Performance Issues Migrating NSF Databases from Domino on iSeries (AS400) with MNE (4380485)

• Customers report that migration throughput decreases significantly when migrating larger NSF databases (size threshold varies).

• Performance issues are observed when end-users simultaneously access the affected databases.

• Other databases on the same Domino server remain unaffected.

• Logs do not explicitly indicate an error but show reduced migration speed.

MNE is designed to access NSF files efficiently only when they are available on a Windows-based file system or through a mechanism optimized for direct access.

• On non-Windows platforms such as iSeries (AS400), direct access to NSF files is not supported.

• If NSF files are accessed over slower mechanisms (e.g., network copies from iSeries), MNE performance and throughput are negatively affected.

• This limitation is documented in the MNE_4.17_PreMigrPlanningGuide.pdf.

To ensure optimal throughput and avoid performance degradation:

1. Copy or replicate source NSF files from iSeries to a Windows-based file system prior to running migrations.

2. Alternatively, connect a disk directly to the MNE server containing the NSF copies for efficient local access.

3. Avoid using network-based access mechanisms from iSeries, as these significantly reduce migration performance.

4. Review current data access methods in your environment and adjust to ensure NSF data is being migrated from a Windows-accessible location.