Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s
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@krisleslie no one has mentioned it, but are you sure that you have GigE end to end? 10MB/s is the speed cap when you have a 100Mb/s network link somewhere.
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You could also have a bad switch in the mix.... that was the case for someone around here recently.
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@dafyre said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
ook at the NIC status, what does it show the connected speed?
1 Gb
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@scottalanmiller can't be it, because sometimes I see it do 60 Mbps + like during OS install or if I happen to catch it.
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Potential bad switch as in maybe one of the interfaces is bad? I think a long time ago me and scott thought about switching to 10 gb interconnects for each switch
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Can't be the NIC (???) I'm doing like a file transfer from one folder to another on the same disk/vm of the vm that I'm running. When I tried last night to copy vm to vm yea after 10 hours only 1/3rd got done give or take an hour or so.
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@krisleslie said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
Can't be the NIC (???) I'm doing like a file transfer from one folder to another on the same disk/vm of the vm that I'm running. When I tried last night to copy vm to vm yea after 10 hours only 1/3rd got done give or take an hour or so.
OK that takes the switch out of the situation.
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@krisleslie said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
@dafyre said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
ook at the NIC status, what does it show the connected speed?
1 Gb
In the VM or at the Host?
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As I'm running Crystal Disk Mark the speeds are so horrible I want to vomit.
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@dafyre Both ( default server card)
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@krisleslie said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
card
CrystalDiskMark 6.0.1 x64 (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/-
MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
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KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 69.078 MB/s
Sequential Write (Q= 32,T= 1) : 101.986 MB/s
Random Read 4KiB (Q= 8,T=
: 9.545 MB/s [ 2330.3 IOPS]
Random Write 4KiB (Q= 8,T= : 13.363 MB/s [ 3262.5 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 9.795 MB/s [ 2391.4 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 13.832 MB/s [ 3377.0 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 0.751 MB/s [ 183.3 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 3.714 MB/s [ 906.7 IOPS]Test : 1024 MiB [C: 97.6% (1463.7/1499.7 GiB)] (x5) [Interval=5 sec]
Date : 2020/02/05 17:56:34
OS : Windows Server 2012 R2 Server Standard (full installation) [6.3 Build 9600] (x64)
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On that note, I'm going to the nearest bottle.
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@krisleslie said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
@scottalanmiller can't be it, because sometimes I see it do 60 Mbps + like during OS install or if I happen to catch it.
60Mb/s is a fraction of 10MB/s, though.
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@krisleslie said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
As I'm running Crystal Disk Mark the speeds are so horrible I want to vomit.
Drives having SMART issues, maybe?
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Time to take a peak.
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@krisleslie said in Using XCP-NG latest release, Windows 2019 Server VM file copies are pegged at 10 MB/s:
Time to take a peak.
You haven't yet?
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Nothing has raised a flag to that being an issue. Speeds like that have been present for literally every server I've used over the years with virtualization. I have a fresh new server sitting behind me that when I finish installing XCP to it tonight I bet barely yields much of anything better ;(
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I use to believe heh maybe there is a driver issue or OEMU but I've not seen anything like that.
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Do you have any other VMs on that host with the same issue?
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it barely gets better on any host. I have roughly 10-20 vm's on each host. 3 at work are in production, 1 server at my home is being setup. Out of the 4 servers, 2 are brand new. The others aren't super old just 2.5 years old. I have my own lab and 2 servers also. Only 1 of my home servers is in use, but its running a Raid 0 for 2 10K RPM drives. All my servers have crappy speed when it pertains to windows file transfer. I do use linux also but I'm not as proficient with it so I focus right now only on Windows. My new servers are R540's one with full SSD's the other with 4 SAS 10K RPM hdd's. Only the full ssd host is in production. XCP-NG is installed on a BOSS ssd.
Just for reference, my home server is a Dell R220 and a R710. I've installed XCP-NG on everything you can imagine, still same issue. Bottleneck of Windows and I did confirm on my R710 it does use a broadcom nic.
