as the CBM-NET servers, to make the CBM-NET system redundant. At that point, CBM-NET at the DR site can provide the same service level as ➢ the one at the production site. (2) Options of disaster recovery system configuration In the current situation, the business data is backed up to LTO tape daily as a data backup measure. However, there is no disaster recovery measure for CBM-NET Phase 1. CBM only has one data center in Yangon. CBM considers using the server room at the CBM Nay Pyi Taw Head Office for the DR data center. CBM aims not only to have a data backup at the DR site but also to have a system so that they could continue their business in the event of a disaster. (A) Backup/Standby option There are some options to define the system design for DR. Hot standby is a better way as shown in the following comparison table. Table 3-17 Backup/Standby options Option Hot standby Brief description • • • • DR site is a duplicate of Production site. All HW/SW/NW are installed and configured. Data is mirrored continuously from Production site to DR site. System in DR site is up and running. Cost Expensive Tasks for recovery • Activate network access Downtime Evaluation Short ○ Warm standby • • • Remote site (data center) is prepared. HW/SW/NW is installed and configured. Back up tapes are sent periodically from Production site. • • • Restore data from tape Start application Activate network access △ Cold standby • • • • Remote site (data center) is prepared. HW/SW/NW is installed and configured. Power to system is switched off. Back up tapes are sent periodically from Production site. • • • • Switch power on Restore data from tape Start application Activate network access × Remote data backup only • • Data backup is stored at remote location. No HW/SW/NW for application is installed. • Prepare location for HW/SW/NW installation Procure the equipment Install and configure HW/SW/NW Restore data from tape Start application Activate network access × Cheap • • • • • Long Source: Preparatory Survey Team (B) Data Replication option There are also some options for data replication between the production site and DR site. Replication by database server is a much better way for CBM-NET. 62