CA2644930A1 - Topology independent storage arrays and methods - Google Patents

Topology independent storage arrays and methods Download PDF

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Publication number
CA2644930A1
CA2644930A1 CA002644930A CA2644930A CA2644930A1 CA 2644930 A1 CA2644930 A1 CA 2644930A1 CA 002644930 A CA002644930 A CA 002644930A CA 2644930 A CA2644930 A CA 2644930A CA 2644930 A1 CA2644930 A1 CA 2644930A1
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Prior art keywords
partition
array
storage
storage device
topology
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CA002644930A
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French (fr)
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CA2644930C (en
Inventor
Thomas Earl Ludwig
Charles William Frank
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Rateze Remote Mgmt LLC
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Rateze Remote Mgmt. L.L.C.
Thomas Earl Ludwig
Charles William Frank
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Publication of CA2644930A1 publication Critical patent/CA2644930A1/en
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0604—Improving or facilitating administration, e.g. storage management
    • G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0629—Configuration or reconfiguration of storage systems
    • G06F3/0631—Configuration or reconfiguration of storage systems by allocating resources to storage systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
    • G06F3/0647—Migration mechanisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/067—Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0683—Plurality of storage devices
    • G06F3/0689—Disk arrays, e.g. RAID, JBOD
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
    • G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
    • G06F11/2087—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring with a common controller

Abstract

A topology independent storage array. In a preferred embodiment the topology of the array is reconfigurable due to information control packets passed among storage nodes comprising the array. The topology of the array, as determine by the relationship between data sets stored within the array's storage nodes and storage maps of the storage node, can be reconfigured without requiring a complete duplication of the entire array. In especially preferred embodiments, the topology of the storage array follows a Z-10 or a Z-110 configuration where storage devices store one or more mirrored parts of a data set per storage device.

Claims (25)

1. A storage array comprising (a) a first storage device having a fust partition where data can be stored on a first storage media and where the first partition is independently accessible by a client over a network;

(b) a second storage device having a second partition where data ean be stored on a second storage media and where the second partition is independently accessible by the client over the network;

(c) a data set spread between the first partition and the second partition;
and (d) a storage map is at least partially stored in a memory of a third device operating as a device other than a controller for the first or second storage device, and where the storage map defines the topology of the array with respect to the data set and the first and second partition.
2. The array of claim 1 wherein the topology comprises a RAID structure.
3. The array of claim 2 wherein the RAID structure includes at least one of the following: RAID-0, RAID-1, RAID-5, RAID-6, RAID-10, RAID-50, and RAID-53.
4. The array of claim 1 wherein the topology comprises a RAID-10-like structure where the data set is striped across the first partition and the second partition and where a third partition mirrors the first partition and is located on a third storage device other than the first storage device.
5. The array of claim 4 wherein the third storage device is the same storage device as the second storage device.
6. The array of claim 5 wherein the third partition is interleaved with the second partition.
7. The array of claim 4 wherein the third partition is staggered across the array with respect to the first partition.
8. The array of claim 7 the topology comprises a Z-10 configuration.
9. The array of claim 8 the topology comprises a Z-110 configuration.
10. The array of claim 1 wherein the memory comprises a first memory and a second memory where the second memory is located in the third device operating as the client.
11. The array of claim 10 wherein the storage map further comprises a first sub-map stored in the first memory and a second sub-map stored in the second memory.
12. The array of claim 1 wherein the first storage device is physically distinct from the second storage device.
13. The array of claim 12 wherein the first storage device and the second storage device are located in different enclosures.
14. The array of claim 1 wherein the first and second partitions are adapted to respond individually to instructions included in a packet sent over the network.
15. The array of claim 14 wherein the first and second partitions each have an address on the network.
16. The array of claim 15 wherein the first and second partitions each have a name the resolves to their respective addresses.
17. A method of configuring a topology of a storage array, the method comprising:

(a) providing a first and second storage device having a first and second partition, respectively, where data is stored on storage media, and where the first and second partitions are independently accessible by a client over a network;

(b) establishing a storage map stored in a memory of a third device operating as a device other than a controller for the first or second storage device where the storage map defines the topology of the array with respect to the data set and the first partition and the second partition.

(c) spreading a data set among the first partition and the second partition;
and (d) taking an action with respect to a third partition that includes at least one of:
adding the third partition to the storage array and removing the third partition from the array where the action also includes updating the storage map.
18. The method of claim 17, further comprising copying data from the first partition to the third partition in a manner that maintains the topology.
19. The method of claim 18, further comprising removing the first partition from the array after copying data completes.
20. The method of claim 17, further comprising exchanging a packet over the network with the first partition where the packet comprises instructions that affect a state associated with the first partition.
21. The method of claim 20, further securing the packets with respect to at least one of confidentiality, integrity, and authentication.
22. The method of claim 17, wherein the act of establishing a storage map includes forming the topology into a RAID-10-like structure where the data set is striped across the first and second partitions, and where the third partition mirrors the first partition and is located on a third storage device other than the first storage device.
23. The method of claim 22, further comprising forming the topology into a Z-configuration.
24. The method of claim 23, further comprising forming the topology into a Z-configuration.
25. The method of claim 22, further comprising forming a staggered mirror across the first and second storage devices.
CA2644930A 2005-03-14 2005-08-09 Topology independent storage arrays and methods Active CA2644930C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US66206905P 2005-03-14 2005-03-14
US60/662,069 2005-03-14
US11/173,765 US7702850B2 (en) 2005-03-14 2005-07-01 Topology independent storage arrays and methods
US11/173,765 2005-07-01
PCT/US2005/028335 WO2006098753A1 (en) 2005-03-14 2005-08-09 Topology independent storage arrays and methods

Publications (2)

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CA2644930A1 true CA2644930A1 (en) 2006-09-21
CA2644930C CA2644930C (en) 2012-01-24

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CA (1) CA2644930C (en)
WO (1) WO2006098753A1 (en)

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