The past one week have been busy with VMware vSphere 4 and Cisco Nexus 5000 POC and the result is really disappointed. Personally I couldn’t believed and I think I may missed out something. If anyone have any idea or suggestion, please feel free to comment here or post reply at slow Performance with 10 Gb CNA card on vSphere 4 thread.
Benchmark Test Configuration
2 x VMware vSphere 4 hosts
2 x Dell PE2950 Hardware
– Intel(R) Xeon(R) CPU E5410 @ 2.33GHz
– 16GB RAM
– Qlogic QLE8042 10GbE Mercury Converged Network Adapter(CNA) – connected to PCIe 8x slot
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As my previous experienced, if you having a disk space full on /var, the host server will hung and all the VMs on the host will stop functioning. I had my test machine setup as default configuration, which the /var/log only allocated for 2GB in place. Prior to move the system to production, I decide to extend the /var/log from 2GB to 10GB as our current standard. Here come to the idea that I try to extend, unmount and remount as I usually did on the Linux.
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We see the growth in the market to be more aggressive for consolidation in the data center for both physical and virtual server from time to time. There are plenty of solutions in place allow blade to support virtualization today such as virtual connect from HP, pass through module, infiniband integration Xsigo, Cisco UCS and etc. This had significant resolved the I/O interfaces require per blade to host the virtualization host server. CPU and memory per blade and significant increase with the latest release from all the major server vendors, the CPU, memory and disk I/O are no longer the concerns for virutalization.
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You may had experienced the snapshot problem when the snapshot delta virtual disk had become huge which is more than 20GB and is not able to be truncated by removing all the snapshot. Usually the problem occur when the snapshot is no longer available from snapshot manager, but you can see the delta files available from the command prompt or physical folder that contain the Virtual machine images. I experienced the 2nd time now which I am not able to remove the snapshot on a particular virtual machine from snapshot manager and command prompt. The production virtual machine was powered off due to disk full on the specify datastore. This virtual machine contain a previous snapshot which taken 2 weeks before and yet to be truncated. The delta disk had grown up to >20 GB and fully fill up the available space within the data store.
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A virtual network adapter is a program (instead of a physical network adapter) that allows a computer to connect to a network. A virtual network adapter can also be used to connect all the computers on a local area network (LAN) to a larger network such as the Internet or a collection of LANs.
Here, I would like to share how to change virtual machine virtual network adapter manually. In fact, you may know you can add a new virtual adapter and choose the adapter type from drop down menu.
Here you go:
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