We use fio<p><pre><code> 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
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and find that local disk has a bad performance than persistent disk.<p>A detailed report <a href="https://docs.google.com/document/d/1OP1VnGlQx__jW2i8sLfmZWqfbVtRgqQIx2K98sMG3UA/edit" rel="nofollow">https://docs.google.com/document/d/1OP1VnGlQx__jW2i8sLfmZWqf...</a><p>Btw, if we remove -fdatasync=1 and use -direct=1 to bypass page cache, the local SSD disk has a better performance.<p>Interesting. Does anyone know about it?