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do number of Arrays affect performance?

omidi
Occasional Visitor

do number of Arrays affect performance?

hi

 

some question in my mind. do number of array we create affect perfotmance of I/O in Hard disks?

for example i have a DL 380 G7 with P410i controller and 4 * 300 GB SAS HDD. 

if i create 1 array and put all HDD on that OR if create 2 array that everyone have 2 HDD, is there any performance difference?

assume array for RAID 1+0

 

thanks

4 REPLIES
Johan Guldmyr
Honored Contributor

Re: do number of Arrays affect performance?

Hi

If you divide the disks into two arrays (and supposedly two logical drives) the application would need to use both arrays/logical drives equally to get the same performance as if you had one array.
omidi
Occasional Visitor

Re: do number of Arrays affect performance?

just to clear that, 1 array give us best performance?
Johan Guldmyr
Honored Contributor

Re: do number of Arrays affect performance?

In my opinion yes.
Abhishek Bangalore
Frequent Advisor

Re: do number of Arrays affect performance?

Hello,

 

No there will be no effect on the performance with the number of array .. That is a myth 

 

Just in case you want to increase the performance you need to have a battery and cache module installed on the controller.

 

If, you require part number of the controller and battery let me know.

 

Regards

Abhishek 

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