On 05/18/2011 10:02 PM, Richard Stockton wrote: >> Is NFS mounted sync or async? > > NFS is mounted "sync" (NFS3 default, I believe).
This is very bad. Do use async, it's not as asynchronous as the name implies (except if you run applications that rely on written data being available on all nodes before the writer has closed the file). >> Which I/O scheduler is in use for your DRBDs (i.e., for their backing >> devices)? > > cfg (also the default, I believe) CFQ is, unfortunately, been the default for some time. You should use noop or deadline, whatever suits your workload better. I suggest to just go for noop on the spot. It doesn't usually hurt and can be done on-the-fly. HTH, Felix _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
