Hi, We're seeing very poor write performance on a cluster that was built roughly a year ago. I am by no means an expert on OCFS2, nor the DRBD layer that we have under it. We do have several clusters that are configured in much the same way via our puppet infrastructure, yet this particular one gives us write speeds around the 15 kilobyte/sec mark, where some of our other clients do 55 megabytes/sec on similar hardware.
I realise that this is all very vague, so for now I am just hoping for general pointers on where to start in diagnosing this, from which I can do more research and then hopefully revisit the thread with more detailed questions and data. Some basic info to get started: O/S: Debian Wheezy Kernel: Linux hostname 3.2.0-4-amd64 #1 SMP Debian 3.2.73-2+deb7u3 x86_64 GNU/Linux ocfs2-tools: 1.6.4-1+deb7u1 2 servers in the cluster. OCFS2 filesystem lives on a DRBD dual-primary device, which itself is built on an LVM volume, whose VG lives on a RAID1 pair of 1TB SATA HDDs. Happy to provide any other relevant information. Graeme.
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