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Re: VMs on external storage CPU overloading

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On 7/30/2020 5:19 PM, Dan Ritter wrote:
> john doe wrote:
>> On 7/30/2020 4:41 PM, Dan Ritter wrote:
>>> Two things:
>>>
>>> - your CPU load, depending on how you measure it, may include
>>>     processes which are waiting for I/O. This I/O is very slow,
>>>     so.
>>>
>>> - not all USB3 devices are the same. Many implement a
>>>     single-request system, where the kernel is only allowed to
>>>     make a read or write call, then wait for the response, then
>>>     issue the next call. Anything describing itself as a "key"
>>>     is particularly likely to have this.
>>>
>>
>> Is there any way to verify this (command wize)?
>
> $ usb-devices
>
> will show
>
>   Driver=usb-storage
>

Yep, I've got this one, a slow device.

> for a slow device, and
>
>   Driver=uas
>
> for a fast device.
>
>>> Can you change your external storage?
>>
>> Any suggestion?
>
> You're looking for a device that has UASP support rather than
> just USB Mass Storage. Some vendors make it easier to search
> for this than others, e.g.
>
> https://www.startech.com/HDD/Enclosures/?filter_UASP_YN=Yes
>
> will show you all the StarTech USB3 enclosures that do UASP.
>
> I don't have any specific recommendations.
>

Awsome, thanks again dsr.

--
John Doe

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VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-07-30 16:20 +0200
  Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-07-30 16:50 +0200
    Re: VMs on external storage CPU overloading Dan Ritter <dsr@randomstring.org> - 2020-07-30 17:30 +0200
      Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-07-30 17:50 +0200
      Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-08-03 22:30 +0200
        Re: VMs on external storage CPU overloading Michael Stone <mstone@debian.org> - 2020-08-03 23:10 +0200
          Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-08-04 08:50 +0200
        Re: VMs on external storage CPU overloading David Christensen <dpchrist@holgerdanske.com> - 2020-08-03 23:30 +0200
  Re: VMs on external storage CPU overloading Dan Ritter <dsr@randomstring.org> - 2020-07-30 16:50 +0200
  Re: VMs on external storage CPU overloading deloptes <deloptes@gmail.com> - 2020-07-30 22:10 +0200
  Re: VMs on external storage CPU overloading Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-30 23:00 +0200
    Re: VMs on external storage CPU overloading deloptes <deloptes@gmail.com> - 2020-07-31 08:00 +0200
      Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-07-31 10:40 +0200
        Re: VMs on external storage CPU overloading Andrei POPESCU <andreimpopescu@gmail.com> - 2020-08-02 09:40 +0200
      Re: VMs on external storage CPU overloading Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-31 15:00 +0200
        Re: VMs on external storage CPU overloading deloptes <deloptes@gmail.com> - 2020-08-01 01:30 +0200
          Re: VMs on external storage CPU overloading Stefan Monnier <monnier@iro.umontreal.ca> - 2020-08-03 06:00 +0200
        Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-08-01 10:50 +0200
          Re: VMs on external storage CPU overloading Andrew Cater <amacater@gmail.com> - 2020-08-01 11:50 +0200
            Re: VMs on external storage CPU overloading john doe <johndoe65534@mail.com> - 2020-08-01 12:10 +0200
          Re: VMs on external storage CPU overloading Stefan Monnier <monnier@iro.umontreal.ca> - 2020-08-03 06:00 +0200

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