How It works

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?

We are about to buy and 4 node box with 8*16 core processors.  On top we are going to utilize AHV Here we are going to run 2 or 3 Microsoft Operating system only Now what version of microsoft license we need to buy?

Just curious if there is going to be an update to the Move API documentation to explain how we can create a migration plan from ESX to AHV. Currently the only example shown is for AWS to AHV and when we try to substitute that payload with values from ESX it fails. Create plan example is here:http://{{ move-ip-address }}:8082/#/v2api/plans/createplan We’ve tried using this same template to create a plan for ESX, but it seems to choke on the network identification section with a return code of {'ApiVersion': '2.0.0', 'Code': 20512, 'Message': "Invalid Network Mapping for VM 'NX-TEST'. Ensure sufficient user permissions on source environment to fetch network information.", 'State': 'Error'}(we have validate permissions) This appears to be the part of the payload that it doesn’t like:From the AWS example: "Networks": [            {                "SourceID": "vpc-8e1c3de7",                "TargetUUID": "343eaa8f-a251-4ec0-8ede-729c97f7cddc"            } We’ve substituted these AWS specific

A Storage Replication Adapters (SRA) allows VMware Site Recovery Manager (SRM) to integrate with 3rd party storage array technology. Nutanix SRA is one such software module construct that allows SRM to interact with Nutanix clusters. This allows SRM to perform “Array Based Replication” using Nutanix replication, Data Protection and disaster recovery.SRM is an orchestration tool that allows us to perform recovery plans and runbook functionality.  You can set up, test and perform pre and post recovery steps in case of a failover, Set the order in which the VMs come up and decide to change IP address if needed. SRM depends on vCenter and is licensed separately. Before you start, ensure the following. SRM and vCenter versions are compatible. Please visit the VMWare website to confirm compatibility.  AOS SRA and SRM versions are compatible. Please refer to the Nutanix portal Nutanix SRA for SRM compatibility matrix to confirm compatibility. You will need 2 clusters managed by 2 vCenter

Hey guys, newbie to the forum here. I recently setup a ce version of Nutanix in our work lab environment on vsphere. Up until last week I was able to log into the gui, I can still login via putty.When I try to log into the gui now, via xxx.xxx.xxx.xxx:9440/console/#login - I get the above message.I have also had the message "server is not reachable”I did think about trying the install again but thought I would ask the question first and see if anyone else has had the same problem and if so how they got around it?  Thanks in advance.

Hello, Just wondering if there is anything special about running CVM commands via ansible or other non-interactive session tools? The ansible ping module works just fine but when I start using Nutanix specific commands i get errors telling me that "no such file exists." The commands i'm running are "cluster status" and "ncli rsyslog-config get-status" These obviously work in a regular interactive session but not with ansible. Am i missing a path variable declaration or something? Are the commands only available via interactive sessions(if that is even a thing)? Thanks Update: a coworker who is better at linux than I am said that the profile probably isn't loaded the same so I need to fully source all the commands. So right now I'm doing my best to find them and running them that way. So far so good. /home/nutanix/cluster/bin/cluster status

Can anyone explain the function of the command “nodetool -h 0 ring” and also the explanation of its output, because I often see nutanix support using this command, i just curious function this command :D

The new ESXi 7.0  has been released, does the latest version of nutanix 5.15 (LTS) support upgrades?

Memory allocation and distribution on the AHV Hypervisor is always a tricky equation and not very easy or straight forward to calculate.  I decided to dig deep into this aspect, and the findings were quite intricate.I ran the following command from the Acropolis Master and gathered information for Host 10.21.46.243:$ links http:0:2030 Let us refer to the data obtained for this Host on this listing:Host IP: 10.21.46.243CPUs: 88CPUs used: 37.58CPU free: 50.42Memory: 515822 MB say 512 GBMemory used: 261104 MB say 261 GBMemory Reserved: 0 MBMemory free: 254718 MB say 255 GBPlease note that the output we obtain by running # cat /proc/meminfo on the Host hypervisor will show small numbers for MemFree and MemAvailable fields (less than 0.2%of the Total RAM on the Host): [root@NTNX-16SM76360147-A ~]# cat /proc/meminfo | head -3MemTotal:       528210648 kBMemFree:         1891960 kBMemAvailable:    2619508 kB[root@NTNX-16SM76360147-A ~]#This is because Memory allocations are made in advance by

