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Recommended Server Technology For 2009
By Craig Borysowich
Expert Author
Article Date: 2009-01-06
The specified AT&T servers perform these primary functions:
1.1. AT&T/NCR UNIX Based Servers - Hardware
· Database functions. Supports the on-line/batch processing of the User Database, Billing Database, Search Indices and Master Image Index Database for the XXXXX application. This includes textual information containing user profiles, billing activity, search indices, and index information stored for image pointers.
· Application data retrieval functions. Supports the RPC based retrieval of textual title information from XXXXX.
· Image cache functions. This includes the ability to provide NFS services to the print and fax servers and provide a staging area for image transfer to the remote client workstations. The subsystem has been designed to provide high speed intra-server image transferral by creating two or three Ethernet segments to each server to increase the overall aggregate bandwidth of the network.
· Input Functions. Accept data from external inputs such as registry inputs and registry SI inputs.
· Availability. The AT&T servers in conjunction with LifeKeeper and RAID have been designed to operate at over 99.5% availability. This relates to an average outage time of 2.4 minutes per 8 hour working day.
1.1.1. AT&T/NCR UNIX Based Security/Load Balancing Server
The Security/Load Balancing Server is an AT&T 3431 server with the following basic configuration.
2 * 90 MHz CPUs
128 MB RAM
2 * 1Gbyte drives for O/S, application, and logging
3 * 10 Mbps 10Base-T Ethernet adapters
1 * dual SCSI controller card
1 * 4mm DDS2 tape drive (for backup)
1 * 1/4" tape drive for loading O/S
3.5" floppy
17" monitor for machine administration (Xwindows based)
External UPS
1.1.2. AT&T/NCR UNIX Based Application Server
An Application Server is an AT&T 3455 XP server with the following basic configuration.
4 * 90 MHz CPUs with 4 MB secondary cache per CPU
512 MB RAM
2 * 1 Gbyte drives for O/S, system overhead
4 * 2 Gbyte drives for Application software, Application overhead
3 * 10 Mbps 10Base-T Ethernet adapters
1 * 4mm DDS2 tape drive (for backup)
1 * dual SCSI controller card
1 * 1/4" tape drive for loading O/S and software
3.5" floppy
17" monitor for machine administration(Xwindows based)
Internal UPS
1.1.3. AT&T/NCR UNIX Based Database Server
The Database Server and its backup are both AT&T 3475 XP servers with the following basic configuration.
4 * 90 MHz CPUs with 4 MB secondary cache per CPU
512 MB RAM
2 * 1Gbyte drives for O/S, system overhead
3 * 10 Mbps 10Base-T Ethernet adapters
2 * 4mm DDS2 tape drives (for backup)
3 * dual SCSI controller card
1 * 1/4" tape drive for loading O/S and software
3.5" floppy
17" monitor for machine administration(Xwindows based)
Internal UPS
The AT&T 3475 series of servers is identical to the 3455 series but comes bundled with the LifeKeeper software for a more economical pricing structure. The servers are configured identically to operate at an acceptable capacity during failure periods. LifeKeeper requires that the same number of Ethernet cards be available for switchover. The RAID disk array will be shared between the two servers increasing the reliability of the system and offering a cost effective solution to the mandatory and stringent availability and reliability requirements.
A shared RAID sub-system for the Database software, overhead and data is also required.
RAID Disk Array 6298 with 21 Gigabyte Disk storage.
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About the Author:
Craig Borysowich has over 18 years of Technology Consulting experience with both public and private sector clients, including ten years in Project Leadership roles. His extensive background in working with large scale, high-profile systems integration and development projects that span throughout a customer’s organization allows him to help consulting organizations world-wide to deliver better quality projects more consistently.
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