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November 19th, 2015 12:00
Bandwidt restrictions and Recover Point 4.0
We are struggling with recover point because it has been over loading our WAN connections as of late. I hear that they removed the bandwidth restriction in 4.0. I am new the EMC arena, and I am looking for some guidance on correcting the issue so recover point won't kill our WAN link.
I read a blog that said you could restrict it in Unisphere via Data Protection / Recover Point / Consistency Group, but in our system I don't have any of those options.
Any help would be appreciated.
Regards,
Dan
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echolaughmk
2 Intern
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522 Posts
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November 21st, 2015 05:00
Hi,
There might be a few ways to help with this issue. Off the bat, you could try to enable both deduplication and/or compression on the CG's to see if that help lessen the amount of data being replicated. After enabling these you can then look at the bandwidth reduction stats to see if this is helping you at all. Note that enabling compression can take a little more overhead from the RPA's just as a heads up to do this processing.
Another option that could be toggled, but would have to be monitored and tested to ensure that changing it doesn't negatively affect any RPO's you might have requirements for against the CGs, is the "priority" setting for each CG on the same RPA (set this for all CGs on the RPA):
Priority Default = Normal
Only relevant for remote replication over the WAN or Fibre Channel, when two
or more consistency groups are using the same Primary RPA.
Select the priority assigned to this consistency group. The priority determines
the amount of bandwidth allocated to this consistency group in relation to all
other consistency groups using the same Primary RPA.
Possible values are: Idle, Low, Normal, High, and Critical
If you have CG's that seem to be the heavy hitters or monopolizing most of the data traffic you could play with setting these to idle or low and see if that alleviates any of your issues without affecting your RPO's as it would effectively rate limit them against the other lower-performing CG's and thus reduce some traffic.
HTH,
-K
forshr
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1.1K Posts
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November 21st, 2015 15:00
I should also add that the best way to control WAN usage is by the use of a dedicated VLAN for RP.
Regards,
Rich Forshaw
Consultant Corporate Systems Engineer - RecoverPoint & VPLEX (EMEA)
Data Protection and Availability Solutions
EMC Europe Limited
Mobile: 44 (0) 7730 781169 44%20(0)%207730%20781169>
E-mail: richard.forshaw@emc.com
Twitter: @rw4shaw
forshr
2 Intern
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1.1K Posts
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November 21st, 2015 15:00
Hi Dan,
It was removed from the UI at 4.0 but remains as an option via the CLI. You will find the relevant information in the RP Admin Guide and CLI Guide.
Regards,
Rich Forshaw
Consultant Corporate Systems Engineer - RecoverPoint & VPLEX (EMEA)
Data Protection and Availability Solutions
EMC Europe Limited
Mobile: 44 (0) 7730 781169 44%20(0)%207730%20781169>
E-mail: richard.forshaw@emc.com
Twitter: @rw4shaw