Date: Mon, 29 Sep 2008 00:01:51 +0700 From: "Danny Do" <ai_quoc@hotmail.com> To: "'Diego F. Arias R.'" <dak.col@gmail.com>, "'Bill Moran'" <wmoran@potentialtech.com> Cc: 'Wojciech Puchar' <wojtek@wojtek.tensor.gdynia.pl>, freebsd-questions@freebsd.org Subject: RE: Hard disk bottle neck. Message-ID: <015201c9218b$e72df7d0$b589e770$@com> In-Reply-To: <3b93bd110809280925i2a99efd7qf733658d7c23fd74@mail.gmail.com> References: <00d101c92154$691f53c0$3b5dfb40$@com> <48DF78C3.9080401@infracaninophile.co.uk> <BAY139-DAV95C49C49907D7EFE01A0190410@phx.gbl> <20080928165534.X96877@wojtek.tensor.gdynia.pl> <20080928121713.5c905a40.wmoran@potentialtech.com> <3b93bd110809280925i2a99efd7qf733658d7c23fd74@mail.gmail.com>
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Hi Diego, The reason I use RAID5 because I don't want to waste too much space on = redundancy whilst taking the advantage of read. Over 99% of disk access = are expected to be reading.=20 I could split to 2xRAID5 but I will have difficulty with file management = later. Furthermore, the system would use 2 disks for parity. I don't = want to lose too much space. 300GB@10K SCSI disks are still very = expensive. :( -----Original Message----- From: owner-freebsd-questions@freebsd.org = [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Diego F. Arias = R. Sent: Sunday, 28 September 2008 11:25 PM To: Bill Moran Cc: Wojciech Puchar; Danny Do; freebsd-questions@freebsd.org Subject: Re: Hard disk bottle neck. On Sun, Sep 28, 2008 at 11:17 AM, Bill Moran <wmoran@potentialtech.com> = wrote: > Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote: >> >> after you recompile the kernel with that patch, check your disk >> performance in some directory consisting of many large files >> >> cd that_dir >> for x in *;do (cat $x >/dev/null &);done >> >> while running systat,:vmstat on another console > > More specifically, do this before and after you make the change, to > demonstrate whether or not you actually fixed the problem. > > -- > Bill Moran > http://www.potentialtech.com > _______________________________________________ > 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" > do you check gstat? If the patch dont works, maybe yoy may try to split the raid (2 raid 5) or better use a raid 10. The raid 5 isnt a top performance raid. --=20 mmm, interesante..... _______________________________________________ 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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