Mechanism for facilitating spin mode-based dynamic updating of application servers in an on-demand services environment

A database system-implemented method comprising:

• retiring, by and incorporating into a database system, one or more computing devices from a cluster of computing devices for upgrading from a first version to a second version;
• dynamically holding, by the database system, in a wait stage, one or more requests to be processed by the second version while the one or more computing devices are being upgraded from the first version to the second version;
• and
• selectively routing, by the database system, upon upgrading the one or more computing devices, the one or more requests from the wait stage to the one or more computing devices for processing by the second version.

An apparatus comprising

• selection and retirement module to retire one or more computing devices from a cluster of computing devices for upgrading from a first version to a second version;
• and
• spin mode module to dynamically hold, in a wait stage, one or more requests to be processed by the second version while the one or more computing devices are being upgraded from the first version to the second version,
• wherein the spin mode module is further to selectively route, upon upgrading the one or more computing devices, the one or more requests from the wait stage to the one or more computing devices for processing by the second version.

A machine-readable medium having stored thereon instructions which, when executed by a machine, cause the machine to:

• retire one or more computing devices from a cluster of computing devices for upgrading from a first version to a second version;
• dynamically hold, in a wait stage, one or more requests to be processed by the second version while the one or more computing devices are being upgraded from the first version to the second version;
• and
• selectively route, upon upgrading the one or more computing devices, the one or more requests from the wait stage to the one or more computing devices for processing by the second version.