Chapter 12. Flash Cache 179
12.3.4 Reading data from Flash Cache
When the data is stored in the module, Data ONTAP can check to see whether the data is
there the next time it is needed, as shown in Figure 12-5.
Figure 12-5 Read request with Flash Cache module installed
When the data is there, access to it is far faster than having to go to disk. This process is how
a workload is accelerated, as shown in Figure 12-6.
Figure 12-6 More storage for WAFL extended cache
Need Space in
System Memory?
Read from Disk
Data in Module?
Read from Module
Not in Module?
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