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Old 04-28-2017, 10:29 AM   #1
lbar
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Registered: Apr 2017
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xen hypervisor san and iscsi


Dear,

actually we have an infrastructure based upon XenServer 7.0
With an external storage (SAN), that mount the SR with (ISCSI).

Some times, we come with network problems.
With that problems, the VMs lost the connection with the SANs, and the filesystem goes to
read only, very quickly.

Multipath is not available at the moment. So we want to rise up the IO timeout so
that a momentary disconnection of SAN does not cause an immediate readonly disk change.

Can you describe how to do that, on a VMs under XEN?

Thank you.
 
Old 04-28-2017, 04:09 PM   #2
jefro
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Hello and welcome to LQ.

I think you should consider fixing the network by some or many steps.

For the most part any VM should start to be diag'ed like any physical machine.

Not sure you described the steps you used to prove why this is happening.

XEN pages have some generic information on stress testing.


Another web page suggested that iscsi can go read only based on not enough space.

You are not running a lun like a nfs disk are you? Multiple users on same lun?
 
  


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