[2319] in SIPB-AFS-requests

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[daemon@ATHENA.MIT.EDU : Re: parallel salvages and multi-partition disks]

daemon@ATHENA.MIT.EDU (jweiss@MIT.EDU)
Fri Mar 1 21:20:01 1996

From: jweiss@MIT.EDU
Date: Fri, 1 Mar 1996 21:19:42 -0500
To: sipb-afsreq@MIT.EDU


Food for thought...

	Jonathon


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[4620]  daemon@ATHENA.MIT.EDU (John Hascall) Info-AFS_Redistribution 02/28/96 23:04 (37 lines)
Subject: Re: parallel salvages and multi-partition disks
To: info-afs@transarc.com
From: john@iastate.edu (John Hascall)
Date: 29 Feb 1996 02:51:08 GMT

Rick Cochran  <rick@msc.cornell.edu> wrote:
}The current behavior of salvage is to parallel up to four salvage
}operations.  This is nice except that there is no way to tell it how
}to avoid salvaging multiple partitions on the same disk
}simultaneously, which is a Bad Thing (tm).
}
}I found someone at Transarc who understood this and entered defect
}#7307 on my problem TR-19712.  If anyone else feels strongly about the
}desirability of a fix for this, please feel free to contact Transarc
}yourself.

    Indeed, the info they need is right there in the fstab and
    vfsck surely already has routines that know how to read it.

A partial workaround is to order your /vicepX names to avoid it
as much as possible:

       Better                  Worse
    /vicepa   rz0a          /vicepa   rz0a
    /vicepb   rz1a          /vicepb   rz0b
    /vicepc   rz2a          /vicepc   rz1a
    /vicepd   rz3a          /vicepd   rz1b
    /vicepe   rz0b          /vicepe   rz2b
    /vicepf   rz1b          /vicepf   rz2b
    /vicepg   rz2b          /vicepg   rz31
    /viceph   rz3b          /viceph   rz3b

John
-- 
John Hascall                ``An ill-chosen word is the fool's messenger.''
Moderator, comp.unix.wizards
Systems Software Engineer, ISU Comp Center + Ames, IA  50011 + 515/294-9551
<a href="http://www.cc.iastate.edu/staff/systems/john/">My Homepage</a>
--[4620]--

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