From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gregory Leblanc Subject: Re: EIO AP-1680 ATA133 RAID PCI Controller Date: 12 Feb 2003 15:00:26 -0800 Sender: linux-raid-owner@vger.kernel.org Message-ID: <1045090825.12695.34.camel@gregdell> References: <3E493005.4030702@mvista.com> <3E4329CE.5020706@netscape.net> <3E47E248.3080006@mvista.com> <3E48871A.3010709@netscape.net> <3E493005.4030702@mvista.com> <5.1.1.6.2.20030212083307.039a1dd0@mail.harddata.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-mJL3Atx6JQLmYqiB36M4" Return-path: In-Reply-To: <5.1.1.6.2.20030212083307.039a1dd0@mail.harddata.com> To: linux-raid@vger.kernel.org List-Id: linux-raid.ids --=-mJL3Atx6JQLmYqiB36M4 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable It's really impolite to send encrypted mail to the list. Anyone to whom the message is encrypted won't be able to read it On Wed, 2003-02-12 at 07:36, Maurice Hilarius wrote: > -----BEGIN PGP MESSAGE----- [snip] > With regards to your message at 02:16 PM 2/11/03, Gregory Leblanc. > Where you stated: > While the performance of RAID 5 using software RAID is generally far > superior to that provided by hardware RAID, host CPU usage can be > -quite- high in high-load situations. The benchmarks recently posted > had cpu usage numbers at over 90% on most sequeential writes and > reads. > Greg >=20 > Naturally. There is no such thing as a free lunch. > Look at it this way: > If you have X amount of data to write, and it takes half as long, but > uses 30% more CPU, you are ahead of the game.. The formatting of this message is all wonky, sorry about it being confusing. Anyway, I agree, except that I have no numbers to back up the CPU use differences, or the MB/sec differences. Without them, any claims are pretty silly to try to make. Greg --=-mJL3Atx6JQLmYqiB36M4 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQA+StIJnAkVXO6fw4sRAu1bAJ0VPAn8dn33YVSo4zjST/H75n+P2ACaA0HZ g2zfJfm+O06VZx0eOijtKkE= =Cb1S -----END PGP SIGNATURE----- --=-mJL3Atx6JQLmYqiB36M4--