XDP

The XtremIO storage system provides "self-healing" double-parity data protection
with a very high efficiency.*
The system requires very little capacity overhead for data protection and metadata
space. It does not require dedicated spare drives for rebuilds. Instead, it leverages
the "hot space" concept, where any free space available in the array can be utilized
for failed drive reconstructions. The system always reserves sufficient distributed
capacity for performing a single rebuild.
XtremIO maintains its performance, even at high capacity utilization, with minimal
capacity overhead. The system does not require mirroring schemes (and their
associated 100% capacity overhead).
XtremIO requires far less reserved capacity for data protection, metadata storage,
snapshots, spare drives and performance, leaving much more space for user data.
This lowers the cost per usable GB.
The XtremIO storage system provides:
• N+1 data protection
• Incredibly low data protection capacity overhead of 8%
• Performance superior to any RAID algorithm (RAID 1, the RAID algorithm that is
most efficient for writes, requires over 60% more writes than XtremIO Data
Protection.)
• Flash endurance superior to any RAID algorithm, due to smaller amount of writes
and even distribution of data
• Automatic rebuild in case of drive failure and faster rebuild times than traditional
RAID algorithms
• Superior robustness with adaptive algorithms that fully protect incoming data,
even when failed drives exist in the system
• Administrative ease through fail-in-place support

XtremIO Data Protection (XDP) is designed to take advantages of flash media specific
properties and XtremIO's content addressable storage architecture.
Benefiting from the fact that it can control where data is stored without any penalty,
XDP achieves high protection levels and low storage overhead, but with better
performance than RAID 1. As an additional benefit, XtremIO Data Protection also
significantly enhances the endurance of the underlying flash media, compared to any
previous RAID algorithm, which is an important consideration for an enterprise flash
array.