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 .[ 1] 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 .
Implementations
Some commercial products for building hybrid arrays include:
Adaptec demonstrated the MaxIQ series in 2009.[ 2]
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.[ 3] [ 4]
Fusion-io acquired ioTurbine in 2011,[ 5] and the product line it acquired by buying NexGen in 2013.[ 6]
Hitachi Accelerated Flash Storage (HAFS) used together with the Hitachi Dynamic Tiering software[ 7]
IBM Flash Cache Storage Accelerator (FCSA) server software[ 8]
Intel's Smart Response Technology for desktop
Intel's Cache Acceleration Software for servers and workstations
LSI CacheCade software for their controllers[ 9]
Marvell 's HyperDuo controllers[ 10]
Microsoft's Automated Tiering (since Windows 2012 R2)
NetApp 's Flash Cache, Flash Pool, Flash Accel[ 11]
Oracle Corporation markets products such as Exadata Smart Cache Flash, and the FS1 flash storage system.[ 12]
Microsoft ReadyBoost allows personal computers to use USB flash drives (or any solid-state media ) as cache.
Nvelo DataPlex SSD caching software was announced in 2011,[ 13] and was acquired by Samsung in 2012.[ 14]
SanDisk FlashSoft for Windows, Linux, and vSphere [ 5]
Products are offered by vendors like AMI StorTrends ,[ 15] Tegile Systems , Reduxio , and Tintri .[ 16]
ZFS using hybrid storage pools, are used for example in some Oracle Corporation products.[ 17]
See also
References
^ 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 September 6, 2024 .
^ Larry Dignan (February 5, 2012). "EMC unveils VFCache, targets Fusion-io" . Between the Lines . ZDNet. Archived from the original on February 6, 2012. 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 .
^ a b "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 . Archived from the original on 2015-04-02. 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 .