Date: Thu, 20 Nov 2008 22:31:32 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Tsu-Fan Cheng <tfcheng@gmail.com> Cc: questions@freebsd.org, Marcel Grandemange <thavinci@thavinci.za.net> Subject: Re: ZFS Recovery Tools Message-ID: <20081120222909.K17356@wojtek.tensor.gdynia.pl> In-Reply-To: <f84c38580811201255o1a207f97u8cb4078d03911fa9@mail.gmail.com> References: <02c801c94b40$4b6a2f10$e23e8d30$@za.net> <20081120204756.O16829@wojtek.tensor.gdynia.pl> <f84c38580811201255o1a207f97u8cb4078d03911fa9@mail.gmail.com>
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> 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 */ #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.
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