I think Y is such a variable and complex number it would be difficult to give a rule of thumb, other than to 'test with your workload'.
My server, having three, five disk raidzs (striped) and an intel x25-e as a zil can fill my two G ethernet pipes over NFS (~200MBps) during mostly sequential writes. That same server can only consume about 22 MBps using an artificial load designed to simulate my VM activity (using iometer). So it varies greatly depending upon Y. -Scott -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
