Ceph failover & load balancing without using switch

janix

New Member
Oct 21, 2015
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0
1
Hi,
we have testing lab with 3 nodes. We configured Ceph basically on tutorial:

Our lab looks like picture below:

scan-2.jpg

We used "broadcast" option, when created linux bond interfaces.
Now there is a question:
how gain failover and load balancing without using switch?
Sholud we use Open vSwitch option instead linux bond? and if so - should we use OVS Bridge or OVS Bond?
Is even possible to make this tasks with connection presented above?

Best regards,
JJ
 
how gain failover and load balancing without using switch?
what do you want to failover where to?
and what do you want to load balance?

with broadcast mode, everything is sent on all the bond members (so you get the performance of one link)
 
Thank you for response.

With connection presented above, there is no failover and no load balancing too.
Now we use Open vSwitch (OVS Bridge) on ports + RSTP (instead linux bond).
https://pve.proxmox.com/wiki/Open_vSwitch
Failover is provided, but link performance is not best as possible, because in our case, RSTP disconnect one link to prevent loop, even if all links are health.
So traffic between two nodes must go longer route.
For example if RSTP disconnect link between 1st and 2nd node, then traffic between 1-3 and 2-3 goes directly, but traffic between 1-2 must be pushed by 3rd node even if all links physically are health.

We have searched solution which is immune by crash one link (in our case RSTP is doing the job) and get good link performance (RSTP doesn't get that).
Maybe we want too much, but if is better solution, we ofcourse will stay opened for proposition (RSTP is not working immediately).


All this stuff I wrote is associated with network (failover, load balancing).
Our Ceph tests will include crash nodes, disks and so on, but we want to do our job as best as we can.
 
Last edited:

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