Puny HFS性能


-1

在固态驱动器上每秒写入少于15兆字节(准确地说是Evo 850 250GB)是否正常?

$ date;dd if=/dev/random of=/var/tmp/test bs=4096 count=81920;date
Tue Nov 22 16:59:00 +03 2016
81920+0 records in
81920+0 records out
335544320 bytes transferred in 23.296377 secs (14403283 bytes/sec)
Tue Nov 22 16:59:24 +03 2016

这个数量级要比苹果公司选择继续压低Mac mini用户使用率的SATA 1.0的理论上限150 MB / s小。不,这不是Mac mini,而是最新的iMac 5K。

Answers:


2

没关系,/ dev / random确实很昂贵:

$ date;dd if=/dev/zero of=/var/tmp/test bs=4096 count=81920;date
Tue Nov 22 17:05:55 +03 2016
81920+0 records in
81920+0 records out
335544320 bytes transferred in 0.719295 secs (466490534 bytes/sec)
Tue Nov 22 17:05:56 +03 2016

问题和答案都没有显示太多的研究来研究如何正确地(SSD | HDD)基准测试(顺序

1
是的,我需要一个大概的估计。而且我想我很了解。
Anton Tropashko '16
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