So then, is the Web server down? Maybe, but it could also be that Window Firewall on the Web server is turned on and is blocking incoming ICMP ECHO REQUEST packets (which it actually does by default ...

Unlike other shifts in IT, the broad view of uptime is well understood. What has many IT pros confused is the myriad of options that exist to ensure the availability of their applications and achieve ...

Exchange Server 2010 incorporates a number of high-availability features that system admins will find useful, including a new database availability groups (DAG) feature. Mailbox databases and the data ...

DBAs have many options for how to ensure high availability (HA) for SQL Server. Some of these options are available in the different versions and editions of SQL Server itself. Some are available in ...

High Availability (HA) refers to the design and implementation of systems that are operational and accessible without significant downtime. HA systems are engineered to overcome failures automatically ...

Higher levels of availability have become all the rage. The days of service-level agreements (SLAs) with explicit definitions of RPO (recovery-point objectives) and RTO (recovery-time objectives) may ...