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Version: 1.0 (Latest)

Release Notes 1.0

What's Changed​

ADBC Parquet Export - 2x Faster Performance​

FastBCP now supports ADBC (Arrow Database Connectivity) for Parquet exports via the -C adbc_mssql connector, powered by ArrowTDS.

Performance improvements:

  • 2x faster Parquet generation compared to traditional methods
  • Native columnar data format (Arrow) eliminates conversion overhead
  • Optimized for SQL Server data types

Usage:

fastbcp -S myserver.database.windows.net \
    -d MyDatabase \
    -Q "SELECT * FROM Sales.Orders" \
    -C adbc_mssql \
    --fileoutput "orders.parquet"

See Connection Parameters documentation for more details.

Buffered Cloud Uploads​

New environment variables enable buffered cloud uploads for significantly improved Azure Data Lake Storage and OneLake performance.

New environment variables:

  • FASTBCP_CLOUD_ISBUFFERED: When True, ADLS/OneLake writes are buffered to a local temp file, then uploaded in parallel on stream dispose (azcopy-like pattern). When False, the SDK's OpenWriteAsync streaming upload is used.
  • FASTBCP_TMPPATH: Base directory for temporary files created during buffered cloud uploads. Default: System temp (%TEMP% / $TMPDIR).
  • FASTBCP_CLOUD_MAXUPLOADTHREAD_PER_STREAM: Maximum number of parallel upload threads per cloud stream. Default: 8 if parallelmethod=None, 2 otherwise.

Example:

# Enable buffered uploads for Azure
$env:FASTBCP_CLOUD_ISBUFFERED = "True"
$env:FASTBCP_TMPPATH = "D:\temp\fastbcp"

fastbcp -S myserver -d MyDB -T Sales.Orders `
    --fileoutput "abfss://container@storage.dfs.core.windows.net/orders.parquet"

See the Environment Variables documentation for detailed configuration.

Move to .NET 10​

FastBCP now runs on .NET 10:

  • Performance improvements in runtime and GC
  • Enhanced security and stability
  • Continued long-term support
  • Compatibility: Windows, Linux, macOS (x64, ARM64)

Improved SBOM Generation​

Enhanced Software Bill of Materials (SBOM) generation for better supply chain security and compliance.

SLSA Build Provenance​

Added SLSA (Supply-chain Levels for Software Artifacts) build provenance in CI for enhanced supply chain security and compliance.

Early Cleanup of Temp Files​

When uploading to cloud storage, temporary files are now cleaned up earlier in the process to reduce disk space requirements.

ArrowTDS ARPE.IO Driver​

FastBCP 1.0 includes the ArrowTDS ARPE.IO driver for high-performance ADBC connectivity.

Key features:

  • TDS 7.4 protocol compatibility
  • Native Arrow columnar format support
  • Optimized for SQL Server 2012 and later
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