Compared with IMSS 7.1, IMSS 9.1 uses a different database schema for policy event logs, quarantined messages and archived messages. Therefore, data transfer is done both during and after upgrade. IMSS 9.1 transfers data generated within 24 hours during the upgrade, but transfers data older than 24 hours after the upgrade. That is, data generated within 24 hours before upgrade will be shown immediately after the upgrade, while data older than 24 hours will not be shown immediately.
The data transfer status can be found in the notification area of the Dashboard screen. Generally, the data transfer time is determined by the database size of IMSS 7.1. For example, sometimes it takes 2.5 hours to finish data transfer.
Note
Note
Before upgrading, stop your email traffic and make sure the policy event logs have been imported to the database. Otherwise, logs that are not imported will be lost during upgrade. If the log import is completed, the size of the polevt.imss.latesttime file recorded in /INSTALLPATH/imss/bin/policy_event_bookmark will be the same as the actual size of the file under /INSTLLPATH/imss/log.