Resource-based boot sequence
A computer-implemented method, for booting a computer system, that provides a list with entries of startup processes. Each startup process defines a resource of the computer system. For each startup process a requirement is defined. The method further comprises fetching one of the entries of the list with entries of startup processes; determining whether the requirement is satisfied for the one of the entries of the list with entries of startup processes; fetching, in case the requirement is not fulfilled, a next one of the entries of the list with entries of startup processes; starting, in case the required resource is fulfilled, the startup process; and repeating the fetching a next one of the entries, the determining and the starting until all startup processes of the list of startup processes have been started.
1. A computer system for booting a computer system, comprising:
one or more computer processors;
one or more computer readable storage media;
computer program instructions;
the computer program instructions being stored on the one or more computer readable storage media for execution by the one or more computer processors; and
the computer program instructions comprising instructions to:
produce an extended boot sequence table (BST-E) with respect to a plurality of startup processes, where for each startup process, the BST-E includes a computer system resource requirement;
determine, with respect to each startup process, whether a corresponding computer system resource requirement is satisfied;
for each startup process of the plurality of startup processes, on condition the corresponding system resource requirement is satisfied, start the startup process;
on condition the corresponding system resource requirement is not satisfied, place the startup process in a wait status;
receive a trigger indicative of a resource becoming available, the resource satisfying a computer system resource requirement for a corresponding startup process that is in the wait status; and
remove the wait status from the corresponding startup process.
2. The computer system of claim 1 , further comprising program instructions to:
start the corresponding startup process.
3. The computer system of claim 1 , wherein the computer system resource requirement is defined by an explicit configuration setting.
4. The computer system of claim 1 , wherein the computer system resource requirement is:
defined by a measurement or calculation; and/or
a minimal exclusively available resource.
5. The computer system of claim 1 , wherein the computer system resource requirement is shared among processes.
6. The computer system of claim 1 , wherein the computer system resource requirement is defined by a policy defining a sequence of depending processes, priorities, or weights.
7. The computer system of claim 1 , wherein the computer system is a physical computer system or a virtual machine.
8. The computer system of claim 1 , wherein the computer system resource is characterized by a type and a quantity.
9. A computer program product for booting a computer system, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions being executable by a computing system to cause the computing system to:
produce an extended boot sequence table (BST-E) with respect to a plurality of startup processes, where for each startup process, the BST-E includes a computer system resource requirement;
determine, with respect to each startup process, whether a corresponding computer system resource requirement is satisfied;
for each startup process of the plurality of startup processes, on condition the corresponding system resource requirement is satisfied, start the startup process;
for each startup process, on condition the corresponding system resource requirement is not satisfied, place the startup process in a wait status;
receive a trigger indicative of a resource becoming available, the resource satisfying a computer system resource requirement for a corresponding startup process that is in the wait status; and
remove the wait status from the corresponding startup process.
10. The computer program product of claim 9 , further comprising program instructions to:
start the corresponding startup process.
11. The computer program product of claim 9 , wherein the computer system resource requirement is defined by an explicit configuration setting.
12. The computer program product of claim 9 , wherein the computer system resource requirement is:
defined by a measurement or calculation; and/or
a minimal exclusively available resource.
13. The computer program product of claim 9 , wherein the computer system resource requirement is shared among processes.
14. The computer program product of claim 9 , wherein the computer system resource requirement is defined by a policy defining a sequence of depending processes, priorities, or weights.
15. The computer program product of claim 9 , wherein the computer system is a physical computer system or a virtual machine.
16. The computer program product of claim 9 , wherein the computer system resource is characterized by a type and a quantity.