Migration Assessment Scan: Large Lists

Learn how to mitigate issues with Large Lists during migration.

Overview

Lists over 20,000 items have historically caused issues with the migration tooling, making the ability to predict the time it takes to migrate sites that contain a larger list to be problematic.

Data Migration

List data is migrated. However, the larger the list the more unpredictable the migration process has proven. Extremely large lists can result in an extended migration.

Note

Any site that is configured as "No Access" (locked), in SharePoint will be skipped. To see a list of locked site collections see the Locked Sites scan output.

Preparing for Migration

Investigate the large lists and determine the need for this content to be migrated to the target environment.

Post Migration

The migration tooling has built-in validation to ensure all the list items are migrated. You will want to validate the large lists migrated as expected.

Scan Result Reports

LargeLists-detail.csv This scan report provides all lists that have over 20,000 items.

Column Description
SiteId
Unique identifier of the impacted site collection.
SiteURL
URL to the impacted site collection.
SiteOwner
Owner of the site collection.
SiteAdmins
List of people listed as site collection administrators.
SiteSizeInMB
Size of the size collection in megabytes [MB]
NumOfWebs
Number of webs that exist in the site collection.
ContentDBName
Name of the content database hosting the site collection.
ContentDBServerName
SQL Server hosting the content database.
ContentDBSizeInMB
Size of the content database hosting the site collection.
LastContentModifiedDate
Date/Time the site collection had content modified.
TotalItemCount
Total number of items found in the site collection.
Hits
Number of requests logged for the site collection. Relies on data from the usage logging service. If the usage logging service is disabled this row will show N/A.
DistinctUsers
Number of distinct users that have accessed the site collection. Relies on data from the usage logging service. If the usage logging service is disabled this row will show N/A.
DaysOfUsageData
Number of days the usage logging service retains data. This provides context for Hits and DistinctUsers. For example, if this is 14 days, the Hits and DistinctUsers data is for the last 14 days.
WebURL
Url to the subsite that contains the list.
ListTitle
Title of the list.
ListURL
Url to the root folder of the list.
ListItemCount
Number of items in the list.
ListTemplate
Template used when creating the list.
ListType
The type of list configured.
ListCreator
User that created the list.
ItemLastModifiedDate
Date/Time an item was last modified on the list.
ScanID
Unique identifier assigned to a specific execution of the SharePoint Migration Assessment Tool.