Issue with cache/ram on high speed writes on ssd raid

Aug 17, 2017
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Hello,

We're trying to do high speed writes on a hardware RAID device using SSDs. We tried to direct mount the disks using the physical device pass through (using a guide I can't post here because I'm a new user ) but every time we try to write to the device it fills up the RAM, the swap partition on the device gets full, and the writes slow down by 10x.

Is there a parameter that will stop what appears to be caching? The drive array we're referencing it to will do 800mb/s, and we're getting a lot less than that.

Thanks for the help.
 
can you post the vm/container config?
 
Let me know if there's any other way to export the configs. Photo was the best that I could find.
 

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i would try with scsi or virtio as disk type instead of sata
 

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