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30 Posts
0
3495
October 17th, 2011 08:00
Networker 762:what is physical client parallelism?
Is this attribute use for vitual machine backup?
I've never seen this attribute ,i've always seen client parallelism on client resource..
What kind of impact can provide a wrong setting of physical client parallelism?
Thx in advance
-Nicola
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AllanW1
334 Posts
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October 19th, 2011 13:00
Hi Nicola,
Yes, it is used for virtual machine backups and was added recently. The purpose is to limit client parallelism on the host, not inside VM.
For example, if you have an ESX running 40 VMs and each VM has client parallelism of 4 (for guest backup), that’s a total of 160 save sessions on a single physical box. Which is not a good idea.
By configuring physical client parallelism, you can limit total number of sessions on that physical system. Also, it does require that the “physical host” be correctly assigned as it cannot know which physical host to count parallelism towards automatically.
Hope this helps.
Allan (and Vlad
)
NicolaZennaro
30 Posts
0
October 19th, 2011 14:00
Any ideas ?
NicolaZennaro
30 Posts
0
October 19th, 2011 16:00
I've found. I've on the same storage node physical tape drives and DDdevices. One DDdevice has target session set to 1. So all the other devices on the storage node is forced to work with target session=1 https://solutions.emc.com/emcsolutionview.asp?id=esg107989