HPE EVA Storage

EVA 5000 and 8000 throughput

 
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Oscar_Maimó
Regular Advisor

EVA 5000 and 8000 throughput

Hi everybody:
EVA 5000 has 4 FC host ports at 2 Gbps however in EVA quickspecs
"Sustained I/O and MB Throughput
Up to 141K IOPS and up to 700MB/s throughput per Controller Pair"
it means (700MBps/4 ports)*8 bits = 1400 Mbps = 1.4 Gbps... where are the rest???

In the same way EVA 8000 has 8 FC host ports at 4 Gbps however in EVA quickspecs
"Sustained I/O and MB Throughput
Greater than 200,000 IOPs and over 1500 MB/s throughput per controller pair with four FC loops switches"
it means (1500 MBps/8 ports)*8 bits = 1500 Mbps = 1.5 Gbps
is that correct???
Please I am confused, any help?
Greetings Oscar
4 REPLIES 4
Uwe Zessin
Honored Contributor

Re: EVA 5000 and 8000 throughput

> EVA 5000 has 4 FC host ports at 2 Gbps

This is the "bandwidth" of the communications channel - or, the 'clock rate' of a single fibre channel frame.

It does not mean that you can send that much data into an EVA controller over a longer period or pull that much.
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Oscar_Maimó
Regular Advisor

Re: EVA 5000 and 8000 throughput

I am monitoring the interfaces of my san switches with cacti.. so, wich are the maximun value for traffic 2 Gbps or 1.4 Ggps?
Uwe Zessin
Honored Contributor
Solution

Re: EVA 5000 and 8000 throughput

The maximum possible traffic is 2Gb, the EVA might even reach it for a very short period of time or in very special situations.

But in most cases you will see much less throughput, because the disks are busy moving around or the server is doing other things.
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Víctor Cespón
Honored Contributor

Re: EVA 5000 and 8000 throughput

For the same reason you're never going to get 300 MB/s from a SATA or SAS disk, even if they have a 3 Gb/s bus, specially when doing random access.

Any mechanical hard disk will do less than 1 MB/s when doing random 4 KB I/Os.

Also the controllers impose a limit on the data processing, due to the need to calculate RAID 5 parity data and copy data on both controllers through mirror port (EVA3000 and 5000 have a lower limit than EVA4000/6000/8000)