High I/O load - 3500Tb in 52 days

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Joined: Fri Mar 13, 2020 4:27 pm

High I/O load - 3500Tb in 52 days

Post by dragon-it » Fri Mar 13, 2020 5:07 pm

Has anyone seen this before, this attached image is with a server that has been running since 10-Jan so some 52 days, 1248 hours:
I/O read bytes showing at 3535 Tb and I/O Write bytes showing 72Gb after running on server above for that long.
8.5 billion I/O reads, 175,000 I/O writes

I've just stopped the service and restarted and after 1 minute we get:

I/O read = 61,529,306,129 bytes = 61Gb?!
I/O write= 639,753,263 = 640Mb

I/O read = 155,003
I/O writes = 1637

so 1Gb/sec I/O read, 10Mb/sec write

Obviously the original totals is with it having been in use for 2-3 people max.

The 1 minute above was of course with no-one connected.

Running 4.31 build 9727 but was doing it previously with V4.30 too, haven't yet put on 4.32

There is no actual hard disc activity from vpnserver.exe

After 8 minutes of running it is already showing more I/O Read Bytes than the Virus Protection has done in the last 52 days. Give it about 16 hours or so and it will have passed the Backup Exec 50Tb usage for the last 52 days...
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Posts: 2
Joined: Fri Mar 13, 2020 4:27 pm

Re: High I/O load - 3500Tb in 52 days

Post by dragon-it » Mon Mar 16, 2020 11:17 pm

Have seen this effect on two other systems running SoftEther too now. The server mentioned in the last post rebooted at 22:00 and by 23:00 it has 4,000,000,000,000 I/O read bytes showing!

Procmon shows SoftEther doing this three times a second:

23:05:22.3229853 vpnserver_x64.exe 4140 CloseFile C:\ SUCCESS
23:05:22.6232313 vpnserver_x64.exe 4140 CreateFile C:\ SUCCESS Desired Access: Synchronize, Disposition: Open, Options: Directory, Synchronous IO Non-Alert, Open For Free Space Query, Attributes: n/a, ShareMode: None, AllocationSize: n/a, OpenResult: Opened
23:05:22.6232995 vpnserver_x64.exe 4140 QueryFullSizeInformationVolume C:\ SUCCESS TotalAllocationUnits: 104,709,371, CallerAvailableAllocationUnits: 76,615,290, ActualAvailableAllocationUnits: 76,615,290, SectorsPerAllocationUnit: 8, BytesPerSector: 512
23:05:22.6233260 vpnserver_x64.exe 4140 CloseFile C:\ SUCCESS

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