CentOS - Aug 2012 - iscsi storage, LACP or Multipathing | Migration or rebuild?

Hi,

I do have one iscsi storage with 4 GBit nics of which currently only one
is configured with an ip and which is in productive use by one cent os
6.3 server.

Doing some research brought me to the idea to use some nic bonding or
multipathing for that storage, but multipathing I did about four or five
years ago only once :)

Furthormore I can't find the ultimate answer (may be there is not such)
what will be better for us:

bonding or multipathing.

The storage is used for backup; it's connected to an backupserver which
pulls data from different servers ... may be at the same time or one
after an other. The server uses two bonded nics to the LAN.

My question regarding the setup is, what might be good or better:
bonding or multipathing. We'd like to increase performance and nic
failover if one link breaks.

If multipathing is to be preferred, is it possible to preserve the data
currently saved on the storages ext4?

And googling shows up a lot of different how tos and the redhat doc; but
I din not found one describing a straight forward setup.

So thanks a lot for any suggestion or comments!

	Regards . G?tz

-- 
G?tz Reinicke
IT-Koordinator

Tel. +49 7141 969 82 420
Fax  +49 7141 969 55 420
E-Mail goetz.reinicke at filmakademie.de

Filmakademie Baden-W?rttemberg GmbH
Akademiehof 10
71638 Ludwigsburg
www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016

Vorsitzender des Aufsichtsrats:
J?rgen Walter MdL
Staatssekret?r im Ministerium f?r Wissenschaft,
Forschung und Kunst Baden-W?rttemberg

Gesch?ftsf?hrer:
Prof. Thomas Schadt

Hi G?tz.
I'm running Centos 6.2 on a Proliant DL380 G7 server connected to a HP 
Lefthand P4500
using multipath, and ALB(Adaptive Load Balancing) on the Lefthand box it 
self.

Regarding, multipath vs bonding read this -> 
http://blog.open-e.com/bonding-versus-mpio-explained/

You will need to go through the storage manual for red hat enterprise 6 
and read some chapters
regarding configuring your options/needs for your scenario.

Best regards,

Svavar O - Iceland



-- 


G?tz Reinicke wrote:
> Hi,
>
> I do have one iscsi storage with 4 GBit nics of which currently only one
> is configured with an ip and which is in productive use by one cent os
> 6.3 server.
>
> Doing some research brought me to the idea to use some nic bonding or
> multipathing for that storage, but multipathing I did about four or five
> years ago only once :)
>
> Furthormore I can't find the ultimate answer (may be there is not such)
> what will be better for us:
>
> bonding or multipathing.
>
> The storage is used for backup; it's connected to an backupserver which
> pulls data from different servers ... may be at the same time or one
> after an other. The server uses two bonded nics to the LAN.
>
> My question regarding the setup is, what might be good or better:
> bonding or multipathing. We'd like to increase performance and nic
> failover if one link breaks.
>
> If multipathing is to be preferred, is it possible to preserve the data
> currently saved on the storages ext4?
>
> And googling shows up a lot of different how tos and the redhat doc; but
> I din not found one describing a straight forward setup.
>
> So thanks a lot for any suggestion or comments!
>
> 	Regards . G?tz
>
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> CentOS mailing list
> CentOS at centos.org
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