US 2020/0401327 A1Published application

Dynamic Allocation Of Storage From A Shared Storage Pool Across Different Redundancy Levels

AssigneeIntelliflash By Ddn, Inc.

InventorsNabakishore Munda, Shailendra Tripathi

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Abstract

Systems and methods are described for dynamically allocating digital data storage from a shared storage pool across multiple different redundancy configurations. Respective slabs of storage from a first set and from a second set of storage devices of a data storage system are allocated to a first virtual device having a first redundancy level and to a second virtual device having a second different redundancy level, where at least one of the slabs corresponding to each respective virtual device is from the same device. In response to write requests corresponding to the virtual devices, such as from a different application corresponding to each respective virtual device, data blocks from each respective slabs can be dynamically allocated to fulfill the requests. As such, redundancy/fault tolerant policies can effectively be set as a configurable property relative to each application that utilizes the data storage system.

Claims20

Dependent claims

A method of allocating digital storage space from a shared storage pool comprising physical storage from a plurality of data storage devices of a data storage system, the method comprising:

allocating a first one or more slabs of storage from a first set of the plurality of data storage devices to a first virtual device having a first redundancy level;
and
allocating a second one or more slabs of storage from a second set of the plurality of data storage devices to a second virtual device having a second redundancy level, wherein:
at least one of the first slabs and at least one of the second slabs is from a same data storage device, and
the second redundancy level is different from the first redundancy level;
in response to freeing of a set of blocks from the first one or more slabs corresponding to the first virtual device, returning to the storage pool the set of blocks;
allocating a third one or more slabs of storage from a third set of the plurality of data storage devices to a third virtual device having a third redundancy level different from the first redundancy level, wherein the third one or more slabs includes the set of blocks;
and
in response to a write request corresponding to the third virtual device, allocating the set of blocks from the third one or more slabs to fulfill the write request corresponding to the third virtual device.

6 more elements

A data storage system comprising:

a plurality of data storage devices;
and
a system controller circuitry comprising memory and one or more processors and embodying one or more sequences of instructions which, when executed by the one or more processors, cause performance of:
allocating a first one or more slabs of storage from a first set of the plurality of data storage devices to a first virtual device having a first redundancy level;
and
allocating a second one or more slabs of storage from a second set of the plurality of data storage devices to a second virtual device having a second redundancy level, wherein:
at least one of the first slabs and at least one of the second slabs is from a same data storage device, and
the second redundancy level is different from the first redundancy level;
in response to freeing of a set of blocks from the first one or more slabs corresponding to the first virtual device, returning to the storage pool the set of blocks;
allocating a third one or more slabs of storage from a third set of the plurality of data storage devices to a third virtual device having a third redundancy level different from the first redundancy level, wherein the third one or more slabs includes the set of blocks;
and
in response to a write request corresponding to the third virtual device, allocating the set of blocks from the third one or more slabs to fulfill the write request corresponding to the third virtual device.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/445,152Filed 18 Jun 2019
Published: 24 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G06F 3/0631
Configuration or reconfiguration of storage systems: by allocating resources to storage systems
G06F 3/0605
Improving or facilitating administration, e.g. storage management: by facilitating the interaction with a user or administrator
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 3/0659
Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices: command handling…

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