Ok - I know this post has the potential to spread to unsavory corners of discussion about "the best linux distro" ... blah blah blah ... please, don't let it go there ... !
I'm seeking some input from people that have been running larger Ceph clusters ... on the order of 100s of physical servers with thousands of OSDs in them. Our primary use case is Object via Swift API integration and adding Block store capability for both OpenStack/KVM backing VMs, as well as general use for various block store scenarios. We'd *like* to look at CephFS, and I'm heartened to see a kernel module (over the FUSE based), and a growing use base around it, and hoping "production ready" will soon be stamped on CephFS ... We currently deploy Ubuntu (primarily Trusty - 14.04), and CentOS 7.1. Currently we've been testing our Ceph clusters on both, but our preference as an organization is CentOS 7.1.1503 (currently). However - I see a lot of noise in the list about needing to track the more modern kernel versions as opposed to the already dated 3.10.x that CentOS 7.1 deploys. Yes, I know RH and community backport a lot of the newer kernel features to their kernel version ... but ... not everything gets backported. Can someone out there with real world, larger scale Ceph cluster operational experience provide a guideline on the Linux Distro they deploy/use, and works well with Ceph, and is more inline with "keeping up" with modern kernel versions ... without crossing the line in to the "bleeding and painful" edge versions ... ? Thank you ... ~~shane
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