Selecting a subset of storage units in a dispersed storage network
A method for execution by a computing device of a dispersed storage network includes obtaining resource information for a subset of storage units of a storage unit pool. W available storage units of the storage unit pool are identified in response to receiving a store data request. W choose S combinations of selecting S number of storage units of the W available storage units are identified. A plurality of rating levels is calculated based on the resource information, where each of the plurality of rating levels are assigned to a corresponding combination of the W choose S combinations. One combination of the W choose S combinations is selected based on the plurality of rating levels. Storage of data of the store data request is facilitated utilizing the S number of storage units of the selected one combination.
1. A method for execution by a computing device that includes a processor, the method comprises:
receiving a store data request;
identifying a set of available storage units of a storage unit pool;
determining a selected subset of the set of available storage units, having a number of storage units, by:
calculating a plurality of rating levels based on resource information corresponding to the set of available storage units, wherein each of the plurality of rating levels are assigned to a corresponding combination of a set of combinations, wherein each combination of the set of combinations includes a subset of set of available storage units that includes the number of storage units; and
selecting one combination of the set of combinations based on the plurality of rating levels as the selected subset of the set of available storage units; and
facilitating storage of data of the store data request utilizing the selected subset of the set of available storage units.
2. The method of claim 1 , wherein the resource information is obtained by interpreting a performance log.
3. The method of claim 1 , wherein identifying the set of available storage units is based on the resource information.
4. The method of claim 1 , wherein calculating the plurality of rating levels is based on access performance metrics and storage availability metrics of the resource information.
5. The method of claim 1 , wherein selecting the one combination includes identifying a highest rated combination of the set of combinations.
6. The method of claim 1 , wherein selecting the one combination includes selecting from a plurality of highest rated combinations utilizing one of: a random selection or a round-robin selection.
7. The method of claim 1 , wherein facilitating storage of the data includes:
dispersed storage error encoding the data to produce at least one set of encoded data slices; and
storing the at least one set of encoded data slices in the selected subset of the set of available storage units.
8. A processing system of a computing device comprises:
processing circuitry configured to execute operational instructions that cause the processing circuitry to perform operations that include:
receiving a store data request;
identifying a set of available storage units of a storage unit pool;
determining a selected subset of the set of available storage units, having a number of storage units, by:
calculating a plurality of rating levels based on resource information corresponding to the set of available storage units, wherein each of the plurality of rating levels are assigned to a corresponding combination of a set of combinations, wherein each combination of the set of combinations includes a subset of set of available storage units that includes the number of storage units; and
selecting one combination of the set of combinations based on the plurality of rating levels as the selected subset of the set of available storage units; and
facilitating storage of data of the store data request utilizing the selected subset of the set of available storage units.
9. The processing system of claim 8 , wherein the resource information is obtained by interpreting a performance log.
10. The processing system of claim 8 , wherein identifying the set of available storage units is based on the resource information.
11. The processing system of claim 8 , wherein calculating the plurality of rating levels is based on access performance metrics and storage availability metrics of the resource information.
12. The processing system of claim 8 , wherein selecting the one combination includes identifying a highest rated combination of the set of combinations.
13. The processing system of claim 8 , wherein selecting the one combination includes selecting from a plurality of highest rated combinations utilizing one of: a random selection or a round-robin selection.
14. The processing system of claim 8 , wherein facilitating storage of the data includes:
dispersed storage error encoding the data to produce at least one set of encoded data slices; and
storing the at least one set of encoded data slices in the selected subset of the set of available storage units.
15. A computer readable storage medium comprises:
at least one memory section that stores operational instructions that, when executed by a processing system of a dispersed storage network (DSN) that includes a processor and a memory, causes the processing system to perform operations that include:
receiving a store data request;
identifying a set of available storage units of a storage unit pool;
determining a selected subset of the set of available storage units, having a number of storage units, by:
calculating a plurality of rating levels based on resource information corresponding to the set of available storage units, wherein each of the plurality of rating levels are assigned to a corresponding combination of a set of combinations, wherein each combination of the set of combinations includes a subset of set of available storage units that includes the number of storage units; and
selecting one combination of the set of combinations based on the plurality of rating levels as the selected subset of the set of available storage units; and
facilitating storage of data of the store data request utilizing the selected subset of the set of available storage units.
16. The computer readable storage medium of claim 15 , wherein identifying the set of available storage units is based on the resource information.
17. The computer readable storage medium of claim 15 , wherein calculating the plurality of rating levels is based on access performance metrics and storage availability metrics of the resource information.
18. The computer readable storage medium of claim 15 , wherein selecting the one combination includes identifying a highest rated combination of the set of combinations.
19. The computer readable storage medium of claim 15 , wherein selecting the one combination includes selecting from a plurality of highest rated combinations utilizing one of: a random selection or a round-robin selection.
20. The computer readable storage medium of claim 15 , wherein facilitating storage of the data includes:
dispersed storage error encoding the data to produce at least one set of encoded data slices; and
storing the at least one set of encoded data slices in the selected subset of the set of available storage units.