SCO UnixWare 2.1 Technical Summary - Bandwidthco Computer ...

Online Data Manager Product Overview
Online Data Manager System Requirements
SCO UnixWare 2.1
System requirements SCO UnixWare 2.1 Application Server
Installation CD-ROM drive required
disk space 5 MB free and .5 MB free on each disk is recommended
Online Data Manager Product Description
The SCO UnixWare 2.1 Online Data Manager (ODM) provides enterprise-level storage
management that is easy and intuitive to use, yet is still provides powerful high-availability
features. Features include:
• on-line backup
• on-line administration for defragmentation,
• on-line file system expansion and shrinking
• preallocation and fixed extent sizes
• unbuffered I/O and other caching options
• additional mount options
• NFS acceleration.
One of the key features that make ODM such an invaluable tool for business critical applications
is that the majority of its administration and even changes in configuration can be accomplished
in real-time without any interruption of applications and users on the system. Large-scale
storage management procedures can be accomplished without having to shutdown or reboot the
system.
On-line Data Manager components
ODM consists of three components:
• Advanced File System (VxFS)
• Volume Manager (VxVM)
• Visual Administrator (VxVA)
The Advanced File System provides a superset of the features of the journaling filesystem
(vjfs) that is the default file system for SCO UnixWare 2.1. Vxfs has more advanced reliability
features and it supports the on-line administrative capabilities of the Online Data Manager.
Other features include:
• Intent logging (journaling) - maintains file system integrity even after cold shutdowns.
Protects system and user data.
• Synchronous writes - causes unlogged changes to be written to disk when a file is closed.
Thus once a file is closed, the data is safe.
• Extent based file allocation - an efficient file allocation scheme that allocates contiguous
disk space rather than just blocks. Thus reducing disk seek time and improving
performance.
• Dynamic i-node allocation - system i-nodes are increased on an as needed basis, requiring
no administrative intervention.
• Direct I/O support - provides a bypass to disk aching for database and transaction
processing applications for faster raw disk accesses.
• Access Control List support - ties into the advanced security features of SCO UnixWare
2.1
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