In March 2016, the customer reported that alarms indicating high I/O latency were generated for VMware 5.5 on RH5885 V3 servers.
Figure 1-1 Alarms for the TSPIIV1 server
Figure 1-2 Alarms for the TSPIIV3 server
The vmkwarning.log file of VMware contained a large number of logs indicating that the FCP command of the lpfc driver that comes with VMware failed.
Figure 1-3 Logs indicating an FCP command failure
According to the log analysis result, VMware inferred that the lpfc driver that comes with VMware caused the FCP command to fail, which then triggered alarms indicating high I/O latency.
Figure 1-4 Official response from VMware
The customer uses the LPFC driver 10.0.100.1-1vmw, which comes with VMware.
Compatible driver version at the VMware website:
Figure 1-5 VMware driver compatibility information
According to the hardware logs of the three servers returned from the site, the server hardware was normal and no alarm was generated.
Figure 1-6 Server hardware logs
The lpfc driver that comes with VMware caused high I/O latency.
1. Upgrade the LPFC driver to 126.96.36.199.
Driver download link:
2. Upgrade the firmware for the 8G FC card lpe12002.