NetWorker:Azure 虚拟机快照备份失败,因为当前会话已超过服务器并行度

Summary: NetWorker Azure 虚拟机 (VM) 快照备份失败。报告的错误是“当前保存会话已超过 NetWorker 服务器的并行度”

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 虚拟机备份的策略日志中观察到以下错误:

  • Linux: /nsr/logs/policy/POLICY_NAME/WORKFLOW_NAME
  • Windows(默认): 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 服务器的并行度太低。

服务器并行度属性控制服务器同时接受的存储流数量。服务器可以接受的存储流越多,设备和客户端磁盘的运行速度就越快。客户端磁盘可以在其性能极限或它们之间的连接极限运行。服务器并行度不用于控制备份作业的启动,而是用作备份服务器接受的会话的最终限制。服务器并行度值应尽可能高,同时不使备份服务器本身过载。

Resolution

增加 NetWorker 服务器的并行度设置。戴尔支持网站上的《NetWorker 性能优化和规划指南》中详细介绍了服务器并行度。

  1. 在 NetWorker 服务器上打开 管理员 命令提示符或 root shell。
  2. 运行命令 nsradmin
  3. nsradmin 提示符,输入 show parallelism
  4. nsradmin 提示符,输入 print type: nsr
此时将显示 NetWorker 服务器的并行度设置。
  1. 要增加并行度,请输入 update parallelism: new_value

默认服务器并行度为 32,但可以增加到 1024。这些值使用二进制级数,例如 32、64、128、256、512、1024。


提醒:如果您在数据区中计划超过 50 个并发克隆工作流,请确保将服务器并行度值配置为 1024。这是为了避免克隆作保留的流不足。
 
  1. 系统会提示您确认更改,请输入 yyes
  2. 输入 qquit 要退出,请执行以下作: nsradmin

示例:

[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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