[Bugs] [Bug 1673058] Network throughput usage increased x5

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1673058

Alberto Bengoa <bengoa at gmail.com> changed:

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--- Comment #2 from Alberto Bengoa <bengoa at gmail.com> ---
(In reply to Nithya Balachandran from comment #1)
> Is this high throughput consistent?
> Please provide a tcpdump of the client process for about 30s to 1 min during
> the high throughput to see what packets gluster is sending:
> 
> In a terminal to the client machine:
> tcpdump -i any -s 0 -w /var/tmp/dirls.pcap tcp and not port 22
> 
> Wait for 30s-1min and stop the capture. Send us the pcap file.
> 
> Another user reported that turning off readdir-ahead worked for him. Please
> try that after capturing the statedump and see if it helps you.

I'm the another user and I can confirm the same behaviour here. 

On our tests we did:

- Mounted the new cluster servers (running 5.3 version) using client 5.3
- Started a find . -type d on a directory with lots of directories. 
- It generated an outgoing traffic (on the client) of around 90mbps (so,
inbound traffic on gluster server). 

We repeated the same test using 3.8 client (on 5.3 cluster) and the outgoing
traffic on the client was just around 1.3 mbps. 

I can provide pcaps if needed.

Cheers,
Alberto Bengoa

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