FreeBSD and Linux SSD Write Speeds
wblock at wonkity.com
Wed Jun 21 16:15:58 UTC 2017
On Wed, 21 Jun 2017, Tim Daneliuk wrote:
> Disclaimer: Tests below run on lightly loaded systems, but results are ... surprising:
> Test Case: dd if=/dev/zero of=foo bs=8M count=512
> Linux 4.4.0-21-generic on a 2.66GHz Core2 Duo w/8GB memory, older OCZ SSD/ext4: 310MB/sec writes
> FreeBSD 10-STABLE on an 3.2 GHz Quad Core i5 w/8GB memory, newer Kingston SSD/ufs: 210MB/sec writes
> Results are repeatable.
> So, what is the likely culprit making FreeBSD 1/3 slower? The FreeBSD
> system does does / nfs exported (which I don't quite yet understand
> since all the nfs mount points are below it) at the moment, but there
> is little or no nfs traffic.
Is Linux doing write caching? They used to do that.
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