example of transaction processing system

Example of transaction processing system drivers#
Example of transaction processing system manual#
Example of transaction processing system full#
Example of transaction processing system portable#

backup of selected files (based on date/size/type), optimal compression, encrypt backup and schedule backup. definition of specialised backup software configured to enforce backup procedure. large organisations maintain complete organisational copies of entire system at remote locations through online communication lines to remote site. not viable for backup to tape in terms of capacity, quantity and moving disks in and out of drives definition of online backup systems automated backup process for individuals and small businesses by managing secure storage at secure remote site. used for offsite storage definition of optical media multiple DVDS-RWs for full, 1 for partial.

Example of transaction processing system drivers#

improves fault tolerance as drivers replaced without affecting system definition of hard disks externally connect through USB or ethernet networks.

robotic system to automate tape libraries.

Example of transaction processing system portable#

definition of magnetic tapes light, portable and no complex electronics, long term and off site. foreword recovery: backup to recover as recently and logs to recreate loss data up until system failure. backward recovery: undoes unwanted changes definition of recovery testing testing backup by restoring files onto temporary directory to ensure backup works

Example of transaction processing system full#

fast saving timeĭifferential backup: backup all files changed since last full backup. Incremental backup: before incremental, full backup needed, made at least daily. Impractical to perform regularly as it takes a long time and large amounts of storage can extend to great grandfather definition of offsite storage storing backup seperate from main system.įor example hard drives at employees house definition of secure on site storage backup location close to system - faster access but riskier and need extra precaution what are the full and partial backups -Full backup: complete copy (program files) regularly. definition of grandfather, father and son data backup most commonly used rotation scheme involving 3 generations data is normally stored in a database or data warehouse and needs well designed backup and recovery procedures. batch: cheque clearance what type of transaction is a credit card transaction batch processing what is the storage for a database and files -TPS requires efficient method of storage and retrieval of data. non web based: point of sale, library loan system Today: most TPS are based on 1+RBMS and client apps to meet organisations specific needs what are the types of transaction processing system -web based: reservation system, internet banking

Example of transaction processing system manual#

what is the historical significance of transaction processing as the first type of information system 1950's: clerks for manual processes in TPS replaced by computersġ980's: TP apps developed for each individual organisation was replaced by DBMS in real systems, requires all changes written to permanent or secondary storage before transaction is truly committed. Durability: ensures committed transactions permanent.

for example, record lock and two phase commit as data is in a inconsistent state during processing. Isolation: process data without interfering with or influenced by other processes currently executing. all data accounted and each step of transaction carried in same way so data is correct Consistency: transaction uses data from 1 consistent state and after, data left in a consistent state. simplified if unique identifier available across all systems, but raises privacy concerns definition of a resource manager keeps track of all data in transaction and allows terminal access for different data what does it mean if the ACID test is passed data integrity has been achieved What are the ACID properties -Atomicity: either completed successful or none at all Definition of data verification data collected matches and continues to match source.