Distributed Replicated Block Device (DRDB) implementation on cluster storage data migration

Data Center systems are required to have high availability in order to meet the continuing needs of the user. If the server or application in which a failure or require maintenance, the virtual machine will be migrated to another server in the cluster are still available. The role of shared storage is very important here to keep a virtual machine that can continue the work and do not lose data on the destination server. This study seeks to implement virtualization at the server cluster system uses a virtual machine on Proxmox VE and Distributed Replicated Block Device (DRBD) as shared storage. Implementation is done by using two nodes, and made a comparison with two other nodes in the cluster system that does not use shared storage. Shared storage works by synchronizing and replication of virtual machine data that can then migrate online. The use of shared storage will affect virtual machine performance, especially on the speed of the disk during the process of sending and receiving data, and the availability of services. Measurement of downtime during the migration to test the success of the system. Testing the TCP connection is made to ensure the network throughput and connection test results compared to test disk performance.