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Viktor Yershov
Senior Software Engineer at Spice AI
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Spice v1.11.0-rc.3 (Jan 23, 2026)

· 2 min read
Viktor Yershov
Senior Software Engineer at Spice AI

Announcing the release of Spice v1.11.0-rc.3!

v1.11.0-rc.3 is a patch release that includes improvements to Hash Indexing for Arrow Acceleration and fixes for TLS connections with Flight SQL endpoints.

What's New in v1.11.0-rc.3

Hash Indexing for Arrow Acceleration (experimental)

Arrow-based accelerations now support hash indexing for faster point lookups on equality predicates. Hash indexes provide O(1) average-case lookup performance for columns with high cardinality.

Features:

  • Primary key hash index support
  • Secondary index support for non-primary key columns
  • Composite key support with proper null value handling

Example configuration:

datasets:
- from: postgres:users
name: users
acceleration:
enabled: true
engine: arrow
primary_key: user_id
indexes:
'(tenant_id, user_id)': unique # Composite hash index

For more details, refer to the Hash Index Documentation.

Flight SQL TLS Connection Fixes

TLS Connection Support: Fixed TLS connection issues when using grpc+tls:// scheme with Flight SQL endpoints. Added support for custom CA certificate files via the new flightsql_tls_ca_certificate_file parameter.

Contributors

Breaking Changes

No breaking changes.

Cookbook Updates

No major cookbook updates.

The Spice Cookbook includes 86 recipes to help you get started with Spice quickly and easily.

Upgrading

To upgrade to v1.11.0-rc.3, use one of the following methods:

CLI:

spice upgrade

Homebrew:

brew upgrade spiceai/spiceai/spice

Docker:

Pull the spiceai/spiceai:v1.11.0-rc.3 image:

docker pull spiceai/spiceai:v1.11.0-rc.3

For available tags, see DockerHub.

Helm:

helm repo update
helm upgrade spiceai spiceai/spiceai --version 1.11.0-rc.3

AWS Marketplace:

Spice is available in the AWS Marketplace.

What's Changed

Changelog

  • Hash indexing for Arrow Acceleration by @lukekim in #8924
  • Improve validation and logging for hash indexes @lukekim in #9047
  • Fix TLS connection for grpc+tls:// Flight SQL endpoints and add custom CA certificate support @phillipleblanc in #9073

Spice v1.11.0-rc.2 (Jan 22, 2026)

· 24 min read
Viktor Yershov
Senior Software Engineer at Spice AI

Announcing the release of Spice v1.11.0-rc.2!

v1.11.0-rc.2 is the second release candidate for advanced test of v1.11. It brings Spice Cayenne to Beta status with acceleration snapshots support, a new ScyllaDB Data Connector, upgrades to DataFusion v51, Arrow 57.2, and iceberg-rust v0.8.0. It includes significant improvements to distributed query, caching, and observability.

What's New in v1.11.0-rc.2

Spice Cayenne Accelerator Reaches Beta

Spice Cayenne has been promoted to Beta status with acceleration snapshots support and numerous stability improvements.

Improved Reliability:

  • Fixed timezone database issues in Docker images that caused acceleration panics
  • Resolved FuturesUnordered reentrant drop crashes
  • Fixed memory growth issues related to Vortex metrics allocation
  • Metadata catalog now properly respects cayenne_file_path location
  • Added warnings for unparseable configuration values

Example configuration with snapshots:

datasets:
- from: s3://my-bucket/data.parquet
name: my_dataset
acceleration:
enabled: true
engine: cayenne
mode: file

DataFusion v51 Upgrade

Apache DataFusion has been upgraded to v51, bringing significant performance improvements, new SQL features, and enhanced observability.

