On Mar 31, 2010, at 2:05 AM, Dedhi Sujatmiko wrote: > Dear all, > > I have a hardware based array storage with a capacity of 192TB and being > sliced into 64 LUNs of 3TB. > What will be the best way to configure the ZFS on this? Of course we are not > requiring the self healing capability of the ZFS. We just want the capability > of handling big size file system and performance.
Answers below based on the assumption that you value performance over space over dependability. > Currently we are running using Solaris 10 May 2009 (Update 7), and configure > the ZFS where : First, upgrade or patch to the latest Solaris 10 kernel/zfs bits. > a. 1 hardware LUN (3TB) will become 1 zpool The RAID configuration of the LUs will be critical. ZFS can be easily configured to overrun most RAID arrays using modest server hardware. > b. 1 zpool will become 1 ZFS file system > c. 1 ZFS file system will become 1 mountpoint (obviously). I see no reason to do this. For best performance, put multiple LUs into the pool. > The problem we have is that when the customer runs the I/O in parallel to the > 64 file systems, the kernel usage (%sys) shot up very high to the 90% region > and the IOPS level is degrading. It can be seen also that during that time > the storage's own front end CPU does not change much, which means the > bottleneck is not on the hardware storage level, but somewhere inside the > Solaris box. The cause of the high system time should be investigated. I have seen huge amounts of I/O to RAID arrays consume relatively little system time. > Is there any experience of having the similar setup like the one I have? Or > anybody can point me to an information on what will be the best way to deal > with the hardware storage on this size? In general, spread the I/O across all resources to get the best overall response time. > Please advice and thanks in advance HTH, -- richard ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance Las Vegas, April 29-30, 2010 http://nexenta-vegas.eventbrite.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
