Browse Prior Art Database

A method and mechanism to recover/ restore a deleted virtual instance.

IP.com Disclosure Number: IPCOM000232547D
Publication Date: 2013-Nov-15
Document File: 3 page(s) / 35K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and mechanism of deleting a virtual instance in soft manner, which possibly has the removed virtual instance recovered, and at the same time, the cloud management can dynamically manage the compute resource on demand.

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A method and mechanism to recover / /

Nowadays, in most cases, once a virtual system is deleted , there is no chance to restore it . All related resources, such as disk image, IP address, virtual CPU, virtual memory will be released and recycled back to resource pool for reuse , in cloud flavor.

In case the resource instance is deleted by mistake for whatever reason , an undo action is required to restore / recover the erased resource.

In this disclosure, we will present a method and mechanism of deleting a virtual instance in soft manner , which possibly has the removed virtual instance recovered , and at the same time, the cloud management can dynamically manage the compute resource on demand .

Key word to search: soft delete virtual instance

Prior art:

OpenStack nova soft delete


1.

set reclaim_instance_interval, after the time out, the virtual machine will be deleted . Before the time is up, the virtual machine can be restore from power off (stopped) state.
comparing with our solution , the immediately restore function is less . And for virtual machine level , the solution works. But for virtual instance level, it may not.

We add a new state to virtual instance : isolated state. Before a virtual instance is destroyed , it is isolated first. The virtual instance in isolated state can be restore immediately . When system is lack of CPU , memory and virtual disk resources , the virtual instance can be stopped. It's virtual disk resource will be incremental backup to central place . The ip address is kept. The stopped virtual instance can be started again to provide service with the same ip addresses as before .

Claim points:

Change virtual instance state from running to isolated to softly delete the virtual instance ,


1.

Change virtual instance state from isolated to running to restore immediately the virtual instance


2.

Change virtual instance state from isolated to stopped to save CPU , memory and disk resources


3.

We separate deleted state into 3 states:

Isolated


1.

Stopped


2.

1

restore a deleted virtual instance

restore a deleted virtual instance .



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3.

Destroyed

Isolated state can be transforme...