PPDM：使用 Data Domain Retention Lock 时，大型数据库的 Microsoft 应用程序代理备份失败

Summary: 使用 Data Domain Retention Lock 时，大型数据库的 Microsoft App Agent 备份失败，并显示错误：“Closing a file failed...， Err：5034-async writeback or commit failure.”

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Symptoms

所有其他数据库都成功完成，但有一个大型数据库在 18 小时后失败。在 SQL 中，我们看到备份进入 100% 完成，但在关闭文件时结束时失败。 
2024-01-18T05:58:32.904Z [TRACE_ID:b0158f733e817c46JOB_ID:8ec0693fe01c6f68]154540 ddbmsqlsv PowerProtect Data Manager info BACKUP database [MTV] TO virtual_device='EMC#8e445e6a-3c22-4ff8-89ec-57965c19b486' WITH name=N'DDBMMSSQL', description=N'SACSQLIDS100A-FULL:MTV', mediadescription=N'5edf1429-59c3-409b-bdb7-9e3634a4d466', maxtransfersize = 4194304, EXPIREDATE=N'2024-02-16T21:55:21' . 20
24-01-19T01:58:17.450Z 38008 ddbmsqlsv PowerProtect Data Manager info Processed 52593328 pages for database 'MTV', file 'MTVPRD' on file 1.
2024-01-19T01:58:20.184Z [TRACE_ID:b0158f733e817c46JOB_ID:8ec0693fe01c6f68]107497 ddbmsqlsv PowerProtect Data Manager info Closing a file failed [5034] ([12752] [8516] Thu Jan 18 17:58:20 2024 ddp_close_file() failed, Err: 5034-async writeback or commit failure ).
2024-01-19T01:58:20.184Z [TRACE_ID:b0158f733e817c46JOB_ID:8ec0693fe01c6f68]38008 ddbmsqlsv PowerProtect Data Manager critical XBSA Internal system error.
2024-01-19T01:58:20.230Z [TRACE_ID:b0158f733e817c46JOB_ID:8ec0693fe01c6f68]172257 ddbmsqlsv PowerProtect Data Manager critical Backup of MTV failed.
2024-01-19T01:58:20.230Z [TRACE_ID:b0158f733e817c46]0 ddbmsqlsv PowerProtect Data Manager info Close agentbus write connection.
2024-01-19T01:58:20.246Z [TRACE_ID:b0158f733e817c46]0 ddbmsqlsv PowerProtect Data Manager info Successfully closed the agentbus write connection. 2024-01-19T01:58:20.246Z [TRACE_ID:b0158f733e817c46]0 ddbmsqlsv PowerProtect Data Manager info Failed databases ================
2024-01-19T01:58:20.246Z [TRACE_ID:b0158f733e817c46]0 ddbmsqlsv PowerProtect Data Manager info MTV
2024-01-19T01:58:20.246Z [TRACE_ID:b0158f733e817c46]0 ddbmsqlsv PowerProtect Data Manager info
2024-01-19T01:58:20.246Z [TRACE_ID:b0158f733e817c46]43709 ddbmsqlsv PowerProtect Data Manager notice Stop time: Thu Jan 18 17:58:20 2024,

Cause

这是因为 Data Domain Retention Lock 延迟设置小于完成备份所需的时间。

保留锁定延迟定义了在应用保留锁定时间段之前修改文件的时间段。可以设置为的最小值为 5 分钟，默认值为 120 分钟。

这会导致备份运行到完成，但如果数据库备份花费的时间超过保留锁定延迟设置，则最后无法写入元数据。例如，默认保留锁定延迟为 12 小时，但备份花费了 18 小时。因此，它无法在最后写入元数据，这就解释了为什么只有大型数据库受到影响。

Resolution

从 Data Domain UI 中，在Data ManagementMTree >>DD Retention Lock下检查。

如果启用，请验证保留锁定延迟的设置值，并将其增大至比最长的数据库备份更长。

或者运行以下命令以检查当前的保留锁定延迟设置。 
mtree retention-lock status mtree

Affected Products

Microsoft App Agent

Products

Data Domain Retention Lock, PowerProtect Software
Article Properties
Article Number: 000221352
Article Type: Solution
Last Modified: 02 Feb 2024
Version:  2
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