Method and system for storing data in compliance with a compression handling instruction

Patent metadata

Field	Value
Publication number	US-9766812-B2
Application number	US-201113187168-A
Country	US
Kind code	B2
Filing date	Jul 20, 2011
Priority date	Jul 20, 2011
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A method for storing data in a storage system. In one embodiment, implementation of a method for storing data in compliance with a compression handling instruction includes: at a storage controller, receiving an object for storage within a data storage, wherein the object is in an original state; determining whether a compression handling instruction is received in association with the object; and executing the compression handling instruction when storing the object.

First claim

The invention claimed is:

1. A non-transitory computer-readable storage medium having computer-executable instructions for causing a computer system to perform a method for storing comprising:
at a storage controller, receiving from a host application an object for storage within a data storage, wherein said object is a file containing information manipulated by the host application, and wherein said object is in an original state;
determining whether a compression handling instruction is received in association with said object, wherein said compression handling instruction is an instruction provided to the storage controller by the host application requesting storage of said object, wherein said compression handling instruction indicates either that said object should be compressed or should not be compressed based upon whether compressing said object would affect access performance to said object, wherein the host application determines a type of compression handling instruction to be provided to the storage controller in association with said object, and wherein said compression handling instruction overrides a default process of compressing objects before storing within the data storage; and
executing said compression handling instruction when storing said object.

2. The non-transitory computer-readable storage medium of claim 1 , wherein in said method said determining whether a compression handling instruction is received comprises:
determining said compression handling instruction was received, such that said instruction indicates said object is not to be compressed; and
wherein said executing said compression handling instruction comprises storing said object in its original state into said data storage.

3. The non-transitory computer-readable storage medium of claim 2 , further comprising:
disabling a default compression procedure when storing said object into said data storage.

4. The non-transitory computer-readable storage medium of claim 2 , further comprising:
setting a compression handling flag, wherein said flag indicates said object is not to be decompressed from its stored state when accessed; and
storing said flag in association with said object.

5. The non-transitory computer-readable storage medium of claim 4 , further comprising:
receiving a request to access said object from a requesting device at said storage controller;
accessing said object;
determining the presence of said compression handling flag; and
delivering said object to said requesting device without decompressing said object from its stored state when said flag is present.

6. The non-transitory computer-readable storage medium of claim 1 , further comprising:
determining that said compression handling instruction was not received with said object;
from its original state, compressing said object into a compressed state;
storing said object in said compressed state into said data storage;
receiving said compression handling instruction separate from said object, such that said instruction indicates said object is not to be compressed;
accessing said object in its compressed state;
decompressing said object into an uncompressed state;
setting a compression handling flag, wherein said flag indicates said object is not to be decompressed when accessed; and
storing said object in said uncompressed state in said data storage.

7. The non-transitory computer-readable storage medium of claim 1 , further comprising:
wherein said determining whether a compression handling instruction is received comprises determining that said compression handling instruction was received, such that said instruction indicates that said object is to be compressed; and
wherein said executing said compression handling instruction comprises:
compressing said object into a compressed state; and
storing said object in said compressed state into said data storage.

8. The non-transitory computer-readable storage medium of claim 1 , further comprising:
storing said object in a data array.

9. A storage controller comprising:
a processor; and
memory coupled to said processor and having stored therein instructions that, if executed by said computer system, cause said computer system to execute a method for storing comprising:
receiving from a host application at the storage controller an object for storage within a data storage, wherein said object is a file containing information manipulated by the host application, and wherein said object is in an original state;
determining whether a compression handling instruction is received in association with said object, wherein said compression handling instruction is an instruction provided to the storage controller by the host application requesting storage of said object, wherein said compression handling instruction indicates either that said object should be compressed or should not be compressed based upon whether compressing said object would affect access performance to said object, wherein the host application determines a type of compression handling instruction to be provided to the storage controller in association with said object, and wherein said compression handling instruction overrides a default process of compressing objects before storing within the data storage; and
executing said compression handling instruction when storing said object.

10. The storage controller of claim 9 , wherein in said method said determining whether a compression handling instruction is received comprises:
determining said compression handling instruction was received, such that said instruction indicates said object is not to be compressed; and
wherein said executing said compression handling instruction comprises storing said object in its original state into said data storage.

11. The storage controller of claim 10 , wherein said method further comprises:
setting a compression handling flag, wherein said flag indicates said object is not to be decompressed when accessed; and
storing said flag in association with said object.

12. The storage controller of claim 11 , wherein said method further comprises:
receiving a request to access said object from a requesting device;
accessing said object;
determining the presence of said compression handling flag; and
delivering said object to said requesting device without decompressing said object when said flag is present.

13. The storage controller of claim 9 , wherein said method further comprises:
determining that said compression handling instruction was not received with said object;
compressing said object into a compressed state;
storing said object in said compressed state into said data storage;
receiving said compression handling instruction separate from said object, such that said instruction indicates said object is not to be compressed;
accessing said object in its compressed state;
decompressing said object into an uncompressed state;
setting a compression handling flag, wherein said flag indicates said object is not to be decompressed when accessed; and
storing said object in said uncompressed state in said data storage.

14. The storage controller of claim 9 , wherein said method further comprises:
wherein said determining whether a compression handling instruction is received comprises determining that said compression handling instruction was received, such that said instruction indicates said object is to be compressed; and
wherein said executing said compression handling instruction comprises:
compressing said object into a compressed state; and
storing said object in said compressed state into said data st

Assignees

• Pendharkar Niranjan
• Veritas Technologies Llc

Inventors

• Pendharkar Niranjan

Classifications

• G06F16/1744

  using compression, e.g. sparse files · CPC title

• G06F16/1737

  for reducing power consumption or coping with limited storage space, e.g. in mobile devices (saving storage space on storage devices G06F3/0608; power saving in storage systems G06F3/0625) · CPC title

• G06F3/0659

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0608 Primary

  Saving storage space on storage systems · CPC title

• G06F3/0638

  Organizing or formatting or addressing of data · CPC title