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Veritas NetBackup™ Appliance Capacity Planning and Performance Tuning Guide
Last Published:
2019-06-24
Product(s):
Appliances (3.0)
Platform: NetBackup Appliance OS
- About this Guide
- Section I. Capacity planning
- Section II. Best Practices
- Section III. Performance tuning
- Section IV. Quick reference to Capacity planning and Performance tuning
Using nbperfchk to validate disk performance on NetBackup Appliances
The Nbperfchk command can also be used to test storage write speeds. If disk write speeds fall below 130 MB/s, there may be a potential issue with the underlying storage configuration in the appliance and Technical Support should be contacted to investigate. To test disk write speeds with nbperfchk, specify a path into the appliance storage being tested as the output path (-o argument value) for nbperfchk:
Table: Appliance storage paths
Appliance Storage | Storage Path | Example |
|---|---|---|
52xx MSDP |
| nbperfchk -I zero: -o /disk/nbperfchk.tst -s 64g -syncend |
52xx AdvancedDisk |
| nbperfchk -I zero: -o /advanceddisk/advol/nbperfchk.tst -s 64g -syncend |
Following are example runs of nbperfchk testing writes into MSDP and AdvancedDisk storage: 1) Nbperfchk write test into MSDP:
symmaster-a.Support> Nbperfchk run
Please enter options:
nbperfchk -I zero: -o /disk/nbperfchk.tst -s 64g
-syncend
Statistics log are recorded in nbperfchk_results.log
3448 MB @ 1723.2 MB/sec, 3448 MB @ 1723.2 MB/sec, at 1369103472
9380 MB @ 1875.6 MB/sec, 5932 MB @ 1977.3 MB/sec, at 1369103475
12736 MB @ 1591.3 MB/sec, 3356 MB @ 1117.7 MB/sec, at 1369103478
12736 MB @ 1157.1 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103481
12736 MB @ 909.1 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103484
12736 MB @ 748.6 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103487
12736 MB @ 636.3 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103490
12736 MB @ 553.4 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103493
12736 MB @ 489.5 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103496
12736 MB @ 438.9 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103499
12736 MB @ 397.8 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103502
12736 MB @ 363.7 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103505
12736 MB @ 335.0 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103508
12736 MB @ 310.4 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103511
12736 MB @ 289.3 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103514
12736 MB @ 270.8 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103517
12736 MB @ 254.5 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103520
18182 MB @ 342.8 MB/sec, 5446 MB @ 1815.4 MB/sec, at 1369103523
19936 MB @ 355.8 MB/sec, 1753 MB @ 583.9 MB/sec, at 1369103526
19936 MB @ 337.7 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103529
< output removed for brevity >
59456 MB @ 265.2 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103694
59456 MB @ 261.7 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103697
59456 MB @ 258.3 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103700
63330 MB @ 271.6 MB/sec, 3873 MB @ 1289.9 MB/sec, at 1369103703
Starting file sync to flush buffers...
Sync completed in 19.21 seconds
65536 MB @ 258.2 MB/sec
2) Nbperfchk write test into AdvancedDisk:
symmaster-a.Support> Nbperfchk run
Please enter options:
nbperfchk -I zero: -o /advanceddisk/advol/nbperfchk.tst -s 64g -syncend
Statistics log are recorded in nbperfchk_results.log
3776 MB @ 1886.3 MB/sec, 3776 MB @ 1886.3 MB/sec, at 1369103913
9104 MB @ 1819.1 MB/sec, 5328 MB @ 1774.4 MB/sec, at 1369103916
13036 MB @ 1627.9 MB/sec, 3931 MB @ 1309.2 MB/sec, at 1369103919
13036 MB @ 1183.9 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103922
13036 MB @ 930.2 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103925
13036 MB @ 766.0 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103928
13036 MB @ 651.1 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103931
13036 MB @ 566.2 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103934
13036 MB @ 500.9 MB/sec, 0 MB @ 0.0 MB/sec, at 1369103937
13529 MB @ 270.3 MB/sec, 493 MB @ 164.4 MB/sec, at 1369103961
< output removed for brevity >
59278 MB @ 315.0 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104099
59278 MB @ 310.1 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104102
59278 MB @ 305.3 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104105
59278 MB @ 300.6 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104108
59278 MB @ 296.1 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104111
59278 MB @ 291.7 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104114
59278 MB @ 287.5 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104117
59278 MB @ 283.4 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104120
59278 MB @ 279.4 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104123
59278 MB @ 275.5 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104126
59278 MB @ 271.7 MB/sec, 0 MB @ 0.0 MB/sec, at 1369104129
59614 MB @ 269.5 MB/sec, 336 MB @ 112.1 MB/sec, at 1369104132
63779 MB @ 284.5 MB/sec, 4164 MB @ 1387.7 MB/sec, at 1369104135
Starting file sync to flush buffers...
Sync completed in 18.65 seconds
65536 MB @ 268.4 MB/sec
All three examples show disk write throughput of more than 130 MB/s, which demonstrates good write performance for MSDP and AdvancedDisk storage.