02-HUAWEI RAID 2.0+ Technical Pre-Sales Specialist Training V1.0 [PDF]

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Huawei RAID 2.0+ Technical Training

Date: March. 5, 2015

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Teacher name Background

Project Experience

Teacher name

Specialist Skills

position [email protected]

+0086 1888888888

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Page 1

Content 1

Principle and Concept of RAID 2.0+

2

Highlights of RAID 2.0+

3

Comparison of RAID Virtualization Technologies

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RAID Technology Evolution

Hot spare

Hot spare

Traditional RAID

LUN virtualization EMC: VNX HDS: VSP IBM: DS8000

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Block virtualization Huawei: RAID 2.0+ HP 3PAR: Fast RAID IBM XIV: Super stripe

LUN Virtualization LUN

Cell

RAID group Disk Hot Spare disk

Hot Spare disk

Lower system reliability: LUN reliability is reduced to 1/N of a single RAID group. HUAWEI TECHNOLOGIES CO., LTD.

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Block Virtualization LUN

Cell

RAID

Disk

Hot spare space

Higher system reliability: Reconstruction of a single disk is faster & the reconstruction impact is mitigated. HUAWEI TECHNOLOGIES CO., LTD.

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Logical Objects Involved in RAID 2.0+ Disk Domain Storage Pool Tier

Chunk

CKG

Extent

Grain

Volume

LUNs are visible to hosts.

Tiered

Not tiered

Not tiered

Storage Pool

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File systems are visible to hosts.

Content 1

Principle and Concept of RAID 2.0+

2

Highlights of RAID 2.0+

3

Comparison of RAID Virtualization Technologies

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Automatic Load Balancing, decrease the Overall Failure Rate

 Duty Cycle: indicates the percentage of disk working time to total disk power-on time  AFR: indicates the annual failure rate

RAID 2.0+ prevents unbalanced loads to decrease the overall failure rate of a storage system.

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A More Reliable System with 20 Times Data Reconstruction Speed Reconstruction principle of traditional RAID

Reconstruction principle of RAID 2.0+

RAID 2.0+ shortens the time from 10 hours to 0.5 hour.

Traditional RAID reconstruction speed is 30 MB/s, so reconstruct 1 TB data need 10 hours. Real test by Huawei, to reconstruct 1 TB data, RAID 2.0+ shortens the time from 10 hours to 30 minutes.

Few-to-One Rebuild

hotspots & long rebuild exposure HUAWEI TECHNOLOGIES CO., LTD.

Many-to-Many Rebuild

parallel rebuilds in less time Huawei Confidential

Simplifying Storage Planning and Management

0

1

2

3

4

5

6

7

0

R1 R1 R5 R6 R6 R1 R5 R5 RAID5

RAID1

RAID6

LUN 5

LUN 4 LUN 3

RAID1

3

4

5

6

7

R1 R1 R5 R6 R6 R1 R5 R5

RAID5 LUN 2

Spare

LUN 0 LUN 1

2

Spare

LUN 6 LUN 7

1

Huawei RAID 2.0+

Traditional RAID

Traditional RAID

Huawei RAID 2.0+

The administrator must complete the planning of the disks, the RAID groups, and the LUNs before the configuration process begins.

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The administrator does not waste time on the detailed planning of the storage resource.

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Content 1

Principle and Concept of RAID 2.0+

2

Highlights of RAID 2.0+

3

Comparison of RAID Virtualization Technologies

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HP 3PAR StoreServ 10000 FPVV s

CPG TPVV s

Physical Disks

Chunklet Physical disk space divided into 256 MB or 1 GB units

Logical Disks The chunklets form Logical Disks(LD).

HP 3PAR Fast RAID

Host

The Virtual Volume(VV) request storage space from several LD.

Huawei RAID 2.0+

The chunklet size is 256 MB or 1 GB, and the virtual volume size is 32 MB.

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Virtual Volumes

The size of chunk is 64 MB, and the size of extent is 512 KB to 64 MB. It fits different applications well.

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EMC VMAX Series Meta volume

Volume

Disk group Hot spare

Hyper Volume

EMC VMAX

Huawei RAID 2.0+

The Hyper Volume size is from several GB to over 100 GB

The size of chunk is 64 MB, more efficient

The hot spare space is offered by a hot spare disk, so it will become a bottleneck when the system start to reconstruct.

The hot spare space is distributed on all the disks in a disk domain, so there is no bottleneck in storage system. No bottleneck

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IBM XIV Logical volume

Data Module

Data Module

Stripe 1MB

IBM XIV

Huawei RAID 2.0+

Each logical volume is divided into multiple stripes of 1MB

The size of chunk is 64 MB

Each Stripe have a duplicate copy on another disk Configurable RAID policy and hot spare policy Low capacity efficiency, less than 50%

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Summary Product RAID Tech

RAID level

Hot spare

Chunk size

Extent size

reconstruction

Huawei V3 RAID2.0+

Block

space

64M

512K-64MB

Fast, no bottleneck, rebuild less data

HP 3PAR FAST RAID

Block

space

256M or 1GB

64MB

Fast, no bottleneck, rebuild less data

IBM XIV Super stripe

Block

space

1M

N/A Space utilization < 50%,Limited capacity,

Fast, no bottleneck, rebuild less data

EMC VMAX

Block

Disk

GB ~100GB

7.5 MB

Slow, bottleneck, rebuild more data

EMC VNX2

Disk

Disk

N/A

256 MB

Slow, bottleneck, rebuild more data

HDS VSP

Disk

Disk

N/A

42 MB

Slow, bottleneck, rebuild more data

IBM DS8000

Disk

Disk

N/A

1GB

Slow, bottleneck, rebuild more data

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