Hi Rob,
Do i understand you right, that there is no performance boost in case
of multipathing EDEV, only failover?
In Linux, we have both, am i corect?
Thank you.
WBR, Sergey
Rob van der Heij <rvdh...@gmail.com>
Sent by: Linux on 390 Port <LINUX-390@VM.MARIST.EDU>
28-04-15 17:49
Please respond to Linux on 390 Port
To: LINUX-390@VM.MARIST.EDU,
cc:
Subject: Re: VM EDEVICE multipath for Linux
On 28 April 2015 at 16:38, Sergey Korzhevsky <s_korzhev...@iba.by> wrote:
Any idea why " The Virtualization Cookbook for IBM z/VM 6.3, RHEL 6.4, and
> SLES 11 SP3" (latest, i think) does not mention this setup?
> Maybe there some hidden problems?
>
>
One of the challenges is performance, since there's only one I/O at a time
on an EDEV disk. If you're doing very large disks, that can get a
bottleneck. Some installations use EDEV for the operating system and the
application code (to simplify provisioning) and use native FCP for the
application data (if any).
Rob
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