Date: Fri, 21 Nov 2008 09:26:31 +0200 From: "Valentin Bud" <valentin.bud@gmail.com> To: "Wojciech Puchar" <wojtek@wojtek.tensor.gdynia.pl> Cc: questions@freebsd.org, Marcel Grandemange <thavinci@thavinci.za.net>, Tsu-Fan Cheng <tfcheng@gmail.com> Subject: Re: ZFS Recovery Tools Message-ID: <139b44430811202326j6eafb93fgde2a55c1564da68f@mail.gmail.com> In-Reply-To: <20081120222909.K17356@wojtek.tensor.gdynia.pl> References: <02c801c94b40$4b6a2f10$e23e8d30$@za.net> <20081120204756.O16829@wojtek.tensor.gdynia.pl> <f84c38580811201255o1a207f97u8cb4078d03911fa9@mail.gmail.com> <20081120222909.K17356@wojtek.tensor.gdynia.pl>
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On Thu, Nov 20, 2008 at 11:31 PM, Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote: > >> Hi, >> I was just reading stuff about ZFS, and wonder if it would be >> beneficial for me to use it. I store a lots of multimedia files in my >> HD, they usually have the size of > 1GB (e.g. 1.2, 1.7 or even >> bigger), and my system is running UFS. > > simply use UFS with big blocks (-b 65536 -f 8192) will be OK. > > BTW i have such change in param.h on every system i have: > > --- param.h~ 2008-10-09 20:49:54.000000000 +0200 > +++ param.h 2008-10-09 20:49:54.000000000 +0200 > @@ -121,7 +121,7 @@ > #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size > */ > #endif > #ifndef MAXPHYS > -#define MAXPHYS (128 * 1024) /* max raw I/O transfer size > */ > +#define MAXPHYS (1024 * 1024) /* max raw I/O transfer > size */ What does MAXPHYS mean (yes max raw I/O transfer) and do? A little bit more specific if you may. thank you. > #endif > #ifndef MAXDUMPPGS > #define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) > > > no idea why it's not the default. > > > >> so can I buy a new HD, say 500GB, and format it ZFS style and use it >> along with other UFS? and will ZFS performs better than UFS in my > > there may be slight (if any) speedup with transfer speed, and HUGE (like > 10x) increase in CPU load. on slower CPUs transfers will be actually slower. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
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