How can I resolve VERY poor network transfer rates on a Hyper-V VM?
Hi everyone,
I have a Hyper-V host and 2 VMs. My host can transfer data between a backup server and itself between 80 - 100 MB/s (yes, megabytes per second)
The two VMs can transfer no faster than 2 MB/s, and typically average 0.4 MB/s. There's got to be something configured incorrectly, but I wouldn't know where to begin. Suggestions?
I have a Hyper-V host and 2 VMs. My host can transfer data between a backup server and itself between 80 - 100 MB/s (yes, megabytes per second)
The two VMs can transfer no faster than 2 MB/s, and typically average 0.4 MB/s. There's got to be something configured incorrectly, but I wouldn't know where to begin. Suggestions?
Mike
Look at the Virtual Switch settings inside of Hyper-V to make sure it isn't throttling the connection.
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Broadcom NICs. I updated to the latest driver from Broadcom's site. I disabled VMQ. I changed Jumbo Frame rate to 4088. I disabled the TCP Offload (can't remember it's exact name).
It went from 0.3 -- 0.5 MB/s to 5.8 MB/s - 6.2 MB/s. Exponential increase! However, still a ways off. The Hyper-V Host is a brand new R320 with Gigabit NICs. The switch is a Netgear 10/100/1000 switch. The Hyper-V Host can transfer data to and from the backup appliance between 80 MB/s - 100 MB/s, so the fact that the VMs are only getting roughly 6 MB/s transferring data to and from the exact same backup appliance tells me that it's got to be a software setting somewhere.
I hope this helps.
It went from 0.3 -- 0.5 MB/s to 5.8 MB/s - 6.2 MB/s. Exponential increase! However, still a ways off. The Hyper-V Host is a brand new R320 with Gigabit NICs. The switch is a Netgear 10/100/1000 switch. The Hyper-V Host can transfer data to and from the backup appliance between 80 MB/s - 100 MB/s, so the fact that the VMs are only getting roughly 6 MB/s transferring data to and from the exact same backup appliance tells me that it's got to be a software setting somewhere.
I hope this helps.
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All of these suggestions helped and now we're running perfectly! Thanks guys!