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IntelliSnap Recovery Manager (IRM) - FAQ

What is the difference between clone and snapshot?

Clone

Clone is a full copy of the data from one device to another target device. It may or may not represent the data at the Point-In-Time, but will represent the data at the Point-In-Time when the clone has been split or activated for use. Clones are usually Read-Only until the copy has been completed. However, recent storage arrays now allow Smart Cloning features, whereby a copy may not have fully copied but data may still be access – when the data is asked to be read from the clone target, the read operation is intercepted so that a copy may be done prior to servicing the read operation. Unlike snapshots since clone is a full copy of the production device, reading the data from the clone target device will not affect data and performance on the production device.

clone

Snapshot (Copy-On-Write / Redirect-On-Write)

Snapshot is a Point-In-Time recovery solution, where rather than all the production data having an extra copy, a timestamp is written within the storage array to point to the production device, signifying a basic pointer to the Point-In-Time data, such as versioning:

snapshot_tech

Only when it needs to – such as when the original data on the production device needs to be overwritten – the data will either be copied before the data is overwritten, or some storage arrays will prefer to redirect the new data that needs to be overwritten and is re-linked back to the user as the “current version” of the data.

What agents are supported by IRM?

Agents

Supported Versions

Cluster Support

Notes

File System Agent

  • Windows Server 2003

  • Windows Server 2008

  • Microsoft

  • Non-Microsoft

  • 1.5 GB Recommended for Software

  • 1 GB for log growth

  • 1 GB of temp space for install or upgrade

  • Non-Microsoft Cluster supports VERITAS Cluster and HP Scalable NAS/PolyServe Cluster

Microsoft SQL Server

  • Microsoft SQL Server 2005 Editions

  • Microsoft SQL Server 2008 Editions

  • Microsoft SQL Server 2008 R2 Editions

  • Microsoft SQL Server 2012 Editions

  • Microsoft

  • Non-Microsoft

  • 170 MB minimum of hard disk space for software/ 498 MB recommended

  • 50 MB of additional hard disk space for log file growth

  • 724 MB of temp space required for install or upgrade (where the temp folder resides)

  • Microsoft Cluster supports Geo-Dispersed Cluster

  • Non-Microsoft Cluster supports VERITAS Cluster and HP Scalable NAS/PolyServe Cluster

Microsoft Exchange Server

  • Microsoft Exchange 2007 64-bit Server

  • Microsoft Exchange 2010 64-bit Server

  • Microsoft Exchange 2013 64-bit Server

  • Microsoft Exchange 2016 64-bit Server

  • Microsoft

  • Non-Microsoft

  • 114 MB minimum of hard disk space for software/ 498 MB recommended

  • 50 MB of additional hard disk space for log file growth

  • 726 MB of temp space required for install or upgrade (where the temp folder resides)

  • Microsoft Cluster supports Geo-Dispersed Cluster

  • Non-Microsoft Cluster supports VERITAS Cluster

Virtual Server

VMware vSphere 4 and Up
Offline Mining Support

Agents

Supported Versions

Notes

SharePoint Document

MOSS 2007

WSS v3.0

SharePoint 2010 Foundation

SharePoint Server 2010

Exchange Mailbox

Microsoft Exchange 2007 64-bit Server

Microsoft Exchange 2010 64-bit Server

Microsoft Exchange 2013 64-bit Server

Support is for Mailbox-level recovery for Snapshots of Exchange Database
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