Hi there!
Is there any way how to investigate very poor reader time in NDMP backup in Commvault?
Quick look at a part of the log suggests slow reader time to be a culprit of the poor backup performance:
|*1292266*|*Perf*|696353| -----------------------------------------------------------------------------------------------------
|*1292266*|*Perf*|696353| Perf-Counter Time(seconds) Size
|*1292266*|*Perf*|696353| -----------------------------------------------------------------------------------------------------
|*1292266*|*Perf*|696353|
|*1292266*|*Perf*|696353| Replicator DashCopy
|*1292266*|*Perf*|696353| |_Buffer allocation............................ - [Samples - 477421] [Avg - 0.000000]
|*1292266*|*Perf*|696353| |_Media Open................................... 20 [Samples - 5] [Avg - 4.000000]
|*1292266*|*Perf*|696353| |_Chunk Recv................................... - [Samples - 2] [Avg - 0.000000]
|*1292266*|*Perf*|696353| |_Reader....................................... 61454 25428386393 [23.68 GB] [1.39 GBPH]
|*1292266*|*Perf*|696353|
|*1292266*|*Perf*|696353| Reader Pipeline Modules[Client]
|*1292266*|*Perf*|696353| |_CVA Wait to received data from reader........ 61478
|*1292266*|*Perf*|696353| |_CVA Buffer allocation........................ -
|*1292266*|*Perf*|696353| |_SDT: Receive Data............................ 61436 25457973968 [23.71 GB] [Samples - 477526] [Avg - 0.128655] [1.39 GBPH]
|*1292266*|*Perf*|696353| |_SDT-Head: CRC32 update....................... 1 25457916432 [23.71 GB] [Samples - 477525] [Avg - 0.000000]
|*1292266*|*Perf*|696353| |_SDT-Head: Network transfer................... 59 25457916432 [23.71 GB] [Samples - 477525] [Avg - 0.000124] [1446.68 GBPH]
|*1292266*|*Perf*|696353|
|*1292266*|*Perf*|696353| Writer Pipeline Modules[MediaAgent]
|*1292266*|*Perf*|696353| |_SDT-Tail: Wait to receive data from source.... 61480 25457973968 [23.71 GB] [Samples - 477526] [Avg - 0.128747] [1.39 GBPH]
|*1292266*|*Perf*|696353| |_SDT-Tail: Writer Tasks....................... 192 25457916432 [23.71 GB] [Samples - 477525] [Avg - 0.000402] [444.55 GBPH]
|*1292266*|*Perf*|696353| |_DSBackup: Update Restart Info.............. 19
|*1292266*|*Perf*|696353| |_DSBackup: Media Write...................... 171 25431692857 [23.69 GB] [498.63 GBPH]