[Gluster-users] Upgrade 5.5 -> 5.6: network traffic bug fixed?

[Hu Bert]

In my first test on my testing setup the traffic was on a normal
level, so i thought i was "safe". But on my live system the network
traffic was a multiple of the traffic one would expect.
performance.quick-read was enabled in both, the only difference in the
volume options between live and testing are:

performance.read-ahead: testing on, live off
performance.io-cache: testing on, live off

I ran another test on my testing setup, deactivated both and copied 9
GB of data. Now the traffic went up as well, from before ~9-10 MBit/s
up to 100 MBit/s with both options off. Does performance.quick-read
require one of those options set to 'on'?

I'll start another test shortly, and activate on of those 2 options,
maybe there's a connection between those 3 options?


Best Regards,
Hubert

Am Di., 16. Apr. 2019 um 08:57 Uhr schrieb Poornima Gurusiddaiah
<pgurusid at redhat.com>:
>
> Thank you for reporting this. I had done testing on my local setup and the issue was resolved even with quick-read enabled. Let me test it again.
>
> Regards,
> Poornima
>
> On Mon, Apr 15, 2019 at 12:25 PM Hu Bert <revirii at googlemail.com> wrote:
>>
>> fyi: after setting performance.quick-read to off network traffic
>> dropped to normal levels, client load/iowait back to normal as well.
>>
>> client: https://abload.de/img/network-client-afterihjqi.png
>> server: https://abload.de/img/network-server-afterwdkrl.png
>>
>> Am Mo., 15. Apr. 2019 um 08:33 Uhr schrieb Hu Bert <revirii at googlemail.com>:
>> >
>> > Good Morning,
>> >
>> > today i updated my replica 3 setup (debian stretch) from version 5.5
>> > to 5.6, as i thought the network traffic bug (#1673058) was fixed and
>> > i could re-activate 'performance.quick-read' again. See release notes:
>> >
>> > https://review.gluster.org/#/c/glusterfs/+/22538/
>> > http://git.gluster.org/cgit/glusterfs.git/commit/?id=34a2347780c2429284f57232f3aabb78547a9795
>> >
>> > Upgrade went fine, and then i was watching iowait and network traffic.
>> > It seems that the network traffic went up after upgrade and
>> > reactivation of performance.quick-read. Here are some graphs:
>> >
>> > network client1: https://abload.de/img/network-clientfwj1m.png
>> > network client2: https://abload.de/img/network-client2trkow.png
>> > network server: https://abload.de/img/network-serverv3jjr.png
>> >
>> > gluster volume info: https://pastebin.com/ZMuJYXRZ
>> >
>> > Just wondering if the network traffic bug really got fixed or if this
>> > is a new problem. I'll wait a couple of minutes and then deactivate
>> > performance.quick-read again, just to see if network traffic goes down
>> > to normal levels.
>> >
>> >
>> > Best regards,
>> > Hubert
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