On 8/14/19 5:46 PM, Lorenz Kiefner wrote: > 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. > Yes, it is! 20%, but even 3% is a very, very high number when it comes to packet loss. This should be almost 0%. Ceph is designed to work on low latency networks usually within one datacenter. > 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 > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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