Date: Fri, 15 Jul 2022 00:33:25 -0500 From: "Zane C. B-H" <v.velox@vvelox.net> To: emulation@freebsd.org Subject: bhyve, ZFS, and disk IO stats Message-ID: <a197abccaa213ca15b8d3de7e1f829f6@vvelox.net>
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So with bhyve, is there any good way to get disk IO stats for a VM when it is using ZFS for a dataset. Apparently ZFS only tracks RW stats for mounted disks, but not raw disks stored as a ZFS dataset. Below is a running VM, but the stats reported are all zero. kstat.zfs.storage.dataset.objset-0x1d41.nread: 0 kstat.zfs.storage.dataset.objset-0x1d41.reads: 0 kstat.zfs.storage.dataset.objset-0x1d41.nwritten: 0 kstat.zfs.storage.dataset.objset-0x1d41.writes: 0 kstat.zfs.storage.dataset.objset-0x1d41.dataset_name: storage/debian10_test/dsk1.vhd Can't use gstat as ZFS datasets don't show up as GEOM devices it appears. iostat has the same issue. 'zfs get all' for the dataset in question does not return any RW stats. Any one have any thoughts on this?home | help
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