Local storage - lack of space for the backup snapshot?

Hi all

My apologies if this is an obvious question, but I was wondering if anyone could shed some light on a question I have about our ESXi server.

We run ESXi on a Dell PowerEdge 1950 III with 16 GB Ram and 200 GB RAID 5 15 K RPM SAS for local storage - we do not have a requirement for a SAN, etc. and I understand how 'best practice' implementation of ESXi and that local storage is not recommended.

Our question is:

We are running very low on the amount of local storage on the server and we use a Perl script every night to create a snapshot of a VM only we want to save that copies the original VM on a separate NAS device files. Apart from slow performance, this configuration works well for us. However, during the backup of the file snapshot obviously grew up with changes that are made and once the backup is complete he writes these returns to the original vmdk file (or so I think). Can anyone tell what would happen if we managed to create a snapshot at the beginning of the backup, but the server ran out of space before the backup finishes and commit the change snapshot... it would seriously damage our original server vmdk?

If you would like more information on our installation program please let me know but I would like some advice before embark us on this... Thanks in advance.

Stuart Little

If the volume is running out of space, even if you have an active member of snapshot on a virtual computer it stops running (the VM will crash) and you will not be able to commit the snapshot (free space is needed for this). Always avoid the chance of a filling volume, especially if you are using snapshots, while you probably won't lose data if you handle it properly (move the virtual machine to a volume with storage or free space before attempting to commit the snap) you will have at least virtual machine downtime.

Alex

www.phdvirtual.com

Tags: VMware

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