NetWorker:Azure VM 快照備份因目前工作階段超過伺服器並行度而失敗

Summary: NetWorker Azure 虛擬機器 (VM) 快照備份失敗。報告的錯誤為「目前的儲存工作階段已超過 NetWorker 伺服器的並行度」

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.

Symptoms

在 NetWorker Azure VM 備份的原則記錄中觀察到下列錯誤:

  • Linux: /nsr/logs/policy/POLICY_NAME/WORKFLOW_NAME
  • Windows (預設): C:\Program Files\EMC NetWorker\nsr\logs\policy\POLICY_NAME\WORKFLOW_NAME
nsrazure_save: RESOURCE_GROUP_NAME:VM_NAME:DISK_NAME level=full, 0 KB 00:00:01      0 files
207818:nsrazure_save:Cannot intialize backup. Backup of Saveset: RESOURCE_GROUP_NAME:VM_NAME:DISK_NAME failed with error current save session has exceeded NetWorker server's parallelism.
207824:nsrazure_save:Backup of Saveset: RESOURCE_GROUP_NAME:VM_NAME:DISK_NAME failed.
174908:nsrazure_save:Saving the backup data in the pool 'POOL_NAME'.
206529:nsrazure_save: Unable to set up the direct save with server 'NW_SERVER_NAME'. Be sure network connectivity exists between client 'CLIENT_NAME' and storage node '?' in both directions. Error: current save session has exceeded NetWorker server's parallelism
90018:nsrazure_save: Cannot open a nsrazure_save session with NetWorker server 'NW_SERVER_NAME': current save session has exceeded NetWorker server's parallelism

Cause

NetWorker 伺服器的並行度太低。

伺服器並行性屬性控制伺服器同時接受的保存流數。伺服器可以接受的保存流越多,設備和用戶端磁碟的運行速度就越快。用戶端磁碟可以在其性能限制或它們之間的連接限制下運行。伺服器並行性不用於控制備份作業的啟動,而是作為備份伺服器接受的會話的最終限制。伺服器並行度值應盡可能高,同時避免備份伺服器本身過載。

Resolution

增加 NetWorker 伺服器的並行度設定。Dell 支援上的 NetWorker 效能最佳化和規劃指南中詳細介紹了伺服器並行性。

  1. 在 NetWorker 伺服器上開啟 系統管理員 命令提示字元或根命令殼層。
  2. 執行命令 nsradmin)
  3. nsradmin 提示,輸入 show parallelism)
  4. nsradmin 提示,輸入 print type: nsr
NetWorker 伺服器的平行度設定隨即顯示。
  1. 若要增加平行度,請輸入 update parallelism: new_value

默認伺服器並行度為 32,但可以增加到 1024。這些值使用二進位級數,例如 32、64、128、256、512、1024。


注意:如果在數據區域中計劃超過 50 個併發克隆工作流,請確保將伺服器並行度值配置為 1024。這是為了避免克隆操作保留的流耗盡。
 
  1. 系統會提示您確認變更,輸入 yyes)
  2. Enter qquit 若要離開 nsradmin)

範例:

[root@nsr ~]# nsradmin
NetWorker administration program.
Use the "help" command for help, "visual" for full-screen mode.
nsradmin> show parallelism
nsradmin> print type: nsr
                 parallelism: 32;
nsradmin> update parallelism: 1024
                 parallelism: 1024;
Update? y
updated resource id 3.0.10.33.0.0.0.0.251.130.220.103.192.168.9.150(75)
nsradmin> print
                 parallelism: 1024;
nsradmin> q

Affected Products

NetWorker

Products

NetWorker Family
Article Properties
Article Number: 000358771
Article Type: Solution
Last Modified: 02 Oct 2025
Version:  2
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