When you mark a disk as flash disk, VMware primarily tries to use it as a cache for the datastore. Since SSDs are much much faster than hard disks it improves the performance of the datastore. If you mark a hard disk as flash disks VMware tries to use it as a cache, expecting very … Read more
What is the relationship between number of buffers and ring size? They’re related, but independent. The rx “ring” refers to a set of buffers in memory that are used as a queue to pass incoming network packets from the host (hypervisor) to the guest (Windows VM). The memory gets reserved in the guest by the … Read more
VMware actually has a KB article that has this information: To force the balloon driver to release its hold on memory and prevent the guest operating system from using swap space, use one of these options: Set the value of sched.mem.max to the allocated memory or greater. Select the virtual machine’s Resources > Memory > … Read more
In ESXi 5 (and 4.1), this is referred to as “Tech Support Mode.” It’s an explicit option in the ESXi console interface. See the following article from VMWare on how to enter it.
Since device persistence stuff is just getting in the way for these VMs, rip it out: Completely remove the HWADDR and UUID lines from the ifcfg file, and Delete /etc/udev/rules.d/70-persistent-net.rules before cloning That should let the eth0 with a new MAC address actually use the ifcfg-eth0 on initial boot.
http://www.vmware.com/pdf/vmware-tools-cli.pdf Page 13 : Shrinking disks is not allowed under the following circumstances: The virtual machine is hosted on an ESX/ESXi server. ESX/ESXi Server can shrink the size of a virtual disk only when a virtual machine is exported. The space occupied by the virtual disk on the ESX/ESXi server, however, does not change.
This is 2018. Windows is capable of keeping servers synchronized within 2 ms or so, as required by MIFID II Regulations. So, your problem is a non-problem. Our sysadmins using windows NTP to sync time with domain controller. Synchronization of VMs with ESXI host is off. Why? The host can handle this a lot better … Read more
Latency will be one reason. The lag between “disk give me this data I need before I can do anything else” and the time the data gets back will leave the CPU idle for that time. Resources probably do run at 100%, but for very brief periods. An operating system booting will follow the general … Read more
Around ESXi 6.7, the embedded busybox wget finally started to support https. So finally, you can do https downloads in ESXi. Yay! This is from ESXi 6.7 Update 2. [root@ESXi-X9SRI-3F:/tmp] wget https://www.example.org Connecting to www.example.org (93.184.216.34:443) index.html 100% |******************************************************************************************| 1270 0:00:00 ETA [root@ESXi-X9SRI-3F:/tmp] wget –help BusyBox v1.29.3 (2018-11-02 15:37:50 PDT) multi-call binary. Usage: wget [-c|–continue] … Read more
BINGO!!! Alright, here is how this was resolved: I referenced this artice for unmounting the datastore, https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2004605 Step 1: Manually unmount the datastore from the host with this command: esxcli storage filesystem unmount [-u UUID | -l label | -p path ] In my case I just used the label command. Step 2: Verify that … Read more