mpsys · HackerTrans

7 ปีที่แล้วdiscuss

Moving the abstraction to hardware level gets rid of the multi-layer indirections that maps the key-value pairs to actual physical page. It replaces 3 layers of mappings with 1 layer. That reduces CPU load caused by the multi-layer indirections of software KV stores.

mpsys

7 ปีที่แล้วdiscuss

TRUE!

mpsys

7 ปีที่แล้วdiscuss

KV-SSD replaces the filesystem with Abstract Device Interface(ADI), that sits between the KV API exposed to the applications directly and the KV device driver. According my understanding, although some modern filesystems combines RAID and the file system, these are separate independent abstractions. However, it would be interesting to explore how RAID will work with KV-SSDs. You can take a look at a commercial implementation of Samsung's Mission Peak system to benchmark KV-SSDs (I am not sure whether the following one is an officially approved implementation or not) - https://www.broadberry.com/performance-storage-servers/cyber...

mpsys

7 ปีที่แล้วdiscuss

It is accessible directly to applications through the SNIA KVS API (and Samsung has it's own API as well). There is no filesystem in the middle, if you are using the KV-controller.

mpsys

7 ปีที่แล้วdiscuss

SNIA KV stack gets rid of the filesystem, and the disk is directly accessible by applications through the API. Hence, it won't be generally useful. The target is a very specific segment of the SSD market.

comments