Date: Tue, 02 Sep 2003 22:12:30 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "Max Clark" <max.clark@media.net> Cc: freebsd-questions@freebsd.org Subject: Re: FW: 20TB Storage System Message-ID: <50921.1062533550@critter.freebsd.dk> In-Reply-To: Your message of "Tue, 02 Sep 2003 13:14:58 PDT." <ILENIMHFIPIBHJLCDEHKEEMIDCAA.max.clark@media.net>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <ILENIMHFIPIBHJLCDEHKEEMIDCAA.max.clark@media.net>, "Max Clark" writ es: >I know adding ccd/vinum to the equation will lower my IO throughput, but the >question is... if I have an external hardware shelf with 3.5TB (16 250GB >drives w/ Raid 5 from hardware) and I put a Raid 0 stripe across 3 of these >shelves what would my expected loss of IO be? The loss will mostly be from latency, but how much is impossible to tell I think. The statistics of this, even with my trusty old Erlang table would still be too uncertain to be of any value. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?50921.1062533550>