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  • 1.  NVMe + SSD combination: caching writes or both reads and writes

    Posted Jun 01, 2018 07:18 AM

    Hello,

    I have a question regarding using NVMe as caching device, and SSDs as capacity devices.

    Is this some variant of Hybrid or All-flash implementation, regarding caching? I mean, is NVMe used for caching writes only (as in all-flash) or for caching reads and writes (as in hybrid implementation)?

    Thanks in advance



  • 2.  RE: NVMe + SSD combination: caching writes or both reads and writes

    Posted Jun 01, 2018 10:36 PM

    Hello ezenkiel​

    "Is this some variant of Hybrid or All-flash implementation, regarding caching?"

    It is an All-Flash implementation - however the IO to cache (NVMe here) go directly to this device as opposed to via the controller to the cache-SSD as they would when using a SATA/SAS SSD as cache-tier.

    "I mean, is NVMe used for caching writes only (as in all-flash) or for caching reads and writes (as in hybrid implementation)?"

    100% write-cache as in any All-Flash implementation.

    Bob