HP Nonstop Servers Sync-Time User Guide
For data centers, it is possible to implement an accurate, reliable, long-term, automated solution to synchronize the system time across all the production HP Nonstop servers that are used primarily in a distributed processing environment. Synchronizing the system time is an important aspect in such a distributed processing environment in order to maintain the integrity of transactions.
This document describes the inner workings of a solution called SYNC-TIME, designed and developed by Genesys Solutions, Inc. This solution meets all the requirements put forth by our customers. These requirements are explained below.
Requirements:
1. The proposed solution must run continuously on each HP Nonstop server and while doing so, it must monitor and compare the system time to a common accurate time server located external to the system
2. When the system time gradually falls outside a defined acceptable range (say plus or minus one second) or at certain set intervals (daily, weekly or monthly), the proposed solution must re-set the system time to the common external time
3. The proposed solution must allow for the operations department to monitor its functions through the use of EMS logs as well as SNMP messages
4. There should be a mechanism built into the proposed solution that can provide a real-time comparison of the actual system time on all the production systems along with the time on the external server so that it is possible to verify that the proposed solution actually works
5. In a normal operations environment, the proposed solution must run in a fully automated fashion, requiring no manual intervention
6. The proposed solution must be easily expandable to more HP Nonstop servers as needed
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