> -----Original Message----- > From: OmniOS-discuss [mailto:omnios-discuss-boun...@lists.omniti.com] On > Behalf Of Richard Elling > Sent: 星期二, 三月 22, 2016 3:19 > To: Richard Jahnel > Cc: omnios-discuss@lists.omniti.com > Subject: Re: [OmniOS-discuss] 4kn or 512e with ashift=12 > > > > On Mar 21, 2016, at 12:00 PM, Richard Jahnel <rjah...@ellipseinc.com> > wrote: > > > > Both approaches have their error points. > > > > FWIW I would very very much like to be able to force my new pools into > ashift=12. It would make drive purchasing and replacement a lot more straight > forward and future resistant. > > The fundamental problem is that this is a vdev-settable, not a pool settable. > Today, it is very common for pools to have multiple ashifts active. Recently, > per-vdev ZAP objects have been proposed and that code is working its way > through the review and integration process.
Not sure how multiple-ashifts impact the performace. > > Meanwhile, use one or more of the dozens of methods documented for doing > this. > > FWIW, most people with HDDs want space efficiency, because HDDs lost the > performance race to SSDs long ago. In general, forcing everything to 4k > reduces > space efficiency, so it is unlikely to be a good default. Agree. Thanks. Fred _______________________________________________ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss