Dell Storage SSD og Flash teknologi i SAN Kaj Inge Skjønhaug | Storage Spesialist Kaj_Inge_Skjonhaug@Dell.com

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Hype or the start of something big? Where is the industry in the adoption of solid-state storage?

Analysts agree: We are right at the beginning of a major change in the market that will see massive adoption.

Solid-State-Storage

What is it:

• Solid-state storage is the application of non-volatile memory (NVM) for long term data storage.

• NAND flash is the most commonly used.

Trends:

• Capacities are growing rapidly

• Prices per GB dropping by 38% each year.

Myth #1: SSS is unreliable True: NAND flash chips have a limited life-cycle

Error correction codes (ECC) to manage bit errors have been in use for over 40 years

Advanced techniques like wear-leveling, over-provisioning are combined with ECC to provide solid-state storage systems that easily last 5 years in production.

Myth #2: SSS is expensive

True: More costly than HDDs

Prices are dropping rapidly.

Solutions that utilize SSS well can displace solutions requiring a large amount of traditional spindles to provide performance, at a much lower CAPEX.

Myth #3: SSS requires special skills Some traditional SAN solutions still require complex manual configuration to utilize SSS.

However modern highly virtualized SAN designs automatically incorporate SSS as a tier or cache.

Myth #4: SSS is only for the large data center

The advent of hybrid storage solutions, scale-out architectures and automated tiering has made the benefits of SSS accessible to small and medium-sized organizations.

Many architectures available • In the server PCIe attached

• In the server as an SSD

• In shared storage as a cache

• In shared storage as a tier

• In a hybrid storage system

• In shared storage as a dedicated high speed array

Flash in Dell Solutions Flash at the price of disk. Is it possible today?

Flash Optimized Tiering

Tier 2

Tier 1

Tier 3

RAID 10

RAID 6

Write Intensive Enterprise SAS SSD

Read Optimized Enterprise SAS SSD

RAID 5

RAID 5

RAID 6

RAID 5

7.2K SAS HDDs

Flash-optimized Data Progression leverages the endurance of write-intensive SSDs and the value of read-intensive SSDs.

Flash Optimized Tiering

Flash Optimized Tiering

New economies of flash

New economies of flash

Introducing Dell Fluid Cache for SAN Bringing flash even closer to the application

Issues facing applications: The latency issue

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Dell Fluid Cache software + Dell Compellent = Accelerated application response

Bring data closer to compute

1 Install Fluid Cache software

Private cache network (10/40 GbE)

3 Configure low-latency network

4 Map volumes to cache pool

Cache Client Servers**

Dell Cache Contributor Servers*

*A minimum of 3 validated Dell servers are required to establish the cache pool. **Cache client servers can be a mix of Dell and other servers that run a supported OS and have an available PCIe slot.

Storage network (FC or iSCSI)

Dell SC 8000 storage array

2 Add PCIe SSD Express Flash cache

Cache pool

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