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Figure 11-2
SSD Cache vs. Auto Tiering
Total storage capacity in auto tiering is a sum of all individual tier capacities whereas in
cache, the cache capacity does not add to the overall slower storage capacity. This is one of
the key differences. In addition, SSD cache affects rapider than auto tiering because auto
tiering will be affected by relocation the data in a period of time. So SSD cache warm-up
timeframe is usually minutes/hours whereas tiering warm-up is usually in days.
Table 11-1
SSD Cache vs. Auto Tiering
SSD Cache
Auto Tiering
Total Capacity
HDD
HDD + SSD
When SSD is Damaged
Pool Works Fine
Pool Fails
Performance
Effective in Short Term
Effective in Long Term
11.2.
Theory of Operation
Auto tiering is the automated progression or demotion of data across different tiers (types)
of storage devices and media. The movement of data takes place in an automated way with
the help of software and is assigned to the ideal storage media according to performance
and capacity requirements. It also includes the ability to define rules and policies that
dictate if and when data can be moved between the tiers, and in many cases provides the
ability to pin data to tiers permanently or for specific periods of time.
Summary of Contents for XCubeSAN XS5224D
Page 71: ...SANOS User Interface 49 nnnnn RPM Power Supply Local PSU n status Reset to Default Yes No...
Page 99: ...System Settings 77 Figure 6 14 System Information...
Page 315: ...Monitoring 293 Figure 13 5 Hardware Monitoring...
Page 327: ...Support and Other Resources 305 Figure 15 1 Download Service Package in the SANOS UI...
Page 331: ...Support and Other Resources 309...
