A LUN is
a logical section of storage
. A LUN can be backed by a single disk or multiple disks. … A datastore is a description VMware uses for an area of storage that virtual machines can reside on.
Is a datastore a LUN?
A LUN is
a logical section of storage
. A LUN can be backed by a single disk or multiple disks. … A datastore is a description VMware uses for an area of storage that virtual machines can reside on.
How big should a datastore be?
For optimal performance, best practice is to increase the number of datastores rather than increase their size. If a standard for the environment has not already been established, the recommended starting size for a VMFS datastore volume is
1 TB
(see Figure 2).
How many virtual machines are in a datastore?
VMware currently supports a maximum of 2,048 powered-on virtual machines per VMFS datastore. However, in most circumstances and environments, a target of
15–25 virtual machines per datastore
is the conservative recommendation.
How do I find my LUN ID for datastore?
- In vSphere, select the host configuration tab, storage.
- Select the Devices View.
- Sort by LUN # and locate the LUN you want to verify.
- Right click the LUN in the Devices list and select “Copy identifier to clipboard”
- Copy the converted string and paste to a work note.
What is the difference between LUN and volume?
A LUN is a
logical volume from the point of view of the storage
. From the client point of view the LUN it is a disc volume that can be partitioned. Volume is a generic term. It means a contiguous storage area.
What is a LUN vSphere?
A LUN is
a logical section of storage
. A LUN can be backed by a single disk or multiple disks. It can also be allocated from a disk pool/volume/aggregate depending on the storage vendor’s terminology. A datastore is a description VMware uses for an area of storage that virtual machines can reside on.
How many VMs is a LUN?
Anywhere from
four to 15 VMs per LUN
is possible, but if you assign more than your infrastructure can handle, disk I/O could be saturated quickly. It’s also important to appropriately size your host resources to meet the expected performance of your VM storage subsystem.
How large can a VMDK be?
The maximum supported VMDK size on an VMFS-5 datastore is increased to
62 TB
. However, the maximum supported VMDK size on VMFS-3 is still 2 TB. The maximum supported size of a VMDK on NFS is the lesser of 62 TB and 1% less than the maximum file size supported by the NFS filesystem.
What is Datastore in VMware?
Datastores in VMware vSphere are
storage containers for files
. They could be located on a local server hard drive or across the network on a SAN. Datastores hide the specifics of each storage device and provide a uniform model for storing virtual machine files.
What is the maximum number of hosts that you can connect to a VDS?
This section helps you configure VMware VDS in a CloudStack deployment. Each vCenter server instance can support up to 128 VDS instances and each VDS instance can manage up to
500 VMware hosts
.
How many virtual machines can a physical ESXi host support?
With VMware ESXi 5. X, we run a maximum of 24 VMs on each node, usually working with about
15 VMs per host
.
How many hard disks can a VM have?
Maximum of
20 virtual disks
presented to a VM.
How do I find my WWN datastore number?
- Connect to ESXi shell either via putty/SSH or DCUI (Direct Console User Interface) / server console.
- Run ‘ls /proc/scsi/’ and check the folder names: …
- Look for a folder like ‘qla2xxx’ – QLogic HBA, ‘lpfc820’ – Emulex HBA, ‘bnx2i” – Brocade HBA;
- Run ‘ls /proc/scsi/qla2xxx’.
What is Esxcli command?
The ESXCLI command set
allows you to run common system administration commands against vSphere systems from an administration server of your choice
. The actual list of commands depends on the system that you are running on. Run esxcli –help for a list of commands on your system.
What is the storage in ESX called?
Storage types at the ESXi logical level
x has the following four main types of datastore:
VMware FileSystem (VMFS) datastores
: All block-based storage must be first formatted with VMFS to transform a block service to a file and folder oriented services. Network FileSystem (NFS) datastores: This is for NAS storage.
