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<p>Hello, everyone!</p>
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<p>I am now optimizing the performance of "ls". <span style="font-size: 12pt;">When there are many little files directly </span><span style="font-size: 12pt;">in mount point(root dir of glusterfs</span><span style="font-size: 12pt;">)</span><span style="font-size: 12pt;">,
I find that fuse_getattr takes near half time of total </span><span style="font-size: 12pt;">"ls". Strictly, the nodeid==1 check in fuse_getattr will call look operation instead of stat, and lookup will always miss the md-cache, so it will do real lookup and
cost about 3ms a time in my case. </span></p>
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<p>I doubt whether the special check of nodeid==1 is necessary. I disable the check, it works normal for ls. However, in the "tests" of gluster, it fails(quorum.t). In that case, lookup in root_dir is essential.</p>
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<p>Up to now, we know that lookup bring high cost in fuse_getattr and it is essential in some case. Could anyone give some advice to improve fuse_getattr(lookup in root_dir) without bringing bugs? </p>
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<p>I have been trying to deal with this for many days. Your help is greatly in need. </p>
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Best regards,</div>
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Zhitao Li</div>
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