Next step in SSD evolution: NVMe zoned namespaces explained
From OSnews@21:1/5 to All on Sat Aug 8 00:02:13 2020
In June we saw an update to the NVMe standard. The update defines a software interface to assist in actually reading and writing to the drives in a way to which SSDs and NAND flash actually works.
Instead of emulating the traditional block device model that SSDs inherited from hard drives and earlier storage technologies, the new NVMe Zoned Namespaces optional feature allows SSDs to implement a different storage abstraction over flash memory. This
is quite similar to the extensions SAS and SATA have added to accommodate Shingled Magnetic Recording (SMR) hard drives, with a few extras for SSDs. ‘Zoned' SSDs with this new feature can offer better performance than regular SSDs, with less
overprovisioning and less DRAM. The downside is that applications and operating systems have to be updated to support zoned storage, but that work is well underway.