified for migration.
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Recent New Features
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Partial File Recall
• Starting with TSM v5.2.2 the AIX GPFS HSM client and with TSM v5.3.0 the Linux GPFS HSM are supporting the new recall mode called partial file recall.
• Partial file recall mode recalls a portion of a migrated file. This avoids having to recall an entire, potentially large file, when only a small portion of the file is required by an application.
• An example is Digital Media-type customers.
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Streaming Recall• Starting with TSM v5.2.0 some HSM clients are
capable of recalling files in the so called streaming mode. After recalling the beginning of the file, an application can read this data, while the rest of the file is still being recalled.
• Useful for video applications.
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GPFS 2.3 support
• Starting with TSM v5.3.2 the AIX and Linux GPFS HSM client supports GPFS 2.3.
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HSM Java GUI
• With TSM v5.3.2 the new HSM Java GUI is available for all HSM Unix platforms.
• This GUI is also available for Windows users to administer Unix HSM clients.
• The GUI can cannot connect to any HSM client without first having to login to each HSM system.
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LAN-free migration/recall
• The AIX GPFS HSM (5.2.2 or later) and Linux GPFS HSM client (5.3.0 or later) support the migration and recall of files using a LAN-free path.
• Because files will be moved directly to tape, enough tape drives are available including also tapes for backups, TSM server migrations, etc.
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Questions?
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Thank You
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