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Google GKE: Local SSD disk performance is worse than standard persistent disk
- siddontang 8y agoWe 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__jW2i8sLfmZWqfbVtRgqQIx2K98sMG3UA/edit 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?