7.7.3 CALIBRATE

Purpose

The CALIBRATE command runs raw performance tests on cell disks, enabling you to verify the disk performance before the cell is put online.

Syntax

CALIBRATE [FLASHDISK | HARDDISK | LUN1 [, LUN2]] [FORCE]

Usage Notes

You must be logged on to the cell as the root user to run CALIBRATE.

The FORCE option enables you to run the tests when Cell Server is running. If you do not use the FORCE option, then Cell Server must be shut down. Running CALIBRATE at the same time as a Cell Server process impacts performance.

Use the FLASHDISK option to specify that only flash LUNs be calibrated.

Use the HARDDISK option to specify that only hard disk LUNs be calibrated.

Use the LUNn option to specify a list of LUNs by name be calibrated.

Examples

Example 7-74 Output from CALIBRATE Command with FORCE Option on Oracle Exadata Storage Server

This example shows the output when using CALIBRATE with FORCE option on Oracle Exadata Storage Server.

CellCLI> CALIBRATE FORCE
Calibration will take a few minutes...
Aggregate random read throughput across all hard disk luns: 1604 MBPS
Aggregate random read throughput across all flash disk luns: 4242.9 MBPS
Aggregate random read IOs per second (IOPS) across all hard disk luns: 4927
Aggregate random read IOs per second (IOPS) across all flash disk luns: 148695
Controller read throughput: 1608.05 MBPS
Calibrating hard disks (read only) ...
Lun 0_0  on drive [20:0      ] random read throughput: 153.41 MBPS, and 412 IOPS
Lun 0_1  on drive [20:1      ] random read throughput: 155.38 MBPS, and 407 IOPS
Lun 0_10 on drive [20:10     ] random read throughput: 155.32 MBPS, and 423 IOPS
Lun 0_11 on drive [20:11     ] random read throughput: 151.24 MBPS, and 427 IOPS
Lun 0_2  on drive [20:2      ] random read throughput: 152.70 MBPS, and 422 IOPS
Lun 0_3  on drive [20:3      ] random read throughput: 155.42 MBPS, and 423 IOPS
Lun 0_4  on drive [20:4      ] random read throughput: 153.14 MBPS, and 428 IOPS
Lun 0_5  on drive [20:5      ] random read throughput: 154.06 MBPS, and 424 IOPS
Lun 0_6  on drive [20:6      ] random read throughput: 150.82 MBPS, and 409 IOPS
Lun 0_7  on drive [20:7      ] random read throughput: 154.61 MBPS, and 426 IOPS
Lun 0_8  on drive [20:8      ] random read throughput: 154.46 MBPS, and 424 IOPS
Lun 0_9  on drive [20:9      ] random read throughput: 154.63 MBPS, and 426 IOPS
Calibrating flash disks (read only, note that writes will be significantly slower) ...
Lun 1_0  on drive [[10:0:0:0]] random read throughput: 269.11 MBPS, and 19635 IOPS
Lun 1_1  on drive [[10:0:1:0]] random read throughput: 268.86 MBPS, and 19648 IOPS
Lun 1_2  on drive [[10:0:2:0]] random read throughput: 268.68 MBPS, and 19645 IOPS
Lun 1_3  on drive [[10:0:3:0]] random read throughput: 268.92 MBPS, and 19640 IOPS
Lun 2_0  on drive [[12:0:0:0]] random read throughput: 269.78 MBPS, and 20436 IOPS
Lun 2_1  on drive [[12:0:1:0]] random read throughput: 269.69 MBPS, and 20394 IOPS
Lun 2_2  on drive [[12:0:2:0]] random read throughput: 269.04 MBPS, and 20439 IOPS
Lun 2_3  on drive [[12:0:3:0]] random read throughput: 269.51 MBPS, and 20420 IOPS
Lun 4_0  on drive [[9:0:0:0] ] random read throughput: 269.07 MBPS, and 19668 IOPS
Lun 4_1  on drive [[9:0:1:0] ] random read throughput: 269.24 MBPS, and 19697 IOPS
Lun 4_2  on drive [[9:0:2:0] ] random read throughput: 269.09 MBPS, and 19676 IOPS
Lun 4_3  on drive [[9:0:3:0] ] random read throughput: 269.03 MBPS, and 19681 IOPS
Lun 5_0  on drive [[11:0:0:0]] random read throughput: 268.06 MBPS, and 19714 IOPS
Lun 5_1  on drive [[11:0:1:0]] random read throughput: 268.24 MBPS, and 19696 IOPS
Lun 5_2  on drive [[11:0:2:0]] random read throughput: 268.33 MBPS, and 19717 IOPS
Lun 5_3  on drive [[11:0:3:0]] random read throughput: 268.14 MBPS, and 19693 IOPS
CALIBRATE results are within an acceptable range.
 
CALIBRATE stress test is now running...
Calibration has finished.

Example 7-75 Calibrating LUNs by Name

CALIBRATE '2_1', '2_3' FORCE