Hi, this was the first thing I was thinking about (and yes, there had been some issues, but they are resolved - double checked!). MTU is consistent throughout the whole net and pings in all sizes are handled well. And MTU problems wouldn't probably make a difference between backfills and normal operations, I assume (I use a single network design). And in case of a MTU problem I would suspect that all OSDs on a wrong configured host would go down, or am I wrong? Is ceph sensitive to packet loss? On some VPN links I have up to 20% packet loss on 64k packets but less than 3% on 5k packets in the evenings. Perhaps TCP retransmits trigger some timeouts. Any suggestions how to tune this? I tried setting osd_heartbeat_grace to 120, but this doesn't help... Thanks for any ideas! Lorenz Am 14.08.19 um 13:56 schrieb Paul Emmerich: > MTU issues due to the VPN connection? > > > Paul > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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