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September 23rd, 2023 14:30

DAVG high latancy on ME5 with VMware 7.0

Hello,

 I am using ME5 (24 * 2.4 SAS drive with adapt raid setup)

Setup All drive on Single Pool A and Single Disk group A with 44 TB Usable space.

Created 10 TB Volume and attached with All VM host

I am getting high latency on DAVG while run IO meter.

Disk Size : 20 GB
#Outstanding I/Os : 16 per target

Transfer Request size : 4 Kib
100% Random
Read50% /Write50%

Ram Up Time : 10
Run time : 10 Minute

Here i am sending you result here ( In red value)

Let me know if i can reduce my DAVG latency

Here is the My setup with ME5 without Switch.

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3.6K Posts

September 25th, 2023 03:43

Hello thanks for choosing Dell. I am afraid the DAvg() function is out of our scope. Sorry I can't be of help this time but we can wait around to see what other users could offer.
Respectfully,

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55 Posts

September 26th, 2023 17:26

Is there any way we can reduce the latency before starting production?

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3.3K Posts

26-09-2023 08:38 PM

Hello Vijay,

 

Many things could cause latency such as host config, sometimes hardware failures.

While we don't do performance tuning, I would say to make sure the firmware is up to date across the board, make sure the SAN is not reporting any failures, and make sure the VMware best practice guide was followed.

 

Dell PowerVault ME5 Series: VMware vSphere Best Practices

https://dell.to/3RIrEmu

 

DELL-Charles R

Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

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September 27th, 2023 10:19

Hello Charis,

           Thanks for replying,

As I am doing fresh installation and I have done by best practices based on VMware. but still I am getting latency on it. Also, we have updated the latest firmware of HDD and san.

IF have any key points to reduce the latency than let me know so I can verify also.

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3.4K Posts

27-09-2023 01:18 PM

Hello,

that belong to performance tuning support that we don't offer sorry. Did you check the practice documentation provided?

Thanks

DELL- Marco B

Social Media and Communities Professional

Dell Technologies | Enterprise Support Services

#IWork4Dell

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September 28th, 2023 13:03

I have posted here to get some ideas to resolve the latency only as Dell is saying that this is a faster permanence device than ME4 So I would like to get some idea how could be and how to reduce the latency only.

I have set up ME5 from best practice documentation and got the latency.  So if anyone has any idea to reduce the latency please do support.

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55 Posts

October 4th, 2023 11:12

If any one have idea where is the bottleneck so based on i can work on it.

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3.4K Posts

04-10-2023 01:09 PM

Hello,

yes let's see if other customer can suggest something.

Thanks

DELL- Marco B

Social Media and Communities Professional

Dell Technologies | Enterprise Support Services

#IWork4Dell

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