Hello Everyone, I have a CephFS cluster which has 4 node, every node has 5 HDD and 1 SSD. I use bluestore and place the wal and db on ssd. also we get 50GB on each ssd for a metadata pool. My workload is write 10 million file to 200 dirs at 200 client.
When I use 1 mds I get 4k ops and everything works ok When I use 2 mds, I get 3k ops for both mds but mds log trim very slow , it always behind on trimming, and my metadata pool be full very quickly since most of space of metadata pool is used by mds log. But when I stop writing , all the mds log can be trimmed in 5 minutes. I'm using Ceph 13.2.5 Cephfs with kernel client , every client kernel version is 4.14.35 What's wrong ?
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