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3 Fixes: Hybrid SSD Array Performance Gap
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rcommins
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rcommins,
User Rank: Apprentice
12/13/2012 | 4:27:48 PM
re: 3 Fixes: Hybrid SSD Array Performance Gap
Hi George - you do indeed bring up good points. Server and desktop virtualization set the incumbent storage vendors on their heels. Just as those platforms changed the rules on the server side, new rules must be followed on the storage side. The points you make in this post are right out of Tegile's playbook. We have massive amounts of DRAM for read cache and IO acceleration, SSD for a write cache and extended IO acceleration, as well as expandable capacity that has a blend of SSH and HDD that maintains performance integrity at scale. All three of these layers benefit for high performance in-line de-duplication. By that, I mean that if a server platform gets a 5:1 data reduction ratio, the effective amount of DRAM, SSD and HDD resources increase 5X to all applications. This boosts cache hit ratios and performance increases for all applications on that platform. It will be interesting to watch the incumbents respond to the new rules in our market. Thank you for the thought leadership, sir!

Rob
StorageOlogist
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StorageOlogist,
User Rank: Apprentice
12/13/2012 | 3:12:39 PM
re: 3 Fixes: Hybrid SSD Array Performance Gap
Good points George. At Starboard Storage we solve these issues with innovation in the seperation of Read and Write cache, enabling simple plug and play cache expansion and with our innovative Dynamic Storage Poll for the HDD layer. Also not all caching algoritms are created equal. We do not simply look and the most frequent and most recent data access to populate the cache. We have intelligence in understanding the "quality" of the data and use this to treat data differently in how it is promoted to and evacuated from the cache minimizing any potential of a cache miss. Add to this the seperate write cache, simple expandability, SAN and NAS and a dynamic storage pool and you have a system that delivers the best hybrid storage capabilities. You can read more about how our cache algoritms work in my blog "Hybrid Storage SSd caching explained" http://blog.starboardstorage.c...


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