In StorageVIEW from VKernel – Part I I introduced you to VKernel StorageVIEW, a free tool which provides you with latency information as indicator of problem with host/datastore pair connected through FC, iSCSI and also NFS for up to five host to datastore links with the greatest latency. That being said let’s have a look at what’s under the hood and how this tool notified me a bottleneck in my home lab I just wasn’t aware of…till now, but now the video!
So as you can see on the video, I used to have (very) high latency with the local datastore of two of my ESXi hosts. A bit of background history here is necessary. Before I bought an Intel SSD X25-M G2 160GB to upgrade my home lab I used to run a couple of my nested ESXi’s on a Lexar 16GB ExpressCard SSD. I did not pay a lot, actually it was a real bargain at my local computer shop but it is also a crappy piece of hardware especially for write operations… I guess you get what you paid for 😦
Anyway, a few hours later after I’ve installed the VKernel StorageVIEW I started to get alerts. Those datastores were not being used to store VMs but nevertheless I decided to move those two nested ESXi’s to my QNAP storage device and since then no more StorageVIEW alerts. Thank you VKernel, I’m a happy man now 🙂
By the way I’m selling a Lexar 16GB ExpressCard SSD, very cheap, anyone interested?