Systems and methods to improve power efficiency in hybrid storage clusters

A method comprising:

• providing expected I/O performance and power leakage of various memory technologies in at least one hybrid type system;
• providing constraint functions of an application (g(x, y)) including at least one of an performance tolerance and access patterns of the application, wherein the access patterns are either sequential or random;
• determining an optimization function to maximize I/O performance and minimize power leakage for storing the application, based on the constraint functions of the application;
• and
• selecting a computing system that possesses a memory technology to be used to achieve the performance I/O requirement with minimum power leakage identified in the determining step and storing the application on the memory technology.

A computer program product comprising a computer usable storage medium having readable program code embodied in the storage medium, the computer program product includes at least one component operable to:

• determine at least one of a performance tolerance and access patterns of a client application;
• determine an optimization function to maximize I/O performance and minimize power leakage for storing the client application in a memory technology, based on the performance tolerance and access patterns of the client application;
• and
• select a computing system that possesses the memory technology to be used to achieve the performance I/O requirement with minimum power leakage identified in the determining step.

A computer system for allocating memory, the system comprising:

• a CPU, a computer readable memory and a computer readable storage media;
• first program instructions to monitor access patterns of an application;
• second program instructions to determine an optimization function to maximize I/O performance and minimize power leakage for storing the application in a memory technology, based on the access patterns of the application;
• third program instructions to select a computing system that possesses the memory technology to be used to achieve the performance I/O requirement with minimum power leakage identified by the second program instructions and based on a service level agreement with a client;
• and
• fourth program instructions to store the application in the memory technology, wherein the optimization function comprises:
• a set up of a constrained optimization problem to choose levels of one or more variables, [x1, x2, . . . , xn] in order to optimize a value of a function f [x1, x2, . . . , xn] subject to constraints g1 [x1, x2, . . . , xn], wherein
• the one or more variables to be optimized include:
• f(x):
• Client Read-Write Performance, and
• f(y):
• Power consumption and leakage;
• and
• the constraints include:
• g(x):
• performance tolerance and access pattern behavior;
• and
• g(y):
• available memory technology,
• where g(x,y) is the constraint function;
• u=f(x,y) (1)
• subject to
• g(x,y)=c;
• and (2)
• df=fxdx+fydy=0;
• (3)
• a total differentiation of the constraint function is given as:
• dg=gxdx+gydy=0;
• and (4)
• (fx+ëgx)dx+(fy+ëgy)dy=0;
• (5)
• wherein equation (5) implies:
• fx+ëgx=0;
• and (6)
• fy+ëgy=0;
• (7)
• wherein required stationary points of f(x,y) subject to constraints (2) is provided by solving three equations (2), (6) and (7) for three unknowns x, y and ë,
• the first, second, third and fourth program instructions are stored on the computer readable storage media for execution by the CPU via the computer readable memory.

A method of deploying a system for allocating memory comprising:

• providing a computer infrastructure, being operable to:
• provide expected I/O performance and power leakage of various memory technologies in at least one hybrid type system;
• provide constraint functions of an application including performance tolerance and access patterns of the application;
• determine an optimization function to maximize I/O performance and minimize power leakage for storing the application, based on the constraint functions of the application;
• and
• select a computing system that possesses a memory technology to be used to achieve the performance I/O requirement with minimum power leakage identified in the determining step and storing the application on the memory technology.