Methods of Conversion Ipt

Methods of Conversion
Direct conversion in the library
Conversion is the process in which data is changed from the old system to the new system. This process must be planned by professional I.T. users in the library to change the old system to the new system whilst making miniature or no mistakes. Even though there are 4 types of conversion, in the Liverpool library system they use direct conversion every couple of months to ensure that the old data of customers that is not needed is removed. E.g. data of customers who have paid overdue books are no longer need but those who have not paid are still needed in the system and are copied to the new system. Even though this method of conversion is not very commonly used it is very effective in renewing the library’s system. This system works by setting a specific date in which a certain system which is the old system will stop then the new system will replace the old system after the information and data is completely copied and filtered. There is also a negative point to this method of conversion. If the new system is non operational and not running, the old system which is down cannot be used as a backup system, therefore the computer system in the library will be down until a newer system is used to replace the new non operational system.
Parallel conversion in the library
Although modern library are now starting to use the parallel method of conversion in which is greater in accuracy and less in errors. Parallel method of conversion requires more people/users to make this method work. It requires for both the old and the new system to run at the same time. Therefore if the new system is down the old system can still be used unlike the previous method of conversion in which if the new system are down the whole system are down. In this method if the new system is down the old system can be used as the backup system for the time being until the new system is repaired and operational for complete conversion to