Technical data

Solution Technology Overview
VMware Horizon View 5.3 and VMware vSphere for up to 2,000 Virtual
Desktops Enabled by Brocade Network Fabrics, EMC VNX, and EMC Next-
Generation Backup
43
 Application Protection Suite—Automates application copies and
proves compliance.
 Security and Compliance Suite—Keeps data safe from changes,
deletions, and malicious activity.
Software packs available
 Total Efficiency Pack—Includes all five software suites.
 Total Protection Pack—Includes local, remote, and application
protection suites.
VNX Snapshots is a software feature that creates point-in-time data copies.
You can use VNX Snapshots for data backups, software development and
testing, repurposing, data validation, and local rapid restores. VNX
Snapshots improves on the existing EMC VNX SnapView™ snapshot
functionality by integrating with storage pools.
Note: LUNs created on physical RAID groups, also called RAID LUNs,
support only SnapView snapshots. This limitation exists because VNX
Snapshots requires pool space as part of its technology.
VNX Snapshots supports 256 writeable snapshots per pool LUN. It supports
branching (also called ‘snap of a snap’), as long as the total number of
snapshots for any primary LUN is less than 256.
VNX Snapshots uses redirect on write (ROW) technology. ROW redirects
new writes destined for the primary LUN to a new location in the storage
pool. Such an implementation is different from copy on first write (COFW)
used in SnapView, which holds the write activity to the primary LUN until
the original data is copied to the reserved LUN pool to preserve a
snapshot.
This release also supports consistency groups. You can combine several
pool LUNs into a consistency group and snap them concurrently. When a
snapshot of a consistency group is initiated, all writes to the member LUNs
are held until the snapshots are created. Typically, consistency groups are
used for LUNs that belong to the same application.
EMC VNX SnapSure™ is an EMC VNX Network Server software feature that
enables you to create and manage checkpoints that are point in time,
logical images of a production file system (PFS). SnapSure uses a copy-on-
first-modify principle. A PFS consists of blocks. When a block within the PFS is
modified, a copy containing the block's original contents is saved to a
separate volume called the SavVol.
Subsequent changes made to the same block in the PFS are not copied
into the SavVol. SnapSure reads the original blocks from the PFS in the
SavVol and the unchanged PFS blocks remaining in the PFS according to a
bitmap and block map data-tracking structure. These blocks combine to
provide a complete point-in-time image called a checkpoint.
EMC VNX
Snapshots
EMC VNX
SnapSure