How It works

GV Govindasamy (Nutanix Senior Solutions and Performance Engineer ) has written a series of three blog posts on data locality, I thought I would summarize and share them here. Be the first to reply with a question below. Does data locality really matter? Does data locality matter in HCI Architecture? Data locality is not just about storing new data in local node. It's also about keeping relevant useful data local when needed for low latency access. Read more. Can data locality help scale throughput? X-Ray's throughput-scalability-random-reads and throughput-scalability-sequential-reads tests help answer the following: Can IOPS or throughput rate sustain over time? As number of nodes grow in cluster, can throughput or IOPS scale with it? Read more.

I have windows 2012 r2 VM but I forget the windows administrator password. When I'm trying to reset the password from recovery command line using below command. X:\sources d: cd windows\system32\ren utilman.exe utilman.exe.old copy windows\system32\cmd.exe utilman.exe. Usually above command will work for normal physical windows server , ESXi Guest vm's to reset the local administrator password. ** In nutanix recovery command line I am unable to view my actual OS disk. Is there any way, How can i view my guest VM os disk on recovery mode. ?

Yes. of course. The real answer lies on how these failures are handled in HCI architectures. What happens to the Data Availability during these failures? The questions arise: Does HCI architecture start protecting data as quickly as possible? How smart the architecture is to rebuild the lost data and how long it's going to take? If the rebuild takes longer, this time window is called risky period. Administrator must hope that there is no other failure occurs during this long rebuild window to ensure FTT and RF requirements. Vendors may offer another brute force method of increasing RF / FTT which increases the cost (in the absense of smart architecture). In this video, I have two disk failures simulated with soft disk pulls on Nutanix AOS. This short video can articulate how fast the AOS gets into action to protect the data from subsequent failures and how fast it completes with its truly distributed architecture b

Can you please help me with below questions 1.How prism master/Acropolis master will be elected ? is there any criteria to become a leader ?

Can anybody confirm if the Extent Store size shown in the Nutanix Sizer tool will be equal to the Container Maximum Capacity that can be used by the VMs for data storage? I am designing a 3-node cluster with following Disks 3 * 960 GB SSD 6 * 4 TB HDD Nutanix Sizer shows Extent Store (Assuming RF2) = 9.63 TiB for HDD and 0.64 TiB for SSD The total shown is 10.27. Will this value be the Maximum Capacity available for the Container to be made out of storage pool? As I have observed the Container Maximum Capacity is exactly half of what the Storage Pool Capacity is shown. What will be the Storage Pool Capacity shown for the above mentioned specs and is this value visible in Nutanix Sizer tool/Storage Capacity Calculator?

Hi folks, I want to ask about the details regarding the network connectvity failure and cluster behaviour in such cases. I am mentioning two such scenarios but other scenarios may also be possible. Scenario 1. If one host in the cluster gets completely disconnected from other nodes at network level but host is up and running what will be the cluster behavior and what will happen to the vms running on that particuar host Scenario 2. If all hosts in the cluster get disconnected from each other at network level but hosts and cvms are up and running, what will happen to the vms running on each host.

Hello, with latest AOS (5.10 or newer) it's possible to run multiple hypervisor in same cluster ? For example one cluster with 5 nodes with esxi and 3 nodes with AHV ? Thanks Manuel

Hi all, we are performing a POC and we have a cluster that originallly had about 30 Tib of available space made of SSD+ HDD. Then, to show the customer the performance improvement moving to All Flash we made an inline conversion addind SSD and removing all the HDD and now we have a total available space is about 11 TiB. The storage container has compression enable and the real used capacity is 4,5 Tib. The problem is that most of the VM are thick provisioned and the actual use space is reported at 12 Tib hence above the available capacity. This triggers RED alarms on the Prism console saying that he Data Resiliency is not available. So I have 2 questions: 1) since the actual used capacity is 4,5 Tib what happens in case of a disk failure? 2) how can we manage to eliminate these alarms? Question number 2) is particularly relevant since if we succeed in the POC a

URLs such as insights.nutanix.com *.compute-*.amazonaws.com release-api.nutanix.com ... According to our security team, those URLs are white listed, so they must be down. e.g. "release-api.nutanix.com could not be reached. Please check Name Server and Proxy settings" Thx

Hi All, Does anyone know how to get this View on files? Regards Gavin

I have been trying to remove an existing nfs whitelisted machine through Rest API explorer. API: cluster/nfs_whitelist/{name:.+} I have tried giving the path parameter with different combination of IP/sunbnet mask but all were failed with error message: Specified NFS Whitelist does not exist. Here, machine IP is whitelisted as I can see it in Filesystem whitelists but I am not able to figure out the exact representation of path parameter. If anyone knows, then please tell me. Thanks in advance.

We are designing a Nutainx cluster utilizing a NX-1065-G5 four host block licensed with Prism Pro and Acropolis Ultimate. This will be the production site managing approximately 12 workloads. For the recover site we are looking at building a 3 host Dell cluster. The hypervisor throughout the environment will be AHV. There will be a Cisco metro network solution between these two sites. My question is, what are our options for replication between the two sites? The KB lists solutions for ESXi and Hyper-V, but does not mention AHV configurations. Is this because this is a native solution built into the Prism solution? Thank you for any enlightenment.

Hi Everyone, I am migrating VMs to AHV from XenServer. The process involves Copy XenServer VM Disks to Nutanix Datashare on XenServer Create DISK_IMAGE from the disks copied on Nutanix DataShare The manual process is to create an image in Nutanix using URL nfs://Nutanix Host IP/SR Name/SR UUID/DISK UUID.vhd I am looking to automate this step using Powershell and Nutanix Cmdlets 'New-NTNXImage' Please help me on how can I create a image (source: URL) using powershell So far I have this, code:$URL = "nfs://172.21.92.26/Xen_to_AHV_Migration/f63571ed-3fbf-80ba-f851-31767ad753fc/357527a6-e441-46e9-a680-f05f1af831aa.vhd"New-NTNXImage -Name "xenahvwintst - disk 1" -Annotation "Copied VM xenahvwintst - disk 1" -ImageType DISK_IMAGE -ImageImportSpec $URL I am not sure

Hello, I have questions on SSD pool and ILM mechanism I still did not found answers for after cross reading dozens of web sites and forums. Probably the response is obvious but I feel like I am missing something here and would like to have certainties on these points. So, let's suppose I have a 4 hybrid (1065) node cluster and I am running out of SSD. Q1) Can I technically add an All Flash node in the same cluster container ? Q2) Will the VMs hosted on this specific AF node automatically be all flash VMs (with no ILM and cold tier drain mechanism) ... or will they use the cluster cold storage pool (from other hybrid nodes) ? ===== Regarding the ILM mechanism and different SSD thresold, I (think I) understood that: - data will preferentially be stored on local SSD of each node until it reaches 75% usage - If one node reaches 75% of SSD usage, then ILM will