Database migration is a fundamental aspect of digital curation, particularly for scientific data collections and memory institutions that rely on databases to store their collections catalogs. However, our research has shown that practitioners struggle to find guidance in migrating their data systems. Though there has been some prior research on best practices for database migration, it is scattered throughout different bodies of literature and communities of practice. To begin bringing these disparate best practices together, we are conducting a rigorous literature review. In this poster, we present the results of our review of literature in the LIS and computer science fields regarding the maintenance and migration of research databases and digital collections. We summarize the existing literature about this topic and identify the gaps in knowledge. We identify the channels of publication, primary themes, and topical coverage of the literature. Our initial searches initially yielded a corpus of over 800 items, which, through an initial title and abstract review, has been reduced to about 180 items for full-text review. Once the current body of literature has been further reduced to only the most relevant material, we will conduct a qualitative analysis of the corpus. The poster will present preliminary findings from this review process. We will present data on the channels of publication and topical coverage of this literature, as well as guidelines and best practices present in the existing body of knowledge.