DataFusion v51 ClickBench Performance

Performance Improvements:

  • Faster CASE Expression Evaluation: Expressions now short-circuit earlier, reuse partial results, and avoid unnecessary scattering, speeding up common ETL patterns
  • Better Defaults for Remote Parquet Reads: DataFusion now fetches the last 512KB of Parquet files by default, typically avoiding 2 I/O requests per file
  • Faster Parquet Metadata Parsing: Leverages Arrow 57's new thrift metadata parser for up to 4x faster metadata parsing

New SQL Features:

  • SQL Pipe Operators: Support for |> syntax for inline transforms
  • DESCRIBE <query>: Returns the schema of any query without executing it
  • Named Arguments in SQL Functions: PostgreSQL-style param => value syntax for scalar, aggregate, and window functions
  • Decimal32/Decimal64 Support: New Arrow types supported including aggregations like SUM, AVG, and MIN/MAX

Example pipe operator:

SELECT * FROM t
|> WHERE a > 10
|> ORDER BY b
|> LIMIT 5;

Improved Observability:

  • Improved EXPLAIN ANALYZE Metrics: New metrics including output_bytes, selectivity for filters, reduction_factor for aggregates, and detailed timing breakdowns

Arrow 57.2 Upgrade

Spice has been upgraded to Apache Arrow Rust 57.2.0, bringing major performance improvements and new capabilities.

Arrow 57 Parquet Metadata Parsing Performance

Key Features:

  • 4x Faster Parquet Metadata Parsing: A rewritten thrift metadata parser delivers up to 4x faster metadata parsing, especially beneficial for low-latency use cases and files with large amounts of metadata
  • Parquet Variant Support: Experimental support for reading and writing the new Parquet Variant type for semi-structured data, including shredded variant values
  • Parquet Geometry Support: Read and write support for Parquet Geometry types (GEOMETRY and GEOGRAPHY) with GeospatialStatistics
  • New arrow-avro Crate: Efficient conversion between Apache Avro and Arrow RecordBatches with projection pushdown and vectorized execution support

iceberg-rust v0.8.0 Upgrade

Spice has been upgraded to iceberg-rust v0.8.0, bringing improved Iceberg table support.

Key Features:

  • V3 Metadata Support: Full support for Iceberg V3 table metadata format
  • INSERT INTO Partitioned Tables: DataFusion integration now supports inserting data into partitioned Iceberg tables
  • Improved Delete File Handling: Better support for position and equality delete files, including shared delete file loading and caching
  • SQL Catalog Updates: Implement update_table and register_table for SQL catalog
  • S3 Tables Catalog: Implement update_table for S3 Tables catalog
  • Enhanced Arrow Integration: Convert Arrow schema to Iceberg schema with auto-assigned field IDs, _file column support, and Date32 type support

Acceleration Snapshots

Acceleration snapshots enable point-in-time recovery and data versioning for accelerated datasets. Snapshots capture the state of accelerated data at specific points, allowing for fast bootstrap recovery and rollback capabilities.

Key Feature Improvements in v1.11:

  • Flexible Triggers: Configure when snapshots are created based on time intervals or stream batch counts
  • Automatic Compaction: Reduce storage overhead by compacting older snapshots (DuckDB only)
  • Bootstrap Integration: Snapshots can reset cache expiry on load for seamless recovery (DuckDB with Caching refresh mode)
  • Smart Creation Policies: Only create snapshots when data has actually changed

Example configuration:

datasets:
- from: s3://my-bucket/data.parquet
name: my_dataset
acceleration:
enabled: true
engine: cayenne
mode: file
snapshots: enabled
snapshots_trigger: time_interval
snapshots_trigger_threshold: 1h
snapshots_creation_policy: on_changed

Snapshots API and CLI: New API endpoints and CLI commands for managing snapshots programmatically. List, create, and restore snapshots directly from the command line or via HTTP.

For more details, refer to the Acceleration Snapshots Documentation.

ScyllaDB Data Connector

A new data connector for ScyllaDB, the high-performance NoSQL database compatible with Apache Cassandra. Query ScyllaDB tables directly or accelerate them for faster analytics.

