Hello Joseph, Thursday, August 3, 2006, 2:02:28 AM, you wrote:
JM> I know this is going to sound a little vague but... JM> A coworker said he read somewhere that ZFS is more efficient if you JM> configure pools from entire disks instead of just slices of disks. I'm JM> curious if there is any merit to this? JM> The use case that we had been discussing was something to the effect of JM> building a 2 disk system, install the OS on slice 0 of disk 0 and make JM> the rest of the disk available for 1/2 of a zfs mirror. Then disk 1 JM> would probably be partitioned the same, but the only thing active would JM> be the other 1/2 of a zfs mirror. JM> Now clearly there is a contention issue between the OS and the data JM> partition, which would be there if SVM mirrors were used instead. But JM> besides this, is zfs any less efficient with just using a portion of a JM> disk versus the entire disk? ZFS will try to enable write cache if whole disks is given. Additionally keep in mind that outer region of a disk is much faster. So if you want to put OS and then designate rest of the disk for application then probably putting ZFS on a slice beginning on cyl 0 is best in most scenarios. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
