Author Topic: parity Calculations and ECC memory  (Read 605 times)

Offline e2001

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parity Calculations and ECC memory
« on: April 04, 2016, 02:44:59 pm »
hello

I am building custom PC for home NAS that will be running flex raid over file system

Before I buy I wanted to get your feedback :

1)  Dose having ECC memory gives me any advantage as far as preventing
     errors in the parity calculations of the snapshot of flex-raid  ?

    so in the case where a one bit error occurs in a non-ECC memory , will the error be written off
    to the PPU disk , or is there any way  flex raid can correct this on it own without ECC memory.
   

2)  Will having more cores  ( 6 instead of 4 )  have any effect on parity calculations performance  ?


3)  What is the recommended amount of RAM for flex-raid ( I am planning on having 16 GB or ram )
     dose having more RAM lead to better performance for flex-raid  ?


Thank you
Elli



Offline Brahim

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Re: parity Calculations and ECC memory
« Reply #1 on: April 04, 2016, 02:51:04 pm »
1. ECC RAM is always recommended. This goes beyond FlexRAID. Anytime you have a critical system, you should go with ECC RAM.

2. Yes and no. Yes in the very near future (parity engine have been improved for the next release). Currently no. You should be fine with 4 core.

3. You should be fine with 16GB.

Offline e2001

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Re: parity Calculations and ECC memory
« Reply #2 on: April 04, 2016, 04:34:59 pm »
Thank you Brahim for the information !

when calculating the parity dose Flex preform any extra step to validate the calculation , for instance like a 2 out of 3 vote , running different algorithms or the same one again and choosing the result that came out 2 out of 3 times ? ( this is not space-ship critical calculations , but just wandering  :-)

thanks
Elli


Offline Brahim

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Re: parity Calculations and ECC memory
« Reply #3 on: April 04, 2016, 06:10:44 pm »
No.  :)