sauravrohilla
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Re: SRDF help needed

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when you have a single source and single target but spanned across multiple physical ra link..

regards,

Saurabh

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dkakljkml
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Re: SRDF help needed

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Saurabh,

T

Thanks for the reply, I still doubt if one link in a ra port group goes down it will drop the session . Assume we have 4 ports on a ra group, if one port goes bad , I don't think it will the session. I will still continue to replicate through other 3 ports. Correct me if I am wrong

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Re: SRDF help needed

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dkakljkml<https://community.emc.com/people/dkakljkml?et=watches.email.thread> ,

To my knowledge Raid group / pool device will not have an impact on the replication other than the performance issue on the host.

When you said disabling the RDF1 device that means you have disabled it the host, not on the RDF port?

As long as you have one link out of 4 it won’t drop, other than delayed copy cycle and performance. Link drop will take when you fill up your SRDF DSE pool.

Check the values link limbo and Transmit idle values…

Regards,

Periyakaruppan N (Peri),

SAN specialist

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dkakljkml
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Re: SRDF help needed

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Hi Archuperi, thank for the response. So from you reply what scenario do you think enable consistency will help with async mode , specially in the case where we have single source single target

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Re: SRDF help needed

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With single source / single target replication I do not see much difference being whether its consistency or not. We can do the MSC cleanup / apply to make clear data copy at DR.

When we are replicating multiple devices from a host / from many device groups then the RDF consistency would give us the result.

e.g., out of 5 devices from a host / device groups, if one device goes not ready on the RDF link then the RDF consistency would do its best part.

Correct me if I am wrong…. Thank you.

Regards,

Periyakaruppan N (Peri),

SAN specialist

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