For those who are fortunate to have an Oracle Exadata Database Machine, may wonder if their Exadata meets the IOPS/MBPS as per the technical specifications. Well with the command CALIBRATE in CellCLI, you can run raw performance tests on the cells’ hard disks and flash drives, enabling you to verify the disk/drive performance:
[root@v1ex1celadm01 ~]# cellcli CellCLI: Release 22.214.171.124.4 - Production on Tue Jun 13 19:02:05 IST 2017 Copyright (c) 2007, 2016, Oracle. All rights reserved. CellCLI> calibrate force; Calibration will take a few minutes... Aggregate random read throughput across all hard disk LUNs: 1823 MBPS Aggregate random read throughput across all flash disk LUNs: 9973 MBPS Aggregate random read IOs per second (IOPS) across all hard disk LUNs: 3002 Calibrating hard disks (read only) ... LUN 0_0 on drive [8:0 ] random read throughput: 152.00 MBPS, and 243 IOPS LUN 0_1 on drive [8:1 ] random read throughput: 157.00 MBPS, and 246 IOPS LUN 0_10 on drive [8:10 ] random read throughput: 161.00 MBPS, and 253 IOPS LUN 0_11 on drive [8:11 ] random read throughput: 157.00 MBPS, and 251 IOPS LUN 0_2 on drive [8:2 ] random read throughput: 157.00 MBPS, and 244 IOPS LUN 0_3 on drive [8:3 ] random read throughput: 158.00 MBPS, and 245 IOPS LUN 0_4 on drive [8:4 ] random read throughput: 156.00 MBPS, and 248 IOPS LUN 0_5 on drive [8:5 ] random read throughput: 161.00 MBPS, and 250 IOPS LUN 0_6 on drive [8:6 ] random read throughput: 159.00 MBPS, and 252 IOPS LUN 0_7 on drive [8:7 ] random read throughput: 158.00 MBPS, and 251 IOPS LUN 0_8 on drive [8:8 ] random read throughput: 157.00 MBPS, and 251 IOPS LUN 0_9 on drive [8:9 ] random read throughput: 159.00 MBPS, and 254 IOPS Calibrating flash disks (read only, note that writes will be significantly slower) ... LUN 1_1 on drive [FLASH_1_1] random read throughput: 2,157.00 MBPS, and 280525 IOPS LUN 2_1 on drive [FLASH_2_1] random read throughput: 2,156.00 MBPS, and 274304 IOPS LUN 4_1 on drive [FLASH_4_1] random read throughput: 2,158.00 MBPS, and 282083 IOPS LUN 5_1 on drive [FLASH_5_1] random read throughput: 2,160.00 MBPS, and 287786 IOPS CALIBRATE results are within an acceptable range. Calibration has finished. CellCLI>
The CALIBRATE FORCE, allows the test to run when CELLSRV is still up, this is acceptable if there is no user workload. It is therefore recommended to not run during normal operations. Without the FORCE, the CELLSRV must be shut down.
PLEASE NOTE: This is a single run on a single storage cell, you will need to run on all storage cells in the Exadata Machine to get the total IOPS/MBPS. You can use dcli to run this across all the cells 🙂
If you found this blog post useful, please like as well as follow me through my various Social Media avenues available on the sidebar and/or subscribe to this oracle blog via WordPress/e-mail.
Zed DBA (Zahid Anwar)