A key component of business continuity strategies is disaster recovery, the restoration of data to applications according to business priority. Many of these business continuance plans are specified to conform to a combination of RTO and RPO. RTO (Recovery Time Objective) refers to the maximum amount of time that data can be unavailable before impacting business integrity, while RPO (Recovery Point Objective) refers to the acceptable level of data loss that does not compromise operations or compliance.
’The number one draw to virtualization is cost reduction... But once they have the virtualization software in place, they begin to realize a range of agility benefits that really aren’t widely considered right now. The ability to grow and shrink a VM, to move a VM, and to use VM technologies for disaster recovery are benefits that are going to be increasingly important as this trend unfolds.’
-Tom Bittman, Vice President, Gartner Research
Disk-based disaster recovery is a far superior to tape-based solutions that assume that the business can survive the hours or days it may take to recover from tape backups.
A disaster recovery solution from Pillar Data and North American Systems enables a solution that provides data replication over long distances or via high latency network connections, allowing you to place your DR site as far away from your primary site as you need. Pillar Data’s File Replicator performs asynchronous copying, and only copies changes made to existing files.
This DR solution is one solution that can manage all file replication, including Windows, Unix, or Linux, in addition to Exchange and SQL Server stores. Automate scheduled “point-in-time” replication procedures, and set QoS policies that will server mission-critical data first and fastest. In addition, this solution can support “one to many” or “many to one” DR replication.
Pillar Data’s DR solution also includes encryption options, including 3DES and AES, in addition to strong authentication between hosts with x.509 digital certificates, and certified delivery for proof of delivery and full audit logging trail.
EMC Celerra/MirrorView - only supports Celerra-to-Celerra (Pillar provides heterogeneous support). This is an expensive application to maintain and support. EMC RepliStor is a Windows-only app.
NetApp w/SnapMirror - only supports NetApp-to-Netapp (Pillar provides support to and from NetApp, EMC, HP, Sun, and IBM).
NSI DoubleTake - No support for Unix, no digital signatures, and doesn't encrypt data during transmission (Pillar Data can an of four levels of encryption, include 3 DES and AES). There is no variable bandwidth throttling, and if disk-based storage is sold with it, you must obtain technical support from 2 sources.