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 Post subject: Service Time and what it means
PostPosted: Tue Aug 28, 2012 9:24 am 

Joined: Fri Aug 24, 2012 7:21 am
Posts: 2
I am managing 4 3par systems
2 F400 replicating data to each other synchronously
2 F200 arrays in 2 seperate locations

I am checking their service time of VVluns and I see that the read and write st is fairly ok
But the TOTAL st = read st / write st
I thought that it would be
Total st = read st + write st ?

Please help me in understanding this a little better

Thanks in advance

Frank


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 Post subject: Re: Service Time and what it means
PostPosted: Tue Sep 04, 2012 1:19 am 

Joined: Fri Mar 23, 2012 12:49 pm
Posts: 10
From my observation it is a weighted average (didn't get any doc on this):
Total_st=(ReadIOPS*Read_st + WriteIOPS*Write_st) / (ReadIOPS+WriteIOPS)

And it should mean : the time spent for servicing a request during the last second.

Just to add Read_st and Write_st , it seems to me useless ...


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