How does a Datastore size can be Measured ?

[SATHISHVIJAY]

How does a Datastore size can be Measured ?

A. Virtual Machine Size

B. Vitual Disk File Size

Please explain the reason with your Answer.

Appreciate for the earlier response. I will post more questions for knowledge sharing ..

[abhilashhb]

Are you asking how to size a datastore or to understand how a datastore size is measured in terms of space consumed, space allocated etc?

[SATHISHVIJAY]

Hi Abhilash,

Thanks for your Response.

They have asked the question like this,

How does Datastore been measured

1. Virtual Machine Size

2. Virtual Machine Disk Size

3. RTO/RPO,

4. IOPS

[Sakkanan]

1. Virtual Machine Size  - It includes Vcpu and Vram

2. Virtual Machine Disk Size - Size of disk in VM

3. RTO/RPO -  Refer the article for more information http://searchstorage.techtarget.com/feature/What-is-the-difference-between-RPO-and-RTO-from-a-backup...

4. IOPS -  Read / write IOPS refer to the number of input /output written / read per second by VM server from disk.

[SATHISHVIJAY]

Hi San, so the answer is ...?

[SATHISHVIJAY]

Can anyone say that, What will be the size of the datastore of the Virtual Machine.

Whether Datastore size = Virtual Machine Size or  Datastore size = Virtual Machine Disk Size

Urgent Pls,...

[SATHISHVIJAY]

Yes Abilash..

Could you please help me.

[hemantgupta]

HI,

There are multiple factors that you need to consider while sizing the datastore .

1- What kind of storage/disk pool have you configured in storage , from which the data LUN will be published ?

2- Have you configured the swap file location for VMs at same place where VMDK are or at other place ?

3- How much is the memory over-commitment on cluster , which will cause memory reclamation ( balooning )  ?

4- Do application in Guest OS is IO intensive ?

5- Are you going to use seperate SCSI controller for different file system in Guest OS ?

6- Have you tweek the queue depth and write session in ESXi ?

7- What density are you planning for VMs on ESXi ?

Hope this could help you !!

[hussainbte]

Datastore is a vmfs volume where you can store one or more virtual machines.

The size of the datastore can be 2 TB and if it contains 'n' number of virtual machine with there own individual sizes.

the sum total should be less that 2 TB.