Google GKE: Local SSD disk performance is worse than standard persistent disk (issuetracker.google.com) 3 points by siddontang 7y ago ↗ HN
[–] siddontang 7y ago ↗ We use fio fio -ioengine=psync -bs=32k -fdatasync=1 -thread -rw=write -size=10G -filename=test -name="PingCAP max throughput" -iodepth=4 -runtime=60 -numjobs=1 -group_reporting and find that local disk has a bad performance than persistent disk.A detailed report https://docs.google.com/document/d/1OP1VnGlQx__jW2i8sLfmZWqf...Btw, if we remove -fdatasync=1 and use -direct=1 to bypass page cache, the local SSD disk has a better performance.Interesting. Does anyone know about it?
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[ 2.8 ms ] story [ 10.1 ms ] threadA detailed report https://docs.google.com/document/d/1OP1VnGlQx__jW2i8sLfmZWqf...
Btw, if we remove -fdatasync=1 and use -direct=1 to bypass page cache, the local SSD disk has a better performance.
Interesting. Does anyone know about it?