D-Link DSN-626 User Manual - Page 136

Configuration, > Set SSD Caching, Enable, Select Disks

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C * P = I * S *D * T So we can estimate the warm up time, at least. T = (C * P) / (I * S * D) D-Link Document - User Manual The real case may be longer than the estimate time. Here we take an example of the following.  I: 250 IOPS (Random IOPS per HDD)  S: 64KB (Web service)  D: 16 HDDs  C: 480GB (1 SSD)  P: 2 (Populate-on-read threshold) Warm up time T = (480GB * 2) / (250 * 64KB * 16) = 3932.16 seconds = 65.536 minutes Configuration Take an example of enabling SSD caching. 1. After creating a virtual disk, click▼ -> Set SSD Caching of the selected virtual disk. 2. Check Enable box. 3. Select the policy by drop down menu. 4. Click Select Disks button, and then check the SSDs which are provided for SSD caching. 5. Click OK button to enable SSD caching. Copyright@2014 D-Link System, Inc. All Rights Reserved. 136

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D-Link Document – User Manual
C * P = I * S *D * T
So we can estimate the warm up time, at least.
T = (C * P) / (I * S * D)
The real case may be longer than the estimate time. Here we take an example of the following.
I: 250 IOPS (Random IOPS per HDD)
S: 64KB (Web service)
D: 16 HDDs
C: 480GB (1 SSD)
P: 2 (Populate-on-read threshold)
Warm up time T = (480GB * 2) / (250 * 64KB * 16) = 3932.16 seconds = 65.536 minutes
Configuration
Take an example of enabling SSD caching.
1.
After creating a virtual disk, click
▼
-> Set SSD Caching
of the selected virtual disk.
2.
Check
Enable
box.
3.
Select the policy by drop down menu.
4.
Click
Select Disks
button, and then check the SSDs which are provided for SSD caching.
5.
Click
OK
button to enable SSD caching.
136
Copyright@2014 D-Link System, Inc. All Rights Reserved.