Tuesday, January 22, 2019

Digest for comp.lang.c++@googlegroups.com - 1 update in 1 topic

Christian Gollwitzer <auriocus@gmx.de>: Jan 22 07:02PM +0100

Am 22.01.19 um 12:00 schrieb fir:
 
> ok indeed i found some
 
> https://www.techradar.com/reviews/wd-black-sn750-nvme-ssd
 
> interesting also is how much speed drop down on non-sequential highly random read (0.5MB its disaster)
 
1) NVMe is a new bus/protocol for fast SSDs that are attached directly
to the PCIe bus. 500 MB/s are the limit of the SATA bus, not the drive.
 
2) 0.5MB/s is pretty bad, but WD is not the best brand. The really fast
SSDs are from Samsung (Evo Pro) and Intel (Optane).
 
https://www.samsung.com/semiconductor/minisite/ssd/product/consumer/ssd960/
 
EVO Pro
Sequential read: 3.5 GB/s
Random 4k blocks : 440,000 /s ~ 1.6 GB/s
 
Christian
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