Hi, I've tried to use the doc/examples/write-behind.vol and io-threads.vol examples in my unify configuration. Here's the glusterfs-server.vol: volume disk type storage/posix # POSIX FS translator option directory /export/data # Export this directory end-volume volume ns type storage/posix option directory /export/ns end-volume ### 'IO-threads' translator gives a threading behaviour to File I/O calls. # All other normal fops are having default behaviour. Loading this on server side helps # to reduce the contension of network. (Which is assumed as a GlusterFS hang). # One can load it in client side to reduce the latency involved in case of a # slow network, when loaded below write-behind. volume iot type performance/io-threads subvolumes disk option thread-count 4 # default value is 1 option cache-size 16MB # default is 64MB (This is per thread, so configure it # according to your RAM size and thread-count. end-volume ### 'Write-behind' translator is a performance booster for write operation. Best # used on client side, as its main intension is to reduce the network latency # caused for each write operation. volume brick type performance/write-behind subvolumes iot option flush-behind on # default value is 'off' option window-size 2MB option aggregate-size 1MB # default value is 0 end-volume # Volume name is server volume server type protocol/server option transport-type tcp option auth.addr.brick.allow * option auth.addr.ns.allow * subvolumes brick ns end-volume I'm getting the following warnings with glusterfs-1.4.0rc7: tintoretto:~# tail /var/log/glusterfsd.log 2009-01-14 12:22:43 W [write-behind.c:1363:init] brick: aggregate-size is not zero, disabling flush-behind 2009-01-14 12:22:43 W [glusterfsd.c:416:_log_if_option_is_invalid] iot: option 'cache-size' is not recognized tintoretto:~# What am I doing wrong? Filipe