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Let
one of our experienced technical
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and
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Using
New Technologies to Deliver
Storage/Backup Best Practices.
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Introduction
Recent advances in data storage and data protection technology are nothing short of phenomenal. Today, even small businesses can afford solutions approaching 100% up time for their information systems. As storage and backup functionalities evolve, the lines between the two are beginning to blur. This paper covers some of the key features of Cybernetics’ miSAN D Series and V Series product lines and their implementation for best data protection practices.
iSCSI
SAN Storage - miSAN D Series
iSCSI
SAN Storage
Until recently, Direct Attached Storage (DAS) and Network Attached Storage (NAS) solutions were what small to mid-sized businesses could afford to add capacity while a Storage Area Network (SAN), usually connected to a Fibre Channel network, was within reach of only the largest enterprises. With the advent of iSCSI technology, and the introduction of miSAN, it’s now simple and affordable for most organizations to add a true, block level SAN to an Ethernet network and to realize huge benefits in performance and resource utilization. The widespread adoption of Virtual Machines is fueling interest in iSCSI SAN, because virtual servers make virtual storage a necessity.
With Cybernetics’ miSAN D Series, terabytes of highly reliable RAID storage capacity can be allocated across a variety of servers, operating systems, and databases. Full-featured yet surprisingly easy to manage, miSAN is live, block level storage that is fast, efficient, reliable – and affordable.
Snapshot
Backup
The first line of defense in data protection is the snapshot - a time-stamped mount point, providing a mountable version of the volume at a specific point in time. A snapshot can be mounted as a read-only volume, from which files can be recovered, reports can be run, and full backups can be created. If someone accidentally deletes an important file, simply mount a version of the volume prior to the event, and copy the missing file to the live volume. miSAN D Series snapshots are so powerful that even if a virus were to delete every block of data from a volume, the volume could be restored and brought live by rolling back to the snapshot prior to the virus attack.
- When planning to take advantage of snapshot backup, allow at least an equal amount of storage capacity for the snapshot area as the volume it is protecting – in other words, double the total storage capacity.
- Users control the frequency of snapshots, so consider the options carefully. Less frequent snapshot intervals allow for older versions to remain online longer. It is important to note that a snapshot requires the hardware resource to be in tact. If the iSCSI RAID is destroyed, the snapshot protection is useless.
WAN
Synchronization and Replication
A pair of miSAN D Series models can maintain synchronized replication volume pairs, even across a WAN. Even if the original hardware resource is destroyed, data can be fully recovered. This data protection feature capitalizes on snapshot data to replicate deduplicated changed blocks to a remote miSAN iSCSI RAID unit. At the point of snapshot, the most current version of changed blocks are replicated from one volume to its replication pair volume, keeping the volumes perfectly synchronized to the last snapshot mount point. In the event of a catastrophe to the original hardware resource, servers can be redirected to the remote volume for instant access to the data. With the miSAN D Series, local users have snapshot protection against corruption and deletions, as well as a live, remote replica to protect against site catastrophe.
High
Availability
For mission critical applications, the high availability feature of the miSAN D Series is an automated alternative to replication. With a high availability pair, every write is mirrored at the hardware level from the master to the slave. There is a heartbeat between the pair, and if there is a failure in the master, it will automatically fail over to the slave unit. The slave unit becomes the master in an instant. Users will never notice an interruption in operations. IT staff can resolve the problem and fail back to the original master in background. High availability demands high bandwidth between the master and slave, and is thus designed for a LAN environment.
Image
Tape Backup
The miSAN D Series is equipped with a tape backup feature designed to archive volumes for long term storage as well as disaster recovery. Any volume can be archived to a SCSI attached tape drive using the on-board tape backup feature. The miSAN iSCSI SAN storage volume can even be used as a bootable system volume through an IP storage adapter. In this configuration, all data is stored on the miSAN, and the full image tape backup becomes a bare metal recovery solution. To satisfy legal requirements for access to historical data, or just for emergency recovery copies of snapshots no longer stored on disk, there is no better media for long-term preservation of data than tape.
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