Re: FW: 20TB Storage System

From: Poul-Henning Kamp (phk_at_phk.freebsd.dk)
Date: 09/02/03

  • Next message: Petri Helenius: "Re: FW: 20TB Storage System" 
    To: "Max Clark" <max.clark@media.net>
Date: Tue, 02 Sep 2003 22:12:30 +0200

    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.
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  • Next message: Petri Helenius: "Re: FW: 20TB Storage System"

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