# US 2013/0159532 A1 · Method and system for managing resources among different clients for an exclusive use

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- Number: US 2013/0159532 A1
- Document ID: US20130159532A1
- Status: Published application
- Kind: A1
- Application number: 13/720,029
- Filed: 2012-12-19
- Published: 2013-06-20
- Earliest claimed: 2011-12-19
- Assignees: Siemens Aktiengesellschaft
- Inventors: ANDREA BOERO; DAVIDE CORSO
- Web page: https://patentgrep.com/patent/US20130159532A1

## CPC

- G06F 9/5027: {the resource being a machine, e.g. CPUs, Servers, Terminals}
- H04L 47/70: Admission control; Resource allocation
- H04L 47/78: Architectures of resource allocation
- H04L 47/783: Distributed allocation of resources, e.g. bandwidth brokers
- H04L 47/821: {Prioritising resource allocation or reservation requests}
- H04L 47/822: {Collecting or measuring resource availability data}
- H04L 47/827: {Aggregation of resource allocation or reservation requests}
- G06F 2209/5011: Pool
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method and a system share resources of a server among different clients. The system has a server which contains a maximum number m of resources among which a predetermined number w of the resources are initializable for being kept ready for use by the clients and forming a pool. A communication system communicates with the clients. A managing device manages the resources. The managing device contains at least a processor and a memory. The managing device is able to change the status of the resource of the pool in dependence on an assignment of the resource to the client or a release of the resource at a time T4, to add a new resource to the pool, and to terminate the resource of the pool.

## Claims

### Claim 1

A method for sharing resources of a server among different clients, the server containing a maximum number m of resources among which a predetermined number w of the resources are initialized and kept ready for use for the clients and are contained in a pool, which method comprises the steps of:
releasing at a time T4 a resource of the server, wherein a status of the resource released being changed from “in use” to “available”;
determining a size of the pool at the time T4; and
if the pool contains p resources at the time T4, wherein m≧p>w, then terminating p−w resources among available resources of the pool if and only if a number p_u of the “in-use” resources at the time T4 is inferior to the predetermined number w; or
otherwise, maintaining the resources of the pool initialized independently of time.

### Claim 2 (depends on 1)

The method according to claim 1, which further comprises performing an allocation of the resource to a client by the further steps of:
a) receiving by the server of a client request for using one of the resources;
b) determining a number of available resources for the client in the pool; and
if at least one of the resources is available in the pool, then allocating the one resource to the client and changing a status of the resource allocated from “available” to “in use”, otherwise;
if each of the resources of the pool is “in use”, then determining if the maximum number m of the resources is used;
if the maximum number m of the resources of the server is not used, then initializing a new resource and adding the new resource to the pool;
if the maximum number m of the resources of the server is used and if a timeout is not reached, then returning to step b; and
if the maximum number m of the resources of the server is used and if the timeout is reached, then returning to the client request an error.

### Claim 3 (depends on 1)

The method according to claim 1, which further comprises prioritizing an allocation of the resource to the client or a request in dependence on a rank of the client or the request.

### Claim 4 (depends on 4)

The method according to claim 4, which further comprises setting at least one condition for allocation of the resource to the client.

### Claim 5

A system for sharing resources among different clients, the system comprising:
a server having a maximum number m of resources among which a predetermined number w of said resources are initializable for being kept ready for use by the clients in a pool;
a communication system for communicating with the clients;
a managing device for managing said resources, said managing device having at least a processor and a memory, said managing device being able to:
change a status of a resource of said pool in dependence on an assignment of said resource to a client or a release of said resource at a time T4;
to add a new resource to the pool;
to terminate said resource from the pool;
said memory containing instructions to:
determine a number p of said resources contained in said pool at the time T4, and to determine among said p resources, a number p_u of said resources that are “in use” at the time T4;
terminate p−w resources among the p−p_u available resources of said pool if and only if at said time T4, m≧p>w and p_u<w; and
maintain said resources of said pool initialized independently of the time if at said time T4, p≦w or p_u>w.

### Claim 6 (depends on 5)

The system according to claim 5, wherein said server has a databank with a prioritizing list of at least one of the clients or the requests.

### Claim 7 (depends on 5)

The system according to claim 5, wherein said server is able to timestamp a reception of a request.