Qsan XCubeSAN XS5224D, User Manual

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Web Service 4MB (8,192) 2 0
Customization 1MB/2MB/4MB ≥ 1 and ≤ 4 ≥ 0 and ≤ 4
Table 10-4 I/O Type Table for SSD Read-write Cache
I/O Type
Block Size
(Sectors) Populate-on-Read
Threshold Populate-on-Write
Threshold
Database 1MB (2,048) 2 1
File System 2MB (4,096) 2 1
Web Service 4MB (8,192) 2 1
Customization 1MB/2MB/4MB ≥ 1 and ≤ 4 ≥ 1 and ≤ 4
As you can see, there are tradeoffs for increasing or decreasing each parameter.
Understanding the data locality of the application is essential and it can be useful to do
some field testing to see what works best.
10.3. Configure SSD Cache
The SSD Cache provides SSD Cache Pools and SSD Cache Statistics function tabs to
configure and monitor SSD cache. This section will describe the operations of configuring
SSD cache.
Figure 10-10 SSD Cache Function Submenu
10.3.1. Enable SSD Cache License
The SSD cache function is optional. Before using it, you have to enable SSD cache license.
Select the
Update function tab in the Maintenance function submenu, download Request
License file and send to your local sales to obtain a License Key. After getting the license