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Operating Systems AIX Filesystem using Oracle and mirroring VG ? Post 302710969 by funksen on Friday 5th of October 2012 07:20:04 AM
Old 10-05-2012
Bakunin is right, this depends on many things
large sequential ios would suffer less from a mirrored disk than a lot of small random ios

you didn't even say what kind of storage it is, local scsi, iscsi, san attached
I'll give you a short answer, because I'm short in time today

if your system is important enough to mirror the volume groups for data safety and to prevent a downtime due to a storage outage, then go for it


I do it this way:
cluster: mirror rootvg, mirror datavgs (mostly over two locations)
non cluster system that boots from san: no mirror at all
non cluster system that boots from local hdisk: mirror rootvg

if I would be using iscsi disks, I would mirror some of the more critical non cluster systems as well, but that's because our ip network is not as stable as our san
Quote:
Originally Posted by filosophizer
. If it indicates high I/O then after mirroring it would be even higher ? right ?
no, you must take a look at increased latency, and decreased overall data throughput in bytes/second

Last edited by funksen; 10-05-2012 at 08:25 AM..
 

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Sys::Filesystem::Cygwin(3pm)				User Contributed Perl Documentation			      Sys::Filesystem::Cygwin(3pm)

NAME
Sys::Filesystem::Cygwin - Return Cygwin filesystem information to Sys::Filesystem SYNOPSIS
See Sys::Filesystem. INHERITANCE
Sys::Filesystem::Cygwin ISA Sys::Filesystem::Unix ISA UNIVERSAL METHODS
version() Return the version of the (sub)module. ATTRIBUTES
The following is a list of filesystem properties which may be queried as methods through the parent Sys::Filesystem object. device Device mounted. mount_point Mount point. fs_vfstype Filesystem type. fs_mntops Mount options. SEE ALSO
<http://cygwin.com/cygwin-ug-net/using.html> VERSION
$Id: Cygwin.pm 128 2010-05-12 13:16:44Z trevor $ AUTHOR
Nicola Worthington <nicolaw@cpan.org> - <http://perlgirl.org.uk> Jens Rehsack <rehsack@cpan.org> - <http://www.rehsack.de/> COPYRIGHT
Copyright 2004,2005,2006 Nicola Worthington. Copyright 2008-2010 Jens Rehsack. This software is licensed under The Apache Software License, Version 2.0. <http://www.apache.org/licenses/LICENSE-2.0> perl v5.10.1 2010-05-18 Sys::Filesystem::Cygwin(3pm)
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