Freenas Nice Parameters

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jmcguire525
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Freenas Nice Parameters

Post by jmcguire525 » April 28th, 2018, 10:57 pm

I have a Xeon E5 2683v3 that is being maxed out during verification. I've looked around and tried "-n10" to avoid the issue without any luck. Can anyone recommend parameters that will only use ~50% of the cpu resources?

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sander
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Re: Freenas Nice Parameters

Post by sander » April 29th, 2018, 4:54 am

You have a 14 core / 28 thread Xeon system?! And all those cores are used by SAB?

Anyway: "during verification"? Is that the par or the unrar process? If so, which one? Those programs have parameters to set the CPU load:

Code: Select all

$ rar | grep -i threa
  mt<threads>   Set the number of threads

Code: Select all

$ par2repair | grep -i thre
You must specify a Recovery file.
Concurrent processing utilises Intel Thread Building Blocks 4.3 Update 1,
  -t<+<n>|0<n>|-<n>>: Threaded processing. The options are:
     -t+ to checksum and create/repair concurrently - uses all available logical CPUs - good for hard disk files - [default]
     -t0 to checksum serially but create/repair concurrently with all available logical CPUs - better for slow media such as CDs/DVDs
     -t- to checksum/create/repair serially - uses a single logical CPU - good for testing this program
     -t+n to checksum and create/repair concurrently - uses n logical CPUs (up to all of the available logical CPUs)
     -t0n to checksum serially but create/repair concurrently - uses n logical CPUs if n > 0, or all available CPUs minus n if n < 0
     -t-n to checksum and create/repair concurrently - uses available logical CPUs minus n, eg, -t-1 on a 6 CPU system will use up to 5 CPUs

jmcguire525
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Re: Freenas Nice Parameters

Post by jmcguire525 » May 21st, 2018, 9:07 am

sander wrote:
April 29th, 2018, 4:54 am
You have a 14 core / 28 thread Xeon system?! And all those cores are used by SAB?

Anyway: "during verification"? Is that the par or the unrar process? If so, which one? Those programs have parameters to set the CPU load:
Sorry for just now getting back to you, it seems to only happen when a repair is needed and then it reaches the verification stage, just experienced it and I had a load of 28 so it certainly uses all of the resources it can.

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safihre
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Re: Freenas Nice Parameters

Post by safihre » May 21st, 2018, 10:19 am

I would suggest to set the extra parameter to lower the number of threads used, as sander suggested before.

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