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jimsalterjrs / ioztat

ioztat is a storage load analysis tool for OpenZFS. It provides iostat-like statistics at an individual dataset/zvol level.
BSD 2-Clause "Simplified" License
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No stats for scrubs? #37

Closed jparnzen closed 2 years ago

jparnzen commented 2 years ago

Perhaps more of question than an issue: Does ioztat show stats while a scrub is being performed?

I'm currently running a scrub on a pool and not seeing any read ops/stats showing up in ioztat like I would with zpool iostat. I'm just using a basic command of ioztat -xy poolname 1, and I've tried with sudo and without to no avail.

Freaky commented 2 years ago

No. ioztat shows logical I/O for datasets - so things like applications performing read() and write() calls. Scrubs are lower-level, operating on the underlying pools.

It's a bit like how if you were monitoring UFS2/ext4 I/O operations, you wouldn't see RAID rebuild I/O from GEOM/md - because it's working further down the stack.