Backup Exec 23 管理指南

调整的适用情况

对于以下情况，可能需要在 o365_settings.conf 文件中调整默认参数。如果新值有效，则可以将其保留以用于后续作业。

此文件的默认路径为：

C:\Program Files\Veritas\Backup Exec\SCFPlugins\O365\o365_settings.conf

在下次备份中选择备份期间受限制的项目。确保在没有其他用户访问邮箱时进行备份。减少请求数并增加重试次数有助于减少错误。

可以减少以下参数：

# Number of threads for enumerating folder items during backup.
Microsoft recommended value. (minimum - 2, maximum - 5) 
#backup_sync_requests = 5

# Number of threads for backing up items.
(minimum - 2, maximum - 15) 
#backup_download_requests = 5

# Number of items to download per request
during backup (minimum - 5, maximum - 100) 
backup_items_per_download_request = 80 

可以增加以下参数：

# Number of retries when requests fail
during backup (minimum - 0, maximum - 10) 
#backup_retries_for_requests = 5

项目可能会失败并显示以下错误：

文件结束或无输入：邮件传输中断或超时（最大接收延迟为 300 秒）（最大发送延迟为 300 秒）。

失败的可能原因：

在与 Exchange Online 服务连接时检查是否存在任何网络问题。更改以下值有助于解决超时错误。

可以减少以下参数：

# Minimum number of items to download per request
to fallback to on network timeout errors
during backup (minimum - 1, maximum - 20) 
#backup_min_items_per_download_request = 5 
# Maximum total size of all items to download
per request during backup (minimum - 1, maximum - 500) 
#backup_max_size_per_download_request_mb = 20 

可以增加以下参数：

# Network send timeout for requests sent
during backup (minimum - 0, maximum - 300) 
#backup_gsoap_send_timeout_secs = 300 
# Network receive timeout for requests sent
during backup (minimum - 0, maximum - 300) 
#backup_gsoap_recv_timeout_secs = 300

对于失败的项目，必须针对要还原的项目有选择地运行还原。要避免任何新还原不会因限制错误而失败，请确保在没有其他用户访问要还原的邮箱时，或这些邮箱没有备份活动时进行还原。

减少请求数并增加重试次数有助于减少错误。

可以减少以下参数：

# Maximum number of items to upload
in a single request during restore (minimum - 1, maximum - 200) 
#restore_max_items_per_upload_batch = 100 
# Maximum total size of all items to upload per request
during restore (minimum - 1, maximum - 50) 
#restore_max_payload_per_batch_mb = 5 
# Number of threads to upload items
during restore (minimum - 1, maximum - 10) 
#restore_max_item_upload_tasks = 3  
# Maximum number of items to verify in a single request
during restore (minimum - 1, maximum - 200) 
#restore_max_items_per_verification_batch = 50 
# Number of threads to verify items
during restore (minimum - 1, maximum - 10) 
#restore_max_item_verification_tasks = 2  

可以增加以下参数：

# Number of retries when requests fail
during restore (minimum - 0, maximum - 10) 
#restore_max_retries = 5

从 Exchange Online 禁用 EWS 限制时，更改以下设置可提高备份速度。

可以增加以下参数

# Number of threads for enumerating folder items during backup.
Microsoft recommended value. (minimum - 2, maximum - 5) 
#backup_sync_requests = 5 
# Number of threads for backing up items. (minimum - 2, maximum - 15) 
#backup_download_requests = 5  
# Number of items to download per request
during backup (minimum - 5, maximum - 100) 
backup_items_per_download_request = 80 
# Maximum total size of all items to download per request
during backup (minimum - 1, maximum - 500) 
#backup_max_size_per_download_request_mb = 20 
# Maximum total size of all items (downloaded and across all
outstanding requests) during backup 
#backup_max_total_items_download_size_mb = 100
(minimum - 10, maximum - 2000)

从 Exchange Online 禁用 EWS 限制时，更改以下设置可提高还原速度。

可以增加以下参数：

# Maximum number of items to upload in a
single request during restore (minimum - 1, maximum - 200) 
#restore_max_items_per_upload_batch = 100 
# Maximum total size of all items to upload per request
during restore (minimum - 1, maximum - 50) 
#restore_max_payload_per_batch_mb = 5 
# Number of threads to upload items during restore
(minimum - 1, maximum - 10) 
#restore_max_item_upload_tasks = 3  
# Maximum number of items to verify in a single request
during restore (minimum - 1, maximum - 200) 
#restore_max_items_per_verification_batch = 50 
# Number of threads to verify items during restore
(minimum - 1, maximum - 10) 
#restore_max_item_verification_tasks = 2