This post is more than 5 years old
3 Posts
0
2440
February 2nd, 2016 14:00
Recoverpoint CRR and CDP throttling on VMAX
I have a question about CRR and CDP throttling. I know that there is a bandwidth limit that can be configured per CG. Does that limit the IP bandwidth for CRR or does it limit FC bandwidth also for CDP if going to a different array?
If I am doing CLR and set this bandwidth limit would that slow down the CDP also so that it only runs at the same rate as CRR?
Also, I know you can use config IO throttling to set a limit per array. With a VMAX can I set the limit per director or engine?
No Events found!
forshr
2 Intern
•
1.1K Posts
0
February 3rd, 2016 11:00
Yes it would limit or slow the time it takes for both copies to reach an Active state as a single init stream is used for both copies.
forshr
2 Intern
•
1.1K Posts
1
February 3rd, 2016 02:00
Hi Mike,
Bandwidth limitation is applicable to remote replication only and is currently enabled by default using MPI whereby the limitation is enabled on a per RPA basis in conjunction with every CG running on that RPA.
config_io_throttling relates to the collective read capability of all the RPAs from the storage and for specific arrays if set. So during any init activity the RPAs will be throttled if this is set.
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
m.bennett
3 Posts
0
February 3rd, 2016 06:00
Thanks Rich for the information. If I am doing CLR and have the bandwidth for the CG limited would that limit the initial CDP over FC? My understanding is that CLR is a single read and then in this case two writes, so I would assume that the reads would only occur as fast as CRR can replicate them for the initial sync. Or am I misunderstanding how the CDP works when in a CG that is also doing CRR.
m.bennett
3 Posts
0
February 3rd, 2016 13:00
Thanks for the help.