StoreVirtual 12.7 - very high latencies on the datastores in vCenter

[kwiiiq]

Hello all,

I have recently installed StoreVirtual 12.7 at a customer's site. 

Setup:

2 ESXi hosts

Tiered storage:

-  2x SDD in RAID1

- 6x SAS in RAID 6

2 volumes created in StoreVirtual in a Network RAID - 10

The customer has been complaining about slowness so I checked the monitoring tools in the CMC + vCenter.

In CMC I can see no read + write latencies ( not on a Cluster, storage system, or even volume level ).

In vCenter however I can see huge latency spikes on the Datastores provided by StoreVirtual. Sometimes spikes up to 3000ms. Also, the latencies appear to happen on one ESXi host, so I am beginning to suspect a hardware issue. Maybe the switch port, or the network card where the iSCSI connections are connected in the host. I checked the iLOs of the DL380s but I can see no errors.

Anyone with some ideas?

[Steven Clementi]

Are the iSCSI configurations exactly the same on both hosts?

Are the iSCSI connections configured correctly?

Is your multipathing set correctly on both hosts?

Is/are the Network switch(es) configured correctly?

It could be a switch port, or a cable, would not be the first time I seen that.

[kwiiiq]

Hi Steven, thanks for your quick reply.

Are the iSCSI configurations exactly the same on both hosts?

Are the iSCSI connections configured correctly?

--> I have provided some screenshots of the iSCSI setup in vCenter: 2 vmkernel on each host with teaming on a VMware Standard Switch. These 2 physical NICs are connected to 10Gbit/s ports.

Is your multipathing set correctly on both hosts?

--> When checking the paths on both host, I see the following: all paths on both hosts are always pointing to the same VSA IP: 192.168.10.13 ( see screenshot host1_iSCSIpaths and host2_iSCSIpaths ).

The IP the paths are pointing to, is the VSA that is located on the site where the host has no latencies.

[kwiiiq]

3 more screenshots