ADF copy activity - reading from source too slow

Serban 0 Reputation points

I have an ADF pipeline that copies tables from an on-prmemise SQL Server to Azure SQL Db. The problem is that throughput when running the copy activity will always be ~5MB/s. I tried using increased DIU, partitioning, parallelism and increasing VM size to improve the throughput. This did decrease writing to sink time (to azure sql) but not reading from source (on-premise sql). An azure integration runtime is used for this setup, together with an azure VM for network forwarding, as described here. The on premise database is able to return data much faster in SSMS and if querying from an azure function.

Azure Data Factory
Azure Data Factory
An Azure service for ingesting, preparing, and transforming data at scale.
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  1. ShaikMaheer-MSFT 38,301 Reputation points Microsoft Employee

    Hi Serban,

    Thank you for posting query in Microsoft Q&A Platform.

    I feel using Self hosted IR from on-prem network helps in this case. Kindly try that option.

    Hope this helps. Please let me know how it goes.

    Please consider hitting Accept Answer button. Accepted answers help community as well.