This post is more than 5 years old
24 Posts
0
2831
How do Consistency Group (CG) bandwith limitations add up?
If I have 4 CGs, and they are respectively set to 5, 10, 15 & 20Mbps bandwidth limitation via the CLI, would I expect to see usage at up to 50Mbps on initial sync?
The reason I ask is that my colleague setup 4 CGs to replicate about a month ago and it was working OK until last week when our WAN usage went 99% according to Orion monitoring tools. We eventually found that it was the RPAs, and to stop it we turned off the replication of the CGs and the issue was fixed, but we cannot figger out what happened to cause the bandwidth usage to go so high.
The only thing I can think of is that the CGs got so far out of sync, or so much data changed in the CGs that the amount of replication was huge, but I don't know how to find that out.
PS. We don't have compression or dedupe setup yet and we are running RecoverPoint 4.0. The WAN link is 50Mbps max.
forshr
1.1K Posts
0
November 25th, 2015 14:00
The feature is set per RPA via the config_link_policy CLI command.
JulianMilano
24 Posts
0
November 22nd, 2015 20:00
I spoke to a colleague of mine about this who stated the following:
But I don't understand how this could be- aren't the RPAs in a cluster so why would we have to set properties on both nodes of an RPA cluster?
forshr
1.1K Posts
0
November 23rd, 2015 12:00
The feature works as follows:
The system sums bandwidth limitations of all consistency groups on a single RPA and limits the outgoing throughput from the RPA to that sum. If consistency groups with settings of ‘limited’ and ‘unlimited’ run on the same RPA, the effect is that there is no limit to the outgoing throughput from the RPA.
Regards,
Rich Forshaw
RecoverPoint Corporate Systems Engineering
JulianMilano
24 Posts
0
November 24th, 2015 16:00
Thanks Rich, so when setting the bandwidth values, do I have to set it on both RPAs in the same cluster or do I set it once and it replicates the values to both RPAs?