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Data Domain：达到 CIFS 超时后，到 Data Domain 的本机 SQL 备份失败

Summary: 客户端会话超时会重置与 Data Domain 的通信，从而导致备份失败。

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Symptoms

由于意外网络错误，备份到 Data Domain 通用 Internet 文件系统 （CIFS） 共享失败，并显示以下消息：

BackupIoRequest::ReportIoError: write failure on backup device '\\device\share\Database_full_20240316015305.BAK'. Operating system error 59 (An unexpected network error occurred.).
The operating system returned the error '59(An unexpected network error occurred.)' while attempting 'DiskChangeFileSize' on '\\device\share\Database_full_20240316015305.BAK'
The operating system returned the error '59(An unexpected network error occurred.)' while attempting 'FlushFileBuffers' on '\\device\share\Database_full_20240316015305.BAK'.

Cause

默认情况下，Windows 会话超时为 60 秒。此超时不仅取决于 Data Domain 响应时间，还取决于任何网络延迟。如果网络速度较慢或 Data Domain 处理时间超过预期（例如在繁重备份负载下快速扩展索引），Windows 会重置连接，从而导致备份错误。

Resolution

通过运行以下命令，将 Windows 会话超时增加到更高的值，例如 180 秒： 
Set-SmbClientConfiguration -SessionTimeout 180 -Force

Affected Products

Data Domain