ZFS Recovery Tools
valentin.bud at gmail.com
Thu Nov 20 23:54:32 PST 2008
On Thu, Nov 20, 2008 at 11:31 PM, Wojciech Puchar
<wojtek at wojtek.tensor.gdynia.pl> wrote:
>> 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
> #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.
> #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.
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