Example configuration:

datasets:
- from: scylladb:my_keyspace.my_table
name: scylla_data
acceleration:
enabled: true
engine: duckdb

For more details, refer to the ScyllaDB Data Connector Documentation.

Distributed Query Improvements

mTLS Verification: Cluster communication between scheduler and executors now supports mutual TLS verification for enhanced security.

Credential Propagation: Azure and GCS credentials are now automatically propagated to executors in cluster mode, enabling access to cloud storage across the distributed query cluster.

Improved Resilience:

  • Exponential backoff for scheduler disconnection recovery
  • Increased gRPC message size limit from 16MB to 100MB for large query plans
  • HTTP health endpoint for cluster executors
  • Automatic executor role inference when --scheduler-address is provided

For more details, refer to the Distributed Query Documentation.

Caching Acceleration Mode Improvements

The Caching Acceleration Mode introduced in v1.10.0 has received significant performance optimizations and reliability fixes in this release.

Performance Optimizations:

  • Non-blocking Cache Writes: Cache misses no longer block query responses. Data is written to the cache asynchronously after the query returns, reducing query latency for cache miss scenarios.
  • Batch Cache Writes: Multiple cache entries are now written in batches rather than individually, significantly improving write throughput for high-volume cache operations.

Reliability Fixes:

  • Correct SWR Refresh Behavior: The stale-while-revalidate (SWR) pattern now correctly refreshes only the specific entries that were accessed instead of refreshing all stale rows in the dataset. This prevents unnecessary source queries and reduces load on upstream data sources.
  • Deduplicated Refresh Requests: Fixed an issue where JSON array responses could trigger multiple redundant refresh operations. Refresh requests are now properly deduplicated.
  • Fixed Cache Hit Detection: Resolved an issue where queries that didn't include fetched_at in their projection would always result in cache misses, even when cached data was available.
  • Unfiltered Query Optimization: SELECT * queries without filters now return cached data directly without unnecessary filtering overhead.

For more details, refer to the Caching Acceleration Mode Documentation.

DynamoDB Connector Enhancements

  • Added JSON nesting for DynamoDB Streams
  • Proper batch deletion handling

URL Tables

Query data sources directly via URL in SQL without prior dataset registration. Supports S3, Azure Blob Storage, and HTTP/HTTPS URLs with automatic format detection and partition inference.

Supported Patterns:

  • Single files: SELECT * FROM 's3://bucket/data.parquet'
  • Directories/prefixes: SELECT * FROM 's3://bucket/data/'
  • Glob patterns: SELECT * FROM 's3://bucket/year=*/month=*/data.parquet'

Key Features:

  • Automatic file format detection (Parquet, CSV, JSON, etc.)
  • Hive-style partition inference with filter pushdown
  • Schema inference from files
  • Works with both SQL and DataFrame APIs

Example with hive partitioning:

-- Partitions are automatically inferred from paths
SELECT * FROM 's3://bucket/data/' WHERE year = '2024' AND month = '01'

Enable via spicepod.yml:

runtime:
params:
url_tables: enabled

Cluster Mode Async Query APIs (experimental)

New asynchronous query APIs for long-running queries in cluster mode:

  • /v1/queries endpoint: Submit queries and retrieve results asynchronously
  • Arrow Flight async support: Non-blocking query execution via Arrow Flight protocol

Observability Improvements

Enhanced Dashboards: Updated Grafana and Datadog example dashboards with:

  • Snapshot monitoring widgets
  • Improved accelerated datasets section
  • Renamed ingestion lag charts for clarity

Additional Histogram Buckets: Added more buckets to histogram metrics for better latency distribution visibility.

For more details, refer to the Monitoring Documentation.

