HP 3000 Manuals HP 3000 Manuals
Chapter 6 Archiving Strategies Efficient analysis of system performance depends on how easily it is to access the performance data you collect. If disc space is not limited, you can keep several years of performance data online. Since usually you can analyze only the most recent data, you do not have to allocate much disc space to collected data. Use the EXTRACT program to specify the type and amount of log file data you will need for later performance analysis. The best procedure is to extract desired data periodically and summarize it to reduce disc space, if necessary. Release disc space by placing the data into one or more extracted files and transferring them to magnetic tape for offline storage. Access the archived data by using RESTORE to bring the file online. You can either access the data directly, as a remote file, or EXTRACT the restored extracted file into another data subset before transferring it to your PC's local disc. The EXPORT function is not recommended for archival use because Performance Collection Software programs cannot process data in export format. This chapter discusses archiving techniques and a recommended archiving strategy.