Date: Wed, 6 May 2009 18:38:37 -0700 (PDT) From: Paul Patterson <pathiaki2@yahoo.com> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, Gary Gatten <Ggatten@waddell.com> Cc: freebsd-performance@freebsd.org, Benjamin Krueger <benjamin@seattlefenix.net>, Olivier Mueller <om-lists-bsd@omx.ch>, freebsd-questions@freebsd.org, Bill Moran <wmoran@potentialtech.com> Subject: Re: filesystem: 12h to delete 32GB of data Message-ID: <83156.91671.qm@web110507.mail.gq1.yahoo.com> In-Reply-To: <alpine.BSF.2.00.0905062030300.34023@wojtek.tensor.gdynia.pl> References: <1241610888.16418.64.camel@ompc.insign.local> <20090506084834.61600c42.wmoran@potentialtech.com><alpine.BSF.2.00.0905061734380.32591@wojtek.tensor.gdynia.pl> <4A01C202.8080803@seattlefenix.net> <70C0964126D66F458E688618E1CD008A0793EBD1@WADPEXV0.waddell.com> <alpine.BSF.2.00.0905062030300.34023@wojtek.tensor.gdynia.pl>
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Sorry. This statement is incorrect. If you aren't using ZFS, or even a GEOM volume with mirror/RAID5/softup/etc, you cannot make the statement that hardware RAID is faster. I learned that 3 years ago. It takes about 30 minutes to mirror 1.5TB on ZFS. Try that on hardware RAID. I did the same with 80 GB SATA drives a couple of years ago. Gmirror killed hardware mirror by 50% When your processor on your hardware RAID card is junk and you have a kickass processor and good chunk of memory on your main system and decent controller that isn't getting maxed, the "hardware RAID is always faster" paradigm walked out the door a few years ago. This does not go for EMC, IBM, Hitachi high-end storage arrays where you write to TBs of RAM Cache. P. ________________________________ From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Gary Gatten <Ggatten@waddell.com> Cc: freebsd-questions@freebsd.org; Benjamin Krueger <benjamin@seattlefenix.net>; Olivier Mueller <om-lists-bsd@omx.ch>; freebsd-performance@freebsd.org; Bill Moran <wmoran@potentialtech.com> Sent: Wednesday, May 6, 2009 2:31:16 PM Subject: RE: filesystem: 12h to delete 32GB of data > It could just be me, but I swear Hardware RAID has been faster for many > many years, especially with RAID5 arrays - or anything that requires maybe with RAID5, but using RAID5 today (huge disk sizes, little sense to save on disk space) instead of RAID1/10 doesn't make much sense, as RAID5 is slow on writes by design _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
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