NVP-vProxy：备份失败，并显示“虚拟机备份请求无效”

MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR notice Action backup vmware-vproxy 'backup' has initialized as 'vproxysave job' with job id 2370140 
...
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR notice Saving the backup data in the pool 'Prod VM'. 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR notice Received the media management binding information on the host '[NETWORKER_STORAGE_NODE]'. 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR notice Connected to the nsrmmd process on the host '[NETWORKER_STORAGE_NODE]'. 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR warning Unable to set up the direct save with server '[NETWORKER_STORAGE_NODE]': retry needed. 
...
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR error Unable to process VM '[VM_NAME]': Request timed out before session established.  
...
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR warning Unable to set up the direct save with server '[NETWORKER_STORAGE_NODE]': The VM backup request is not valid.. 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR critical [VM_NAME]: Cannot start session with NetWorker server '[NETWORKER_STORAGE_NODE]': The VM backup request is not valid.. 
...
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrvproxy_save NSR notice Action backup vmware-vproxy 'backup' with job id 2370140 is exiting with status 'failed', exit code 1 

MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrd NSR info Protection Policy Notice: Starting workflow '[POLICY_NAME]/[WORKFLOW_NAME]' 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrd NSR info Protection Policy Notice: Starting action 'backup' for workflow '[POLICY_NAME]/[WORKFLOW_NAME]' 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrd NSR warning current_read_stream (89) reach max_read_stream 50 for DDR '[DATA_DOMAIN]'. 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrd NSR warning current_read_stream (90) reach max_read_stream 50 for DDR '[DATA_DOMAIN]'. 
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrd NSR warning current_read_stream (90) reach max_read_stream 50 for DDR '[DATA_DOMAIN]'. 
...
MM/DD/YYYY HH:MM:SS [NETWORKER_SERVER] nsrd NSR info policy notice: action backup failed

请参阅文章 NetWorker：如何使用 nsr_render_log

在工作流执行期间，NetWorker 存储节点或目标 DD 过载。DD 强制实施最大读取流计数。当前流计数超过此限制时，DD 无法接受新会话。vProxy 备份过程需要存储节点上的直接保存会话。存储节点无法建立会话，因为 DD 报告已达到流限制。备份会在超时之前重试大约一小时。当多个备份工作流针对同一 DD 同时运行时，通常会发生这种情况。传统客户端备份和 VMware 保护工作流争用相同的 DD 读取流。

1. 错开备份计划。调整保护策略计划以在一天中分配负载。将传统客户端工作流与 VMware 保护工作流分离。
2. 查看 DD 流利用率。在峰值备份窗口期间监视 DD 读取流计数。确定哪些工作流重叠且占用的流最多。
3. 减少并发备份会话。降低针对同一 DD 的备份策略的并行度设置。这样可以减少同时流的数量。
4. 跨存储节点分布工作负载。如果有多个存储节点可用，请跨不同的存储节点分发 VMware 和传统客户端备份。
5. 验证 DD 流限制。查看 DD 许可证和配置以了解最大读取流计数。确认限制符合环境要求。