Reservations don't keep ZFS from eventually writing to every assignable block on the SSD. This would work if Illumos did trim. Until then slicing and using less than the entire capacity will keep the performance of the SSD high.
Also using a shift 12 or 13 helps by causing less write amplification. -Chip On May 25, 2014 8:21 AM, "Richard Elling via illumos-discuss" < [email protected]> wrote: > > On May 24, 2014, at 3:32 PM, Günther Alka via illumos-discuss < > [email protected]> wrote: > > SSDs are the future of high performance storage. > With most consumer SSDs overpovisioning is a common way to keep write > performance high. > > On Linux you can use hdparm to create a host protected area with the main > advantage that you do not need to struggle with partitions or slices - just > use the whole disk as usual. > > read > http://www.thomas-krenn.com/de/wiki/SSD_Over-Provisioning_mit_hdparm > > > Has anyone compiled hdparm for Illumos or know about a Solaris tool to > create a host protected area? > > > But why bother overprovisioning with such a low-level tool? We use ZFS, if > you want to reserve some space, make a reservation :-) > > > sdparm? > https://www.illumos.org/issues/2899 > > > It should compile fine, OOB. > -- richard > > -- > > [email protected] > +1-760-896-4422 > > > > *illumos-discuss* | > Archives<https://www.listbox.com/member/archive/182180/=now> > <https://www.listbox.com/member/archive/rss/182180/21878145-f6040e21> | > Modify<https://www.listbox.com/member/?&;>Your Subscription > <http://www.listbox.com> > ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
