Balanced Memory Configuration for ESXi Servers

Background ESXi servers are fundamental infrastructure. The underly hardware performance has a butterfly effect on the upper layer virtual machines and applications. Since there is less than 10% performance overhead on the virtualization layer. So it’s valuable to get full performance on the hardware layer. Memory is a big player in hardware performance tuning. Balanced […]

Emulex OneConnect OCe10102 on ESXi 6.0

Please refer to following post for basic troubleshooting of Emulex OneConnect. How to Install Proper Drivers for 3rd Party Network Adapter on ESXi 5.x I have a box uses Emulex OneConnect OCe10102 network adapters. The adapter is quite old and Emulex brand card doesn’t support ESXi 6.0. I upgraded the server to ESXi 6.0 and […]

Troubleshooting Network Performance of Virtual Machine

There are several layers of networking on the virtualization infrastructure. Guest operating system, Virtual Machine, ESXi driver, physical network adapters, RJ45/SFP and network switches…etc. Sometimes it’s hard to say where exactly caused a problem. Especially hardware layer problems. Today I worked on a very interesting case, it may give some ideas to troubleshooting network performance […]

Cannot Complete File Creation Operation When Storage vMotion

Just quick notes. I saw following error  when do storage vMotion. Cannot Complete File Creation Operation. When check /var/log/hostd.log. I saw following errors: 2017-11-28T02:51:04.476Z info hostd[76A80B70] [Originator@6876 sub=Vimsvc.TaskManager opID=459515D4-000040D6-2d-cf-d4-7817 user=vpxuser:contoso\testuser] Task Created : haTask– 2017-11-28T02:51:04.476Z info hostd[772C2B70] [Originator@6876 sub=Libs opID=459515D4-000040D6-2d-cf-d4-7817 user=vpxuser:contoso\testuser] CopyFromEntry: Hostlog_Dump: Hostlog /vmfs/volumes/598700ee-ec 2017-11-28T02:51:04.476Z info hostd[772C2B70] [Originator@6876 sub=Libs opID=459515D4-000040D6-2d-cf-d4-7817 user=vpxuser:contoso\testuser] UUID: 28dbb1b5-a9d8-e311-1061-03300000002d 2017-11-28T02:51:04.476Z […]

Network Problems of Auto Deployed ESXi Host in LAB

I built a simple Auto Deploy environment by vSphere 6.5 on nested environment. I created virtual ESXi hosts on a physical ESXi host to do the testing. The whole configuration was smoothly, I’m impressed Auto Deploy can be implemented in few hours. One thing bothered me was networking. New ESXi hosts cannot get IP addresses […]