Additional Improvements

  • Model Listing: New functionality to list available models across multiple AI providers
  • DuckDB Partitioned Tables: Primary key constraints now supported in partitioned DuckDB table mode
  • Post-refresh Sorting: New on_refresh_sort_columns parameter for DuckDB enables data ordering after writes
  • Improved Install Scripts: Removed jq dependency and improved cross-platform compatibility
  • Better Error Messages: Improved error messaging for bucket UDF arguments and deprecated OpenAI parameters

Contributors

Breaking Changes

No breaking changes.

Cookbook Updates

New ScyllaDB Data Connector Recipe: New recipe demonstrating how to use ScyllaDB Data Connector. See ScyllaDB Data Connector Recipe for details.

New SMB Data Connector Recipe: New recipe demonstrating how to use ScyllaDB Data Connector. See SMB Data Connector Recipe for details.

The Spice Cookbook includes 86 recipes to help you get started with Spice quickly and easily.

Upgrading

To upgrade to v1.11.0-rc.2, use one of the following methods:

CLI:

spice upgrade

Homebrew:

brew upgrade spiceai/spiceai/spice

Docker:

Pull the spiceai/spiceai:v1.11.0-rc.2 image:

docker pull spiceai/spiceai:v1.11.0-rc.2

For available tags, see DockerHub.

Helm:

helm repo update
helm upgrade spiceai spiceai/spiceai

AWS Marketplace:

Spice is available in the AWS Marketplace.

Dependencies

Changelog

Spice v1.9.1 (Nov 24, 2025)

· 7 min read
Viktor Yershov
Senior Software Engineer at Spice AI

Announcing the release of Spice v1.9.1!🔥

v1.9.1 introduces Amazon Bedrock Nova 2 Multimodal embeddings support with high-dimensional vectors up to 3,072 dimensions and purpose-optimized embeddings for semantic search and retrieval operations, DynamoDB timestamp filter pushdown for more efficient append-mode acceleration with configurable time formatting, HTTP Data Connector health probe configuration for improved endpoint validation reliability, and Spice .NET SDK v0.2 with expanded .NET version support and updated gRPC libraries. This release focuses on bug fixes, stability, and performance improvements.

Amazon Bedrock Nova 2 Multimodal embeddings

Spice now supports the Amazon Nova 2 Multimodal embeddings models via the Bedrock models provider, enabling high-quality text embeddings for semantic search and vector similarity operations. The Nova embeddings model offers configurable dimensions and advanced features like truncation modes and embedding purpose optimization.

Key Features:

  • High-Dimensional Embeddings: Support for up to 3,072 dimensions for rich semantic representations
  • Configurable Truncation: Control how input text is truncated when exceeding token limits (START, END, or NONE)
  • Purpose Optimization: Optimize embeddings for specific use cases (GENERIC_INDEX, GENERIC_RETRIEVAL, or CLASSIFICATION)
  • Multimodal Model: Leverages Amazon's Nova 2 multimodal architecture for consistent embeddings across different content types

Example spicepod.yml configuration:

embeddings:
- from: bedrock:amazon.nova-2-multimodal-embeddings-v1:0
name: nova_embeddings
params:
dimensions: '3072' # Required: Output dimensions
truncation_mode: START # Optional: START, END, or NONE (default: NONE)
embedding_purpose: GENERIC_RETRIEVAL # Optional. GENERIC_INDEX is default

For more details on the embedding parameters and configuration options, refer to the Amazon Nova Embeddings Documentation and the Spice Embeddings Documentation.

DynamoDB Timestamp Filter Pushdown

The DynamoDB Data Connector now supports timestamp filter pushdown, enabling more efficient append-mode acceleration refreshes by pushing timestamp filters directly to DynamoDB queries. Since DynamoDB stores timestamps as strings rather than native datetime types, this feature includes configurable timestamp formatting to ensure correct parsing and filtering.

