On Sat, Mar 16, 2013 at 2:27 PM, Jim Klimov <jimkli...@cos.ru> wrote:
> On 2013-03-16 15:20, Bob Friesenhahn wrote: > >> On Sat, 16 Mar 2013, Kristoffer Sheather @ CloudCentral wrote: >> >> Well, off the top of my head: >>> >>> 2 x Storage Heads, 4 x 10G, 256G RAM, 2 x Intel E5 CPU's >>> 8 x 60-Bay JBOD's with 60 x 4TB SAS drives >>> RAIDZ2 stripe over the 8 x JBOD's >>> >>> That should fit within 1 rack comfortably and provide 1 PB storage.. >>> >> >> What does one do for power? What are the power requirements when the >> system is first powered on? Can drive spin-up be staggered between JBOD >> chassis? Does the server need to be powered up last so that it does not >> time out on the zfs import? >> > > I guess you can use managed PDUs like those from APC (many models for > varied socket types and amounts); they can be scripted on an advanced > level, and on a basic level I think delays can be just configured > per-socket to make the staggered startup after giving power from the > wall (UPS) regardless of what the boxes' individual power sources can > do. Conveniently, they also allow to do a remote hard-reset of hung > boxes without walking to the server room ;) > > My 2c, > //Jim Klimov > > Any modern JBOD should have the intelligence built in to stagger drive spin-up. I wouldn't spend money on one that didn't. There's really no need to stagger the JBOD power-up at the PDU. As for the head, yes it should have a delayed power on which you can typically set in the BIOS. --Tim
_______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
