Write commands filtering

Patent metadata

Field	Value
Publication number	US-10712971-B2
Application number	US-201515757383-A
Country	US
Kind code	B2
Filing date	Oct 23, 2015
Priority date	Oct 23, 2015
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

In an example method, write commands for a solid-state storage medium having storage region are received. Selected write commands are filtered out according to criteria. The selected write commands are cached. Writing pursuant to the selected write commands is aggregated to within boundaries of one of the storage regions of the storage medium.

First claim

What is claimed is:

1. A method comprising:
receiving a set of write commands for a solid-state storage medium having storage regions;
filtering out a subset of the set of write commands according to a criterion;
caching the subset of write commands;
aggregating writing pursuant to the subset of write commands to within boundaries of one of the storage regions of the solid-state storage medium;
monitoring a total amount of data to be written pursuant to the subset of write commands currently cached; and
transmitting the cached subset of write commands to the solid-state storage medium for the aggregated writing, wherein the cached selected write commands are transmitted to the solid-state storage medium for the aggregated writing at a time based upon the total amount of data, wherein the criterion is applied to each individual write command of the received write commands and wherein the criterion comprises an amount of data to be written pursuant to each individual write command.

2. The method of claim 1 , wherein the cached selected write commands are transmitted to the solid-state storage medium for the aggregated writing at a time that is based upon a cache delay of at least one of the write commands.

3. The method of claim 2 , wherein the cached selected write commands are transmitted to the solid-state storage medium for the aggregated writing at a time that is based upon a longest cache delay of any individual cached write command.

4. The method of claim 1 , wherein said one of the storage regions has a data storage capacity and wherein the cached selected write commands are transmitted to the solid-state storage medium for the aggregated writing in response to a total amount of data of the cached selected write commands being at least 60% of the data storage capacity.

5. The method of claim 1 , wherein the received write commands are filtered, one by one, in order and as they are received.

6. The method of claim 1 , wherein the criterion comprises at least one criterion selected from a group of criteria consisting of:
application lifetime, application version, application thumbprint, pending input/output (I/O) requests, temporal patterns in I/O operation and type of file being accessed.

7. The method of claim 1 , wherein the criterion is applied to each individual write command of the received write commands and wherein the criterion applied to each individual write command comprises a lapse of time since receipt of a prior individual write command.

8. The method of claim 1 , wherein each of the storage regions comprises a smallest unit of the storage medium that may be individually acted upon during a single write cycle.

9. The method of claim 1 , wherein the criterion comprises at least one criterion selected from a group of criteria consisting of: application lifetime, application version, application thumbprint, temporal patterns in I/O operation, type of file being accessed, and type of a file access being performed.

10. The method of claim 1 , wherein the subset of write commands comprises three write commands and wherein the subset of write commands are written in less than three write cycles.

11. A solid-state storage system comprising:
a solid-state storage medium having storage regions; and
a filter driver to:
receive write commands for writing to the solid-state storage medium;
filter out selected write commands according to a criterion, wherein the criterion is applied to each individual write command of the received write commands and wherein the criteria comprises an amount of data to be written pursuant to each individual write command;
cache the selected write commands; and
facilitate aggregated writing of data, pursuant to an aggregate of the selected write commands, to within boundaries of one of the storage regions of the solid-state storage medium.

12. The system of claim 11 , wherein the criterion comprises at least one criterion selected from a group of criteria consisting of:
application lifetime, application version, application thumbprint, pending input/output (I/O) requests, temporal patterns in I/O operation, type of file being accessed, and type of a file access being performed.

13. The system of claim 11 , wherein each of the storage regions comprises a smallest unit of the storage medium that may be individually acted upon during a single write cycle.

14. The system of claim 11 , wherein the criterion comprises at least one criterion selected from a group of criteria consisting of: application lifetime, application version, application thumbprint, temporal patterns in I/O operation, type of file being accessed, and type of a file access being performed.

15. A non-transitory computer-readable medium comprising instructions to direct a processor to:
receive write commands for writing to a solid-state storage medium having storage regions;
filter out selected write commands according to a criterion;
cache the selected write commands;
facilitate aggregated writing of data, pursuant to an aggregate of the selected write commands, to within boundaries of one of the storage regions of the solid-state storage medium; and
transmit the cached subset of write commands to the solid-state storage medium for the aggregated writing wherein said one of the storage regions has a data storage capacity and wherein the cached selected write commands are transmitted to the solid-state storage medium for the aggregated writing in response to a total amount of data of the cached selected write commands being at least 60% of the data storage capacity, wherein the criterion is applied to each individual write command of the received write commands and wherein the criterion comprises an amount of data to be written pursuant to each individual write command.

16. The non-transitory computer-readable medium of claim 15 further comprising instructions to direct the processor to transmitting the cached selected write commands to the solid-state storage medium for the aggregated writing.

17. The non-transitory computer-readable medium of claim 15 , wherein the criterion comprises at least one criterion selected from a group of predefined criteria consisting of: application lifetime, application version, application thumbprint, pending input/output (I/O) requests, temporal patterns in I/O operation, type of file being accessed, and type of a file access being performed.

Assignees

• Hewlett Packard Development Co

Inventors

• Graham Christoph J
• Flynn Thomas J
• Herrera Virginia Q

Classifications

• G06F12/0246

  in block erasable memory, e.g. flash memory · CPC title

• G06F13/00

  Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units (interface circuits for specific input/output devices G06F3/00 {; multiprogram control therefor  G06F9/46}; multiprocessor systems  G06F15/16 ) · CPC title

• G06F3/0616

  in relation to life time, e.g. increasing Mean Time Between Failures [MTBF] · CPC title

• G06F9/30

  Arrangements for executing machine instructions, e.g. instruction decode (for executing microinstructions G06F9/22) · CPC title

• G06F2212/214

  Solid state disk · CPC title