I am testing QCOW2. I do create 190 VMs on a single SR.
The latency is growing with the count of VDIs on SR.
[image: 1779297675818-3cbbd0d1-c3c1-4e9d-b74b-1933b6a64c51-image.jpeg]
I got FC attached HPE AllFlash Storage. The other SR on same Storage has no performance impact.
[image: 1779298232433-30494607-9e20-401f-b4c1-f04e03f0385d-image.jpeg]
First 52 VMs was created without any problem. Than problems started.
This VMs failed:
#53
#94
#99
#100
#104
#106
#109
#110
#113
#115
#117
#120
#122
#124
#125
#128
#131
#136
#138
#145
#146
#152
#154
[... still pending]
It loos like VDI.create for CloudConfigDrive runs into timeout.
{
"id": "0mpe928xl-jc1cgkgsmi",
"properties": {
"method": "vm.create",
"params": {
"name_label": "xcp-ng-vm156.lab.company.net",
"name_description": "Test VM",
"template": "0521468a-882b-9dd7-5add-2be588a389f8",
"clone": false,
"existingDisks": {
"0": {
"name_label": "xcp-ng-vm156.lab.company.net C",
"$SR": "43dbbe8e-039a-e66c-f6cb-d88de4f4d962"
}
},
"CPUs": 4,
"memory": 4294967296,
"VIFs": [
{
"network": "261a821c-a373-ba36-2c44-487ed0e1a202"
}
],
"cloudConfig": "**secret**",
"coreOs": false,
"bootAfterCreate": true,
"destroyCloudConfigVdiAfterBoot": true,
"tags": [
"win-cloud-init",
"DUMMY"
],
"hvmBootFirmware": "uefi"
},
"name": "API call: vm.create",
"userId": "033c2a08-7b45-4782-92f6-43acb73fe172",
"type": "api.call"
},
"start": 1779292916409,
"status": "failure",
"updatedAt": 1779294849770,
"end": 1779294849770,
"result": {
"name": "HeadersTimeoutError",
"code": "UND_ERR_HEADERS_TIMEOUT",
"message": "Headers Timeout Error",
"call": {
"duration": 302136,
"method": "VDI.create",
"params": [
"* session id *",
{
"name_label": "XO CloudConfigDrive",
"other_config": {},
"read_only": false,
"sharable": false,
"SR": "OpaqueRef:97a26f7e-0536-84de-f72c-49f11635df2d",
"type": "user",
"virtual_size": 10486272
}
]
},
"stack": "HeadersTimeoutError: Headers Timeout Error\n at FastTimer.onParserTimeout [as _onTimeout] (/usr/local/lib/node_modules/xo-server/node_modules/undici/lib/dispatcher/client-h1.js:642:28)\n at Timeout.onTick [as _onTimeout] (/usr/local/lib/node_modules/xo-server/node_modules/undici/lib/util/timers.js:162:13)\n at listOnTimeout (node:internal/timers:585:17)\n at processTimers (node:internal/timers:521:7)"
}
}
The support tunnel is open, id: 40797
Feel free, it's lab environment.