There may be instances where you'll receive the following alert in your environment      "Cassandra on CVM x.x.x.31 is now detached from the ring due to Node was down for a long time. Node detach procedure done by x.x.x.41."   Before understanding the alert, let's first understand what is Cassandra and the ring-structure?    Cassandra stores and manages all of the cluster metadata in a distributed ring-like manner based upon a heavily modified Apache Cassandra. The Paxos algorithm is utilized to enforce strict consistency. This service runs on every node in the cluster. The Cassandra is accessed via an interface called Medusa   To know more about Cassandra and the ring-structure, try going through Nutanix Bible which explains the architecture. .      Cassandra has a feature called auto-ring repair which helps to prevent taking the cluster down due to multiple node failures at different intervals.   The following article lists more information about the alert, auto-repair feature and ho

Hi all, A newbie question. It seems I still have an old crash dump directory on one of my AHV hosts. A ls -lahtr /var/crash shows the single directory from back in April. At the time the issue was resolved, and the faulty DIMM that was causing the issue was replaced. That said, clearly the dump file was not removed. In terms of cleaning this up, is it OK to delete the dump directory within the /var/crash directory and then rerun the ncc health check. Or is there a better method for clearing crash dumps from Nutanix clusters. Many thanks, Rob

The NCC health check idf_db_to_db_sync_heartbeat_status_check verifies the consistency of data replicated from the Source Cluster to the Replica Cluster. IDF is Insights Data Fabric. A DB that contains data about all the entities in the cluster. And it has to be synced between PE and PC. For the purposes of the check, the source cluster is where the check is run from and the replica cluster is the DB instance that is compared against. This check returns a FAIL status when the heartbeat sync time between database on the source cluster and database on the replica cluster crosses a predefined threshold value (10 minutes, by default).  This check is scheduled to run every 5 minutes, by default and will generate an alert after 3 consecutive failures across scheduled intervals   What is the impact? The impact is the data replicated from the source to the replica cluster is not up to date. This could be because some services may not be working as expected.   If this check returns FAIL, verify

Below are the top knowledge base articles for the month of September 2019. KB 4141 - Alert - PowerSupplyDown KB 1540 - What to do when /home partition or /home/nutanix directory is full KB 4519 - NCC Health Check: check_ntp KB 4409 - LCM: (LifeCycle Manager) Troubleshooting Guide KB 4188 - Alert - IPMIError KB 2090 - AHV | Host and Guest Networking KB 4158 - Alert - PhysicalDiskBad KB 3523 - How to create a Phoenix ISO or AHV ISO from a CVM or Foundation VM KB 7077 - Alert - CassandraSSTableHealth KB 2608 - Cluster Health Checks Incorrectly Show Warnings and Failures KB 7503 - G6, G7 platforms with BIOS 41.002 -DIMM Error handling and replacement policy KB 1863 - NCC Health Check: sufficient_disk_space_check KB 3357 - NCC Health Check: ipmi_sel_cecc_check KB 4273 - NCC Health Check: aged_third_party_backup_snapshot_check KB 6937 - Firmware Binary Links for Host Boot device(SATADOM/M.2), HBA(LSI 3008) & SATA Drive devices KB 5731 - NCC - ERR: Identified as CPU inten

Hi Teeam,can any one help me as soon as possible.I have a four node Nutanix cluster in my environment and there is space issue (not enough free space)in the nutanix cluster for that i did some exercise given below,1.some of the vms migrated to the another cluster successfully and there is no issuue with that. so after migrating vms to another cluster and i have deleted the vms in the affected nutanix cluster …. ok still i am unable to see the free space in my clusterHere my question is ..How much time it will take to reclaim the space/seen free space after deleting the vms in nutanix cluster Recycle Bin has been enabled by default in in the cluster and it stores some data so what about Recycle bin means need to disable after deleting the vms or what about it function to reclaim the space in the nutanix cluster.Please explain any one ASAP. Thanks,Ashok. 

Hello, I have a 3 node cluster with RF 2 configured. When All the nodes are up and running I can see Total Cluster resources as below on the Prism Element.CPU - 388 Ghz RAM - 4.5 TB ( 1.5 TB Per Node) Storage - 32.9 TB  Let’s say If 1 node fails, Will my Available Storage size reduce? Please Help me. Also, I don’t understand one thing, I have Total 42 SSD of 1.92 TB = 80.64 TB, But in reality with RF2 why am I getting only 32.9 TB (without any data efficiency options enabled). I should Ideally get 40 TB of usable space. I checked on the storage sizer portal and it said I should get 63 TB. Please guide guys, what am I missing.    

Hi, i want to share NIACtool v2.5 Beta. It can be run on windows operating systems, it is possible to obtain a complete infrastructure report detailing the virtual machines created. Supports ESXi and AHV hypervisors. The result is a fully modifiable Excel document. https://github.com/dlira2

Just a few questions re sequential I/O and the OPLOG versus the Extent Store. If the I/O is deemed sequential in nature, will this always bypass the OPLOG or only when the write operation is larger then 1MB?  Does bypassing the oplog mean that the write will be a lot slower in comparison?  It still hits the SSD so my assumption is that it’s going to be the same. Why does the process of coalescing the writes before sequentially draining them help with performance? I’m interested in why this step is necessary as opposed to just writing directly to the SSD and then replicating out.

