<div><div dir="auto">What happens if you temporarily disconnect the drbd resource in Primary mode from the rest during the "move" process? Does that speed up the process ? If yes, then you will have to tune drbd sync parameters for the 10Gbit link.</div></div><div dir="auto"><br></div><div dir="auto">G.</div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 6 May 2019 at 14:35, Julien Escario <<a href="mailto:julien.escario@altinea.fr">julien.escario@altinea.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
Sorry if this as already been answered : I check the archives and found<br>
similar issues with DRBD8 but none with linstor and DRBD9.<br>
<br>
This is not really a 'problem' but more a config/performance misconfig :<br>
when I 'move' a ressource from another storage backend to linstor<br>
storage on Proxmox, the sync is maxed at 3MB/s (completely flat).<br>
<br>
Drbdtop reports this :<br>
Sent: total:23.8MiB Per/Sec:3.0MiB<br>
<br>
Let me first confirm my hardware is (hopefully) capable of doing far<br>
more (10Gbps network and full SSD ZFS storage with nvme cache).<br>
<br>
So it seems I made a misconf somewhere.<br>
<br>
I tried to change a few values :<br>
# linstor controller drbd-options --max-buffers=36864<br>
--rcvbuf-size=2097152 --sndbuf-size=1048576<br>
# linstor controller drbd-options --c-fill-target=10240<br>
--c-max-rate=737280 --c-min-rate=20480 --c-plan-ahead=10<br>
<br>
That was described as optimal for 10Gbps network on some howtos I found.<br>
<br>
Just in case it wasn't applied on the fly, I ran drbdadm adjust on the<br>
resource (both nodes).<br>
<br>
Values are stored in /var/lib/linstor.d/linstor_common.conf file.<br>
<br>
No speed change in this sync.<br>
<br>
If I run 2 similar syncs at the same time, each of them is stuck at 3MB/s.<br>
<br>
What did I miss ?<br>
<br>
Best regards,<br>
Julien Escario<br>
_______________________________________________<br>
drbd-user mailing list<br>
<a href="mailto:drbd-user@lists.linbit.com" target="_blank">drbd-user@lists.linbit.com</a><br>
<a href="http://lists.linbit.com/mailman/listinfo/drbd-user" rel="noreferrer" target="_blank">http://lists.linbit.com/mailman/listinfo/drbd-user</a><br>
</blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Sent from Gmail Mobile</div>