do you need to run 24/7? so how do you do system maintenance? “spiral development” with advanced...

Do You Need To Run 24/7?

• So How Do You Do System Maintenance?

“Spiral Development”

With Advanced Traffic Control, Inc.

Needed: A Development Strategy That Accounts For Errors

• Maintenance changes to software that aren’t perfect the first time

• Device replacements with newer versions that don’t run with the old drivers

• “Service Packs” that do more harm than good.

• Software upgrades that won’t read old files.

You’re Going To Need More Than One System.

• These errors will cause downtime, because even a system reboot causes significant downtime.

• These errors will cause an indeterminate amount of downtime.

The Problem With Hardware Fault Tolerance

• Updates to hardware fault tolerant systems by definition effect the entire configuration.

• The entire configuration looks like a single computer, so a “Blue Screen Of Death” is still a fatal system error.

Spiral Development

Original SystemOriginal System

Backup

Modified SystemBackup

Modified SystemTested

New Version A

Original SystemAs Backup

Backup UpdatedTo New Version

Modified SystemBackup

Modified SystemTested

Version A SystemAs Backup

Upon Failure

Controlled

Failover

ControlledFailover

Want To Know More?• Write or Visit Us:Advanced Traffic Control, Inc.4811 Lyons Technology Parkway #7Coconut Creek, Florida, 33073• Call UsTelephone: (954) 428-9100 Toll-Free 1-866-242-4487 [866-atc4its]• Check our web sitewww.atc4its.com• Email Us.info@atc4its.com