If you already have a functioning “Syslog Server” and you would like to forward cluster logs to it, you can follow instructions in:“https://portal.nutanix.com/#/page/docs/details?targetId=Advanced-Admin-AOS-v511:set-rsyslog-config-c.html”However, presently (as of fall of 2019) the activity entities like Alerts/Events/Audits in prism central cannot be redirected to remote syslog servers. This can be changed in future releases of PC and AOS will be reflected in Release notes.  

Is it possible for a single bridge can have multiple bonds? in which usecase it will be applicable? -Jai

The iSCSI Data Services IP address is used to provide iSCSI access to the cluster storage. It is primarily used by Nutanix Volumes, but is also leveraged by other products such as Calm, Leap, Karbon, Objects and Files. This IP address is owned by one CVM of a cluster at a time, with ownership changing among the CVMs as needed to ensure that it is always available. To note, the iSCSI Data Services IP address CVM owner does not necessarily correlate with the CVM that currently maintains Prism service leadership.To find the current CVM acting as the iSCSI Data Services IP address owner, simply obtain the IP address output from all of the CVMs (generally by using the “allssh ifconfig” command) and verify which CVM reports as having this address. To find when a ownership change has occurred, the Stargate service logs from each CVM can be filtered for entries regarding “eth0:2”.You can find more information regarding the iSCSI Data Services IP Address from the Nutanix Volumes Guide along wit

Nutanix customers using AHV as their Hypervisor often run into disk space issues on their cluster and need to evaluate how much disk space is being consumed by each entity.  And one of the more important factors that needs to be considered is how much space is being taken up by each VM.  There needs to be an easy way of running one single command and get a listing of the space consumed by each VM, so that at one glance you can figure out which are the VMs that can be removed from the cluster right away in order to get some space reclamation.  As a bonus I have also included the command string that will add up all these numbers and give you the grand total of how much disk space has been consumed by all these VMs put together.I have come up with the following string manipulation to be able to get those numbers:nutanix@CVM:$ for Q in `acli vm.list | awk '{print $1}'`;do echo -n "$Q "; acli vm.get "$Q" | grep vmdisk_size | awk '{sum+=$2} END {print sum}' | awk '{ byte =$1 /1024/1024/10

Looking to strengthen security of your HCL cluster? Consider keeping only necessary ports open. Following is the list of firewall ports that must be kept open to successfully access the Nutanix cluster. Prism web console: 9440, 80 SSH to both CVM and Hypervisor: 22 Cluster remote support: 80, 8443 vCenter remote console: 443, 902, 903 from both the user host and vCenter vCenter from Prism web console: 443, 80 Citrix MCS: virtual IP, Port 9440 (TCP) Xtract for VMs (Move): ESXi hosts (TCP 443, 902); AHV (TCP and UDP 2049, 111) Following is the list of ports that must be kept open for the 1-Click upgrade. *.compute-*.amazonaws.com:80,443 release-api.nutanix.com:80 ntnx-portal.s3.amazonaws.com and s3*.amazonaws.com Information above is extracted from KB-1478 which also explains what to do when configuring the entire range of IP address for AWS is not acceptable and using FQDN wildcards is not an option supported by the firewall the environment. KB-1202 Lists port number

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. What if Data Locality was not a design choice in Nutanix AOS? What if data locality was not considered in Nutanix AOS architecture like a few other HCI architectures available in the market? Would AOS suffer the same as other ar

I want to Migration VM. Nutanix(AHV) → Another Nutanix(AHV) So. I tried to get the qcow2 file. refs  https://virtualife.pro/export-an-nutanix-ahv-vm/   First I tried executed command “acli vm.list” → succeed :)   The next time executed command “acli vm.get <VM name>” → nothing happend :(   Why?   -- Version Nutanix 5.10.5 LTS NCC 3.7.1.2 LCM 2.1.4139

What is vNUMA?vNUMA (virtual non-uniform memory access) is a memory-access optimization method for VMware virtual machines (VMs) that helps prevent memory-bandwidth bottlenecks.The primary purpose of vNUMA is to give large virtual machines (or wide VMs) the best possible performance. vNUMA helps the wide VMs create multiple vNUMA nodes. Each vNUMA node has virtual CPUs and virtual RAM. Pinning a vNUMA node to a physical NUMA node ensures that virtual CPUs accessing virtual memory can get the expected NUMA behaviorBefore enabling vNUMA on Virtual Machines, see AHV Best Practices Guide.To enable vNUMA on your Virtual Machines, check this guide.