Key Features:

  • Filters on timestamp columns are now pushed down to DynamoDB, reducing data transfer and improving query performance
  • Support for Go-style datetime formatting patterns to handle various timestamp string formats
  • Uses ISO 8601 format by default when no custom format is specified

Example spicepod.yml configuration:

datasets:
- from: dynamodb:sales
name: sales
time_column: created_at
time_format: timestamptz
params:
time_format: 2006-01-02T15:04:05.000Z07:00
acceleration:
enabled: true
engine: duckdb
refresh_mode: append

For more details, refer to the DynamoDB Data Connector Documentation.

HTTP Data Connector Health Probe Configuration

The HTTP Data Connector now supports configurable health probe paths for endpoint validation. Instead of using a random non-existent path, the system can now validate endpoints using a user-specified path, improving flexibility and reliability for health checks.

Example spicepod.yml configuration:

datasets:
- from: https://api.tvmaze.com
name: tvmaze
params:
file_format: json
health_probe: /health-check

For more details, refer to the HTTP Data Connector Documentation.

Spice .NET SDK v0.2

The Spice .NET SDK has been upgraded with expanded .NET version support, custom User-Agent configuration, and updated gRPC libraries: spice-dotnet v0.2.0. The SDK is available on NuGet.

Key Features:

  • Expanded .NET Support: Now supports .NET Standard 2.0, .NET Core 8.0, 9.0, and 10.0.
  • Custom User-Agent: Configure custom User-Agent headers for client identification and telemetry.
  • Updated gRPC Libraries: Upgraded gRPC dependencies and netstandard for improved performance and reliability

Upgrade Example:

dotnet add package SpiceAI --version 0.2.0

For more details, refer to the .NET SDK Documentation.

Additional Improvements & Bug Fixes

  • Reliability: Fixed view loading to respect topological order, preventing dependency resolution errors.
  • Reliability: Migrated from deprecated trust_dns_resolver to hickory_resolver for improved DNS resolution reliability.
  • Security: Fixed arbitrary file access vulnerability during archive extraction ("Zip Slip") to prevent potential security exploits.
  • Distributed Query: Fixed object store initialization across scheduler/executor gap, improving reliability for distributed query execution.
  • Distributed Query: Optimized query routing by preventing runtime.* schema queries from being sent to the scheduler, improving performance for metadata queries.
  • Performance: Added Blake3 and xxHash support with xxh3_64 as the default caching hashing algorithm for improved cache and query performance.
  • Performance: Optimized default Zstd compression level to 6 for better balance between compression ratio and speed.
  • UX: Improved dataset loading output with clearer progress indicators and status messages.

Contributors

Breaking Changes

No breaking changes.

Cookbook Updates

No major cookbook updates.

The Spice Cookbook includes 82 recipes to help you get started with Spice quickly and easily.

Upgrading

To upgrade to v1.9.1, use one of the following methods:

CLI:

spice upgrade

Homebrew:

brew upgrade spiceai/spiceai/spice

Docker:

Pull the spiceai/spiceai:1.9.1 image:

docker pull spiceai/spiceai:1.9.1

For available tags, see DockerHub.

Helm:

helm repo update
helm upgrade spiceai spiceai/spiceai

AWS Marketplace:

🎉 Spice is now available in the AWS Marketplace!

What's Changed

Changelog

  • fix integration tests: order by the query to make snapshots deterministic by @phillipleblanc in #8198
  • Add health probe override by @lukekim in #8236
  • Use Moka optionally_get_with for SWR single-in-flight semantics by @lukekim in #8231
  • fix: Arbitrary file access during archive extraction ("Zip Slip") by @phillipleblanc in #8242
  • Migrate trust_dns_resolver to hickory_resolver by @phillipleblanc in #8243
  • fix: Deny assert macros in non-test code by @peasee in #8223
  • Distributed query: Object store initialization across scheduler/executor gap, misc bugfixes & improvements by @mach-kernel in #8009
  • Add Blake3, enable xxHash, set xxh3_64 as default, add bench by @lukekim in #8157
  • Make cache zstