A hybrid array is a form of hierarchical storage management that combines hard disk drives (HDDs) with solid-state drives (SSDs) for I/O speed improvements.
Hybrid storage arrays aim to mitigate the ever increasing price-performance gap between HDDs and DRAM by adding a non-volatile flash level to the memory hierarchy. Hybrid arrays thus aim to lower the cost per I/O, compared to using only SSDs for storage. Hybrid architectures can be as simple as involving a single SSD cache for desktop or laptop computers, or can be more complex as configurations for data centers and cloud computing.
Some commercial products for building hybrid arrays include:
- Adaptec demonstrated the MaxIQ series in 2009.
- Apple’s Fusion Drive
- Linux software includes bcache, dm-cache, and Flashcache (and its fork EnhanceIO).
- Condusive’s ExpressCache is marketed for laptops.
- EMC Corporation VFcache was announced in 2012.
- Fusion-io acquired ioTurbine in 2011,and the product line it acquired by buying NexGen in 2013.
- Hitachi Accelerated Flash Storage (HAFS) used together with the Hitachi Dynamic Tiering software
- IBM Flash Cache Storage Accelerator (FCSA) server software
- Intel’s Smart Response Technology for desktop
- Intel’s Cache Acceleration Software for servers and workstations
- LSI CacheCade software for their controllers
- Marvell’s HyperDuo controllers
- Microsoft’s Automated Tiering (since Windows 2012 R2)
- NetApp’s Flash Cache, Flash Pool, Flash Accel
- Oracle Corporation markets products such as Exadata Smart Cache Flash, and the FS1 flash storage system.
- Microsoft ReadyBoost allows personal computers to USB flash drives as cache.
- Nvelo DataPlex SSD caching software was announced in 2011,and was acquired by Samsung in 2012.
- SanDisk FlashSoft for Windows, Linux, and vSphere
- Products are offered by vendors like AMI StorTrends,Tegile Systems, Reduxio, and Tintri.
- ZFS using hybrid storage pools, are used for example in some Oracle Corporation products.
- ^Rino Micheloni; Alessia Marelli; Kam Eshghi (2012). Inside Solid State Drives (SSDs). Springer. p. 62. ISBN 978-94-007-5145-3.
- ^Charlie Demerjian (September 9, 2009). “Adaptec’s MaxIQ caches RAIDs with SSDs”. SemiAccurate. Retrieved October 10, 2016.
- ^Larry Dignan (February 5, 2012). “EMC unveils VFCache, targets Fusion-io”. Between the Lines. ZDNet. Retrieved October 10, 2016.
- ^Chris Mellor (March 5, 2013). “One day later: EMC declares war on all-flash array, server flash card rivals: Rolls out XtremIO array, renamed VFCache”. The Register. Retrieved October 10, 2016.
- ^ Jump up to:ab “Fusion-io spins up ioTurbine, enhances server flash caching”. The Register. Retrieved October 10, 2016.
- ^“Fusion-io buys NexGen”. theregister.co.uk. Retrieved 2015-03-26.
- ^“Big storage turns the tide in the hybrid flash array market”, Computer Weekly, September 2013, retrieved 2015-03-26
- ^The SSD Guy (2013-08-20). “IBM Adds Server-Side Caching”. The SSD Guy. Retrieved 2013-12-23.
- ^“LSI MegaRAID CacheCade Pro 2.0 Review”. storagereview.com. Retrieved 2015-03-26.
- ^“Hands-on with the Marvell HyperDuo hybrid storage controller”. CNET. CBS Interactive. Retrieved 2015-03-26.
- ^“NetApp: Flash as a STORAGE tier? You must be joking”. theregister.co.uk. Retrieved 2015-03-26.
- ^Chris Mellor (September 30, 2014). “Oracle crashes all-flash bash: Behold, our hybrid FS1 arrays: Mutant flash/disk box a pillar of storage: It’s axiomatic”. The Register. Retrieved October 10, 2016.
- ^Les Tokar (December 4, 2011). “NVELO Dataplex SSD Caching Software Review – Seven mSATA SSDs Prove An Amazing Concept”. The SSD Review. Retrieved October 10, 2016.
- ^Kristian Vättö (December 16, 2012). “Samsung Acquires SSD Caching Company NVELO”. AnandTech. Retrieved October 10, 2016.
- ^Ian Barker (2014-01-27). “AMI StorTrends 3500i offers high performance storage for smaller enterprises”. BetaNews. Retrieved 2014-10-17.
- ^“Mutant array upstarts feast on EMC, NetApp’s leavings”. The Register. Retrieved 2015-03-26.
- ^“Oracle’s Flash-Friendly Sun ZFS Storage Is Ready for New SPARCs”. enterprisestorageforum.com. 3 April 2013. Retrieved 2015-03-26.
Ofer Abarbanel is a 25 year securities lending broker and expert who has advised many Israeli regulators, among them the Israel Tax Authority, with respect to stock loans, repurchase agreements and credit derivatives. Founder of TBIL.co STATX Fund.