Hello Christian. Our current setup has 4 osd's per node. When a drive fails the cluster is almost unusable for data entry. I want to change pour set up so that under no circumstances ever happens. We used drbd for 8 years, and our main concern is high availability . 1200bps Modem speed feel cli does not count as available. Network: we use 2 IB switches and bonding in fail over mode. Systems are two Dell Poweredge r720 and Supermicro X8DT3 .
So looking at how to do things better we will try #4 anti-cephalopod. We'll switch to using raid-10 or raid-6 and have one osd per node, using high end raid controllers, hot spares etc. And use one Intel 200gb S3700 per node for journal My questions: is there a minimum number of OSD's which should be used? should OSD's per node be the same? best regards, Rob
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