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Efficient reuse of segments in nonoverwrite storage systems
US9213634B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9213634-B2 |
| Application number | US-201314088265-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 22, 2013 |
| Priority date | Nov 22, 2013 |
| Publication date | Dec 15, 2015 |
| Grant date | Dec 15, 2015 |
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Abstract
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A non-overwrite storage system, such as a log-structured file system, that includes a non-volatile storage having multiple storage segments, a volatile storage having an unsafe free segments list (UFSL), and a controller for managing storage resources of the non-volatile storage. The controller can be configured to copy page data from used segment(s) of the non-volatile storage, write the copied page data to free segment(s) of the non-volatile storage, index the UFSL with indications of the used segment(s), and thereafter prevent reuse of the used segment(s) while the indications of the used segment(s) remain indexed in the UFSL. In some implementations, the non-overwrite storage system may be associated with flash storage system, and a flash controller can be configured perform a flush track cache operation to clear the indications of the used segment(s) from the UFSL, to enable reuse of segment(s) that were previously indexed to the UFSL.
First claim
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What is claimed is: 1. A method of managing storage resources for a log-structured file system (LFS), the method comprising: copying write block data from a plurality of used segments of the LFS; writing the copied write block data to one or more free segments of the LFS; indexing an unsafe free segments list (UFSL) with indications of the plurality of used segments after copying the write block data; and preventing reuse of the plurality of used segments while the indicatio…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G06F12/0246Primary
Physics · mapped topic
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- What does patent US9213634B2 cover?
- A non-overwrite storage system, such as a log-structured file system, that includes a non-volatile storage having multiple storage segments, a volatile storage having an unsafe free segments list (UFSL), and a controller for managing storage resources of the non-volatile storage. The controller can be configured to copy page data from used segment(s) of the non-volatile storage, write the copie…
- Who is the assignee on this patent?
- Apple Inc
- What technology area does this patent fall under?
- Primary CPC classification G06F12/0246. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 15 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).