Resource allocation throttling in remote data mirroring system

A computer program product for implementing, in a primary computer system included in a remote data mirroring system that mirrors data from the primary computer system to a secondary computer system over a network, a method for controlling the utilization of a component of the network so as to facilitate mirroring, the computer program product comprising:

• a computer-readable medium carrying computer-executable instructions for implementing the method, the computer-executable instructions, when executed, causing the primary computer system to:
• create a throttle in the primary computer system, wherein the throttle defines a test and an associated action;
• apply the test defined by the throttle to the component of the network so as to compare actual usage of the component with a threshold value;
• and
• if, in response to applying the test, it is determined that the actual usage of the component has a specified relationship with the threshold value, performing the action to adjust the actual usage of the component.

In a remote data mirroring system that mirrors data from a primary computer system to a secondary computer system over a network, a method for controlling the utilization of a component of the network so as to facilitate mirroring, the method comprising:

• creating a throttle in the primary computer system, wherein the throttle defines a test and an associated action;
• obtaining a start time input for initiating operation of the throttle and a stop time input for terminating operation of the throttle, the start time and the stop time identifying the time span during which the throttle is active;
• obtaining a logical operator selection for determining when the test defined by the throttle is to be applied;
• and
• obtaining a threshold value to be used by the test;
• while the throttle is active, applying the test defined by the throttle to a writelog device configured to receive data updates so as to compare actual usage of the writelog device with the threshold value, the writelog device being in communication with a primary mirror daemon of the primary computer system that communicates with a remote mirror daemon of the secondary computer system;
• and
• if, in response to applying the test, it is determined that the actual usage of the writelog device has a specified relationship with the threshold value, adjusting the actual usage of the writelog device to avoid an underflow or an overflow condition of the writelog device.