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01-20-2016 12:56 PM
01-20-2016 12:56 PM
I have a physical box that is directly connected to the iSCSI network. It has 2 iSCSI NICs. My Nimble has 5 iSCSI +1 Management.
Inside NCM when I connect a new volume, it only connects 8. It seems like there is one on the array side that isn't happy, but I don't have any alerts or other indications to a problem.
My VMware hosts connect and show 10 connections (Each ESXi host has 2 iSCSI connections back to the iSCSI network)
I have another physical box that has 4 iSCSI NICs. The volumes that have been connected for a long time show 20 connections, but the newest one I just added shows 10.
Switch gear is 2 Dell 6024 (not stacked). 4 port port-channel between the 2. All interfaces in the port-channel are up on both switches so I don't suspect issues there.
Where can I investigate this further? Any ideas?
Solved! Go to Solution.
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01-22-2016 08:10 AM
01-22-2016 08:10 AM
Re: Total Connections Seem lower than they have been previously when adding new volume with NCM
Connections can be added and removed by NCM based on latency and workload. If you want a static number of connections to can edit the /etc/ncm/ncm.conf file and set the min and max connections.
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01-25-2016 08:57 AM
01-25-2016 08:57 AM
Re: Total Connections Seem lower than they have been previously when adding new volume with NCM
I'm referring to the NCM on the physical Windows box, not on VMware. The VMware connection count seems fine.
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01-25-2016 09:05 AM
01-25-2016 09:05 AM
SolutionIf your using Nimble connection manager, you can modify the following value for number of connection in Connection Manager:
HKLM\Software\Nimble Storage\Connections
Default is 2, I'd suggest moving that value up slowly as you'll be connecting via the VTIPs on the array with Connection Manager rather then directly to the data IP's. So upping it to 4 should give you one on each connector.
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01-25-2016 09:32 AM
01-25-2016 09:32 AM
Re: Total Connections Seem lower than they have been previously when adding new volume with NCM
Bingo. That was it, max was set to 8. Thanks, Kevin!