What is “Tier 0” in Storage Environments?

Tier "0" is not new in storage market but for implementation purposes it has been difficult to accommodate because it requires best performance and lowest latency. Enterprise Flash disks (Solid State Disks) capable to meet this requirement. It is possible to get more performance for company most critical applications. The performance can be gained through using Flash drives supported in VMAX and DMX-4 systems.  Read More →

Flash Drives in DMX

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EMC announce Flash Drive support in CX-4 (A new generation CLARiiON) and DMX-4. EMC started supporting TIER 0 with Flash Drive. Flash drives provide maximum performance for latency sensitive applications. Flash drives, also referred to as solid state drives (SSD), contain no moving parts and appear as standard Fibre Channel drives to existing Symmetrix management tools, allowing administrators to manage tier 0 without special processes or custom tools. Tier 0 Flash storage is ideally suited for applications with high transaction rates and those requiring the fastest possible retrieval and storage of data, such as currency exchange and electronic trading systems, or real time data feed processing.

A Symmetrix DMX-4 with Flash drives can deliver single-millisecond application response times and up to 30 times more IOPS than traditional 15,000 rpm Fibre Channel disk drives. Additionally, because there are no mechanical components, Flash drives require up to 98 percent less energy per IOPS than traditional disk drives. Database acceleration is one example for Flash drive performance impact. Flash drive storage can be used to accelerate online transaction processing (OLTP), accelerating performance with large indices and frequently accessed database tables. Examples of OLTP applications include Oracle and DB2 databases, and SAP R/3. Flash drives can also improve performance in batch processing and shorten batch processing windows.

Flash drive performance will help any application that needs the lowest latency possible. Examples include

· Algorithmic trading

· Currency exchange and arbitrage

· Trade optimization

· Realtime data/feed processing

· Contextual web advertising

· Other realtime transaction systems

· Data modeling

Flash drives are most beneficial with random read misses (RRM). If the RRM percentage is low, Flash drives may show less benefit since writes and sequential reads/writes already leverage Symmetrix cache to achieve the lowest possible response times. The local EMC SPEED Guru can do a performance analysis of the current workload to determine how the customer may benefit from Flash drives. Write response times of long distance SRDF/S replication could be high relative to response times from Flash drives. Flash drives cannot help with reducing response time due to long distance replication. However, read misses still enjoy low response times.

Flash drives can be used as clone source and target volumes. Flash drives can be used as SNAP source volumes. Virtual LUN Migration supports migrating volumes to and from Flash drives. Flash drives can be used with SRDF/s and SRDF/A. Metavolumes can be configured on Flash drives as long as all of the logicals in the metagroup are on Flash drives.

Limitations and Restrictions of Flash drives:

Due to the new nature of the technology, not all Symmetrix functions are currently supported on Flash drives. The following is a list of the current limitations and restrictions of Flash drives.

• Delta Set Extension and SNAP pools cannot be configured on Flash drives.
• RAID 1 and RAID 6 protection, as well as unprotected volumes, are currently not supported with Flash drives.
• TimeFinder/Mirror is currently not supported with Flash drives.
• iSeries volumes currently cannot be configured on Flash drives.
• Open Replicator of volumes configured on Flash drives is not currently supported.
• Secure Erase of Flash drives is not currently supported.
• Compatible Flash for z/OS and Compatible Native Flash for z/OS are not currently supported.
• TPF is not currently supported.

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EMC Invista

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Everybody talks about Virtualization like Server Based virtualization, Host Based Virtualization and now EMC launch EMC Invista ( Probably First Network Virtualization product) Product in May, 2005. EMC Invista leverages intelligent SAN switches to deploy network-based, block-level storage virtualization. Invista takes advantage of specialized processing power in intelligent switches to perform I/O redirection at wire speed.
Its revolutionary split-path architecture places the virtualization intelligence in the network, where best applied, and with no impact on server or application performance. As a result, EMC Invista delivers higher application availability, reduced administrative overhead, more effective and efficient use of storage resources, and reduced costs when compared to other solutions using alternative approaches.
EMC Invista provides data migrations, pooling, tiered storage, non-disruptive technology refreshes across heterogeneous arrays, and operational efficiency via centralized and standardized volume management .It lets organizations reduce downtime while increasing data availability, and utilize storage assets efficiently, effectively, and economically.

¨ Enables non-disruptive data migration
¨ Provides dynamic volume mobility, network-based volume management, and heterogeneous point-in-time copies
¨ Employs a split-path architecture that leverages intelligent SAN switches for high performance and data integrity
¨ Integrates with EMC ControlCenter and Replication Manager for enterprise management, and is VMware ESX certified
¨ Supports heterogeneous storage environments
¨ Runs on intelligent switches using Brocade and Cisco technology, leveraging standard APIs.

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About Me

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Sr. Solutions Architect; Expertise: - Cloud Design & Architect - Data Center Consolidation - DC/Storage Virtualization - Technology Refresh - Data Migration - SAN Refresh - Data Center Architecture More info:- diwakar@emcstorageinfo.com
Blog Disclaimer: “The opinions expressed here are my personal opinions. Content published here is not read or approved in advance by EMC and does not necessarily reflect the views and opinions of EMC.”
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