Storage system and method for controlling storage system
US-9223655-B2 · Dec 29, 2015 · US
Destaging cache data using a distributed freezer
US9104597B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9104597-B2 |
| Application number | US-201313863804-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 16, 2013 |
| Priority date | Apr 16, 2013 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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Methods, apparatus and computer program products implement embodiments of the present invention that enable digital information devices having respective storage devices and memories to distributedly store, for a logical volume, data and first and second parity values across corresponding regions of the storage devices. Freezers having a one-to-one correspondence with the storage devices are distributedly stored in the memories. Upon detecting, in a cache, updated data for one or more first regions on the storage devices, existing data from the one or more first regions, and additional data for parity calculations are retrieved from one or more corresponding second regions on the storage devices, and first and the second parity values are calculated using the updated data, the existing data and the additional data. The updated data and the calculated first and second parity values are stored to the freezers, and then destaged from the freezers to the storage devices.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method, comprising: arranging multiple digital information devices having respective storage devices and memories to communicate within a network; distributedly storing, for a logical volume, data and first and second parity values across corresponding physical regions of the storage devices; distributedly storing, in the memories, multiple freezer nodes having a one-to-one correspondence with each of the multiple storage devices; detecting, in…
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Physics · mapped topic
Physics · mapped topic
- G06F11/1096Primary
Physics · mapped topic
- G06F11/1076Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US9104597B2 cover?
- Methods, apparatus and computer program products implement embodiments of the present invention that enable digital information devices having respective storage devices and memories to distributedly store, for a logical volume, data and first and second parity values across corresponding regions of the storage devices. Freezers having a one-to-one correspondence with the storage devices are di…
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification G06F11/1096. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 11 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).