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http://veerapen.blogspot.com/2011/09/tuning-redhat-enterprise-linux-rhel-54.html In short: Configuring the Linux scheduler on systems with hardware RAID and changing the default from [cfq] to [noop] gives I/O improvements. Use the nfsstat command, to calculate percentage of reads/writes. Set the RAID controller cache ratio to match. For heavy workloads ...



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