What is Delta Migration? Full vs Delta Data Migration

Ugra Narayan PandeyData Security Expert
I am proudly an Indian and Currently working as a Data Security Expert with SysTools.
Data migration can take a long time to process. When you migrate your initial data, your data may be updated as new data sync from the server. This is where incremental or partial migration comes in handy.
Data migration can be divided into two categories: full data migration and delta or incremental migration. Both methods can be applied to any data migration process. The full migration is done much more frequently, while incremental migration is more complicated and time-consuming. However, at the corporate level, businesses often choose the latter.

What is Full Data Migration?

Full data migration or data-only migration consists of migrating all required data from one platform to another while transferring all data at the same time. One advantage is that this is a relatively simple process because developers have to map data between the two databases of the platform and perform one-time data migration.

What is Delta Migration?

The final result of the Delta migration is actually exactly the same as the result of the full migration. Full data migration happens in the background, not on the Live website. At the same time, "flags" are set in the Live database to help us distinguish the massive data migrated in the background from the new data generated by new customers.

Why Companies Prefer Delta Migration?

  • The main reason service providers and businesses use incremental migration is to ensure that data is completed and up-to-date before the team chooses a new platform. When moving 20 TB of data, that won't happen overnight. Based on the amount of data you have, we recommend that you perform a large-scale migration a week or two before the launch date. After the first wave is complete, it is recommended that you enable regular incremental migration (or synchronization) to ensure that all modified files have been migrated.
  • If you want to migrate all changed files without incremental migration, you should consider doing the large-scale migration again, depending on how much data you have, which may take a long time and may not migrate all updates The data is before the online data. Since incremental migration only transfers changed files, the amount of files transferred is relatively small and can usually be transferred in less than an hour. This reduces the time spent waiting for the migration of large data sets and increases the overall adoption rate.


Full data migration or Delta migration? There is no right choice, this is the decision of every company. The main issue to consider is the loss you will suffer during downtime - the greater the loss, the more advisable it is to use Delta migration, even if additional migration costs are incurred due to additional planning and work.
Ugra Narayan PandeyData Security Expert
I am proudly an Indian and Currently working as a Data Security Expert with SysTools.

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