Qsan XS5224D User Manual page 8

9.2.1. Thin Provisioning Architecture ........................................................................ 160
9.2.2. Space Reclamation .......................................................................................... 161
9.3. Configure Thin Provisioning Pools ................................................................................ 161
9.3.1. Create a Thin Provisioning Pool ...................................................................... 162
9.3.2. List Thin Provisioning Pools ............................................................................ 167
9.3.3. Operations on Thin Provisioning Pools .......................................................... 170
9.3.4. Add a Disk Group in a Thin Provisioning Pool ................................................ 173
9.4. Configure Volumes ......................................................................................................... 175
9.4.1. Create a Volume in a Thin Provisioning Pool ................................................. 175
9.4.2. List Volumes and Operations on Volumes ..................................................... 179
9.5. Configure LUN Mappings and Connect by Host Initiator ............................................. 180
10. SSD Cache .......................................................................................................... 181
10.1. Overview .......................................................................................................................... 181
10.2. Theory of Operation ........................................................................................................ 183
10.2.1. System Memory and SSD Cache Capacity ..................................................... 183
10.2.2. SSD Cache Pool Architecture .......................................................................... 184
10.2.3. RAID Level of SSD Cache Pool ........................................................................ 186
10.2.4. Read/Write Cache Cases ................................................................................. 188
10.2.5. Populating the Cache ....................................................................................... 192
10.2.6. SSD Cache Tuning ............................................................................................ 193
10.3. Configure SSD Cache ..................................................................................................... 194
10.3.1. Enable SSD Cache License .............................................................................. 194
10.3.2. Create an SSD Cache Pool .............................................................................. 195
10.3.3. List SSD Cache Pools....................................................................................... 199
10.3.4. Operations on SSD Cache Pools ..................................................................... 202
10.4. Monitor SSD Cache Statistics ........................................................................................ 204
10.5. SSD Cache Notices ......................................................................................................... 207
11. Auto Tiering ........................................................................................................ 208
11.1. Overview .......................................................................................................................... 208
11.1.1. SSD Cache vs. Auto Tiering ............................................................................. 209
11.2. Theory of Operation ........................................................................................................ 210
11.2.1. Auto Tiering Architecture ................................................................................. 211
11.2.2. Hotness Analysis ............................................................................................. 212
11.2.3. Relocation ......................................................................................................... 213
11.2.4. Tiering Policies ................................................................................................. 214
11.3. Configure Auto Tiering Pools ......................................................................................... 216
11.3.1. Enable Auto Tiering License ............................................................................ 216
11.3.2. Create an Auto Tiering Pool ............................................................................ 216
11.3.3. List Auto Tiering Pools..................................................................................... 222
11.3.4. Operations on Auto Tiering Pools ................................................................... 225
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