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Andrew Reichman Senior Analyst Forrester Research November 20 th , 2008 Society for Information Mgmt SSD: Uses for Memory ...
Agenda <ul><li>The Use Case for SSD in Storage </li></ul><ul><li>Nuts And Bolts Of SSD Technology </li></ul><ul><li>Archit...
The Use Case For SSD in Storage
SSD Offers Reduced Data Access Time <ul><li>SSD storage has much lower latency than traditional hard drives </li></ul><ul>...
Nuts and Bolts of SSD Technology
SSD can be DRAM or Flash Based <ul><li>DRAM (the same media used for server and array cache) has the highest performance p...
SSD can be DRAM or Flash Based <ul><li>Flash has lower performance than DRAM, but is less costly and is non-volatile </li>...
But, any SSD Is Expensive <ul><li>There are some environments where cost is no object </li></ul><ul><li>For the majority t...
Memory as Persistent Storage vs. Cache <ul><li>Vendors disagree on whether SSD should be deployed as persistent storage or...
Architectural Options for SSD and Cache
SSD/Cache can be Deployed in Many Ways <ul><li>Dedicated SSD Array </li></ul><ul><li>HDD/SSD Hybrid Array </li></ul><ul><l...
Dedicated SSD Arrays Have Been Around
Hybrid HDD/SSD Minimize Disruption
More Cache in the Array can sit in for SSD
Cache Appliances Create Global Pools of Memory
Storage Virtualization Appliances Can Deploy Added Cache
Vendor Offerings on the Market
Nearly Every Storage Vendor is Talking SSD Current Offerings on the Market: Dedicated SSD Array RAM SAN Texas Memory Syste...
Barriers to Adoption
Barriers to Adoption <ul><li>Cost- SSD still commands a premium over HDD </li></ul><ul><li>Identifying data for SSD is har...
Recommendations
Recommendations <ul><li>Don’t get caught in the hype </li></ul><ul><li>SSD is costly, so be judicious </li></ul><ul><li>Co...
Thank you Andrew Reichman 617.613.6172 [email_address] www.forrester.com
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  • Bumper slide: Use this slide to introduce new sections of your presentation.
  • Forrester Research was founded in 1983 by George F. Colony. We have headquarters in Cambridge, MA, with additional research offices in Amsterdam, Frankfurt, London, Norwalk, CT., Paris, Santa Clara, CA., and San Francisco. We are publicly traded on Nasdaq and our trading symbol is FORR. Forrester celebrated its 20th year in business in 2003.
  • Bumper slide: Use this slide to introduce new sections of your presentation.
  • Forrester Research was founded in 1983 by George F. Colony. We have headquarters in Cambridge, MA, with additional research offices in Amsterdam, Frankfurt, London, Norwalk, CT., Paris, Santa Clara, CA., and San Francisco. We are publicly traded on Nasdaq and our trading symbol is FORR. Forrester celebrated its 20th year in business in 2003.
  • Forrester Research was founded in 1983 by George F. Colony. We have headquarters in Cambridge, MA, with additional research offices in Amsterdam, Frankfurt, London, Norwalk, CT., Paris, Santa Clara, CA., and San Francisco. We are publicly traded on Nasdaq and our trading symbol is FORR. Forrester celebrated its 20th year in business in 2003.
  • Bumper slide: Use this slide to introduce new sections of your presentation.
  • Bumper slide: Use this slide to introduce new sections of your presentation.
  • Bumper slide: Use this slide to introduce new sections of your presentation.
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  • Transcript of "Click here for presentation"

    1. 2. Andrew Reichman Senior Analyst Forrester Research November 20 th , 2008 Society for Information Mgmt SSD: Uses for Memory in Storage for Application Acceleration
    2. 3. Agenda <ul><li>The Use Case for SSD in Storage </li></ul><ul><li>Nuts And Bolts Of SSD Technology </li></ul><ul><li>Architectural Options for SSD and Cache </li></ul><ul><li>Current Vendor Offerings </li></ul><ul><li>SSD Barriers To Adoption </li></ul>
    3. 4. The Use Case For SSD in Storage
    4. 5. SSD Offers Reduced Data Access Time <ul><li>SSD storage has much lower latency than traditional hard drives </li></ul><ul><li>Applications that are extremely sensitive to latency in data access are likely to benefit from SSD </li></ul><ul><li>Typical applications include Online Transaction Processing (OLTP) databases </li></ul><ul><li>Data being crunched heavily for analysis that is time sensitive is also a good candidate </li></ul>
    5. 6. Nuts and Bolts of SSD Technology
    6. 7. SSD can be DRAM or Flash Based <ul><li>DRAM (the same media used for server and array cache) has the highest performance profile </li></ul><ul><li>But, DRAM is the most costly SSD option </li></ul><ul><li>Also, DRAM is volatile, meaning it must be continuously powered to retain data </li></ul><ul><li>Volatility of DRAM requires battery backup </li></ul>
    7. 8. SSD can be DRAM or Flash Based <ul><li>Flash has lower performance than DRAM, but is less costly and is non-volatile </li></ul><ul><li>The cost reduction curve for Flash is steeper </li></ul><ul><li>Flash has resiliency concerns- limited read-write-erase cycle </li></ul><ul><li>Flash can be SLC or MLC </li></ul><ul><li>Performance can be tuned for read or write, but not both- leads to interest split path architecture </li></ul><ul><li>Most current interest in SSD revolves around SLC flash </li></ul>
    8. 9. But, any SSD Is Expensive <ul><li>There are some environments where cost is no object </li></ul><ul><li>For the majority though, the cost of SSD would have to be offset by something else </li></ul><ul><li>SSD can contribute to increased use of SATA </li></ul><ul><li>SSD can reduce the amount of cache in arrays </li></ul><ul><li>For environments that are short stroking for performance, SSD can be cost effective </li></ul><ul><li>SSD often offers power savings over HDD </li></ul>
    9. 10. Memory as Persistent Storage vs. Cache <ul><li>Vendors disagree on whether SSD should be deployed as persistent storage or as cache </li></ul><ul><li>Persistent storage allows admins to use mature processes for management, often using HDD form factor SSD drives </li></ul><ul><li>But, admins must manually determine what to put on persistent SSD, and it may be wasted </li></ul><ul><li>Cache algorithms allow data to move in and out of memory depending on usage </li></ul><ul><li>Cache could allow better utilization of resources </li></ul>
    10. 11. Architectural Options for SSD and Cache
    11. 12. SSD/Cache can be Deployed in Many Ways <ul><li>Dedicated SSD Array </li></ul><ul><li>HDD/SSD Hybrid Array </li></ul><ul><li>Increased Cache in Array </li></ul><ul><li>Cache Appliance </li></ul><ul><li>Virtualization Appliance </li></ul>
    12. 13. Dedicated SSD Arrays Have Been Around
    13. 14. Hybrid HDD/SSD Minimize Disruption
    14. 15. More Cache in the Array can sit in for SSD
    15. 16. Cache Appliances Create Global Pools of Memory
    16. 17. Storage Virtualization Appliances Can Deploy Added Cache
    17. 18. Vendor Offerings on the Market
    18. 19. Nearly Every Storage Vendor is Talking SSD Current Offerings on the Market: Dedicated SSD Array RAM SAN Texas Memory Systems Dedicated SSD Array   SD/StorageSpire Solid Data Global Cache Appliance SAA NetApp Cache Module for Arrays PAM NetApp Global Cache Appliance CacheFX Gear6 HDD form factor Persistent Storage Symmetrix & Clariion EMC High Cache Virtualization Appliance SAN Symphony DataCore HDD form factor Persistent Storage with automated tiering Storage Center Compellent Architecture Product Vendor
    19. 20. Barriers to Adoption
    20. 21. Barriers to Adoption <ul><li>Cost- SSD still commands a premium over HDD </li></ul><ul><li>Identifying data for SSD is hard; performance analytics tools are weak and under-adopted </li></ul><ul><li>Reliability concerns remain for Flash in enterprise </li></ul><ul><li>Concerns about incompatibility of HDD error codes </li></ul><ul><li>Lack of architecture consensus slows acceptance </li></ul>
    21. 22. Recommendations
    22. 23. Recommendations <ul><li>Don’t get caught in the hype </li></ul><ul><li>SSD is costly, so be judicious </li></ul><ul><li>Consider how you will identify which data to place on SSD in a persistent architecture </li></ul><ul><li>Performance analytics is critical for SSD success </li></ul><ul><li>Start with applications- if latency is the bottleneck, then SSD might be the answer </li></ul>
    23. 24. Thank you Andrew Reichman 617.613.6172 [email_address] www.forrester.com
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