NVP vProxy: VM-sikkerhedskopiering sikkerhedskopierer ikke-allokeret diskplads som ændrede data

Summary: Der udføres sikkerhedskopier af NetWorker VMware Protection (NVP) Virtual Machine (VM). Under sikkerhedskopieringer beregnes ikke-allokeret diskplads som ændrede data, og der skrives til Data Domain, hvilket resulterer i langsommere ydeevne for sikkerhedskopiering end forventet. ...

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

En VM har f.eks. følgende diskkonfiguration og -brug:

Disknummer Klargjort Ledig plads
1 149 GB 94 GB
2 14 TB 12,3 TB
3 899 GB 595 GB
4 249 GB 241 GB
5 74 GB 10 GB

Under VM-sikkerhedskopieringer logges følgende i logfilen for VM-sikkerhedskopieringssessionen:

YYYY-MM-DDT22:00:26Z INFO:   [94] Queried CBT data relative to '52 68 e2 45 c1 72 2a 28-60 2b 7c d3 20 2f b1 7c/45', for 'Hard disk 1'.
YYYY-MM-DDT22:00:27Z NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDT22:00:27Z NOTICE: [94] Used bytes = 160410107904, changed bytes = 113753849856, change rate = 070.91%.
YYYY-MM-DDT22:00:27Z INFO:   [94] File block exclusion: No objects to exclude from the backup
YYYY-MM-DDT22:00:29Z NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDT22:00:29Z INFO:   [94] Queried CBT data relative to '52 c5 cb 19 01 05 07 a7-33 ad 3c 83 ed ae 88 f3/45', for 'Hard disk 2'.
YYYY-MM-DDT22:00:29Z NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDT22:00:29Z NOTICE: [94] Used bytes = 15393120845824, changed bytes = 14654092869632, change rate = 095.20%.
YYYY-MM-DDT22:00:29Z INFO:   [94] File block exclusion: No objects to exclude from the backup
YYYY-MM-DDT22:00:29Z NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDT22:00:29Z INFO:   [94] Queried CBT data relative to '52 cd 0c c4 5d e0 d4 23-7a c3 98 f3 cc 1f 45 63/45', for 'Hard disk 3'.
YYYY-MM-DDT22:00:29Z NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDT22:00:29Z NOTICE: [94] Used bytes = 966305775616, changed bytes = 965150244864, change rate = 099.88%.
YYYY-MM-DDT22:00:29Z INFO:   [94] File block exclusion: No objects to exclude from the backup
YYYY-MM-DDT22:00:30Z NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDT22:00:30Z INFO:   [94] Queried CBT data relative to '52 eb e8 e1 8c 3d ea 1d-ff 5d 73 da 9e 91 d0 39/48', for 'Hard disk 4'.
YYYY-MM-DDTHH:MM:SSZ NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDTHH:MM:SSZ NOTICE: [94] Used bytes = 268405047296, changed bytes = 263489847296, change rate = 098.17%.
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] File block exclusion: No objects to exclude from the backup
YYYY-MM-DDTHH:MM:SSZ NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] Queried CBT data relative to '52 f7 ec 4d 6b 8e fb bb-93 5b 29 53 9a 78 6e e0/45', for 'Hard disk 5'.
YYYY-MM-DDTHH:MM:SSZ NOTICE: [94] Blocks were realigned to 0 KB boundary.
YYYY-MM-DDTHH:MM:SSZ NOTICE: [94] Used bytes = 78411005952, changed bytes = 32001884160, change rate = 040.81%.
…
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Disk Label    |  Mode  | Bytes Moved |  Read Rate   |  Write Rate  |     Overhead  |   VDDK Wait   |   Total Time  | VM MORef  | VM Name                       
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: ------------- | ------ | ----------- | ------------ | ------------ | ------------- | ------------- | ------------- | --------- | ------------------------------
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Hard disk 3   | hotadd |     899 GiB |    491 MiB/s |    179 MiB/s |       0:00:17 |        4.4 us |       1:27:52 | vm-11883  | VM_NAME                  
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Hard disk 4   | hotadd |     246 GiB |    559 MiB/s |    238 MiB/s |       0:00:18 |        4.1 us |       0:21:06 | vm-11883  | VM_NAME                  
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Hard disk 1   | hotadd |     106 GiB |    776 MiB/s |    222 MiB/s |       0:00:19 |        4.5 us |       0:10:29 | vm-11883  | VM_NAME                  
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Hard disk 5   | hotadd |      30 GiB |    662 MiB/s |    147 MiB/s |       0:00:19 |        4.5 us |       0:04:12 | vm-11883  | VM_NAME                  
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Hard disk 2   | hotadd |      14 TiB |    604 MiB/s |    252 MiB/s |       0:00:20 |        5.1 us |      16:01:26 | vm-11883  | VM_NAME                  
YYYY-MM-DDTHH:MM:SSZ INFO:   [94] DiskStats: Total         |        |      15 TiB |    596 MiB/s |    245 MiB/s |       0:01:36 |       22.7 us |      18:05:08 | vm-11883  | VM_NAME

 

BEMÆRK: Næsten hele den klargjorte plads på nogle diske beregnes som ændrede bytes, selvom der i nogle tilfælde er mere end 50 % ledig diskplads.

 

Logfilerne for VM-sikkerhedskopieringssessioner kan findes på vProxy under:

  • /opt/emc/vproxy/runtime/logs/recycle/vbackupd/date

 

BEMÆRK: Logfiler til VM-sikkerhedskopieringssessioner kan også findes på NetWorker-serveren. NetWorker-serverlogfilerne er dog underlagt jobsdb retention (72 timer, standard). Det betyder, at sessionslogfilerne fjernes fra serveren 72 timer efter fuldførelsen. vProxy-logfilerne påvirkes ikke af jobsdb retention.

 

  • Linux:/nsr/logs/policy/PolicyName/WorkflowName/
  • Windows: ..\Program Files\EMC NetWorker\nsr\logs\policy\PolicyName\WorkflowName

Cause

Dette problem opstår uden for NetWorker. Trinvise sikkerhedskopieringer beregnes ved hjælp af VMware Change Block Tracking (CBT).

Resolution

Nulstil Change Block Tracking (CBT) for de VM er, der oplever dette problem.

Se VMware-dokumentationen: Resetting Changed Block Tracking for VMware vSphere virtuelle maskiner (2139574) (eksternt link)

Det anbefales at kontakte VMware-support, hvis der er behov for hjælp til denne procedure, og at undersøge eventuelle problemer, der måtte opstå med CBT. 

Additional Information

Du kan få yderligere oplysninger om sikkerhedskopieringsniveauer, og hvordan de vises i NetWorker, under:
NVP vProxy: Forstå VMware VM-sikkerhedskopieringsniveauer vist i NetWorker

Affected Products

NetWorker

Products

NetWorker Family
Article Properties
Article Number: 000202274
Article Type: Solution
Last Modified: 15 يوليو 2026
Version:  4
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.