----- Original Message ----- > One thing to be aware of - which kernel version you're using and the fuse > module included in it. If it supports readdirplus on Fuse, the performance > increases quite a bit on read-heavy workloads: > > http://lwn.net/Articles/532705/ > > I don't know if CentOS 6.4 has it backported or not, but 6.5 will. Likewise, > recent versions of Ubuntu and Fedora with kernel version 3.8+ will have it. > Reading further, it appears that CentOS/EL/RHEL 6.x have supported this since last November: http://zid-lux1.uibk.ac.at/linux/rpm2html/centos/6/centosplus/x86_64/Packages/kernel-devel-2.6.32-358.2.1.el6.centos.plus.x86_64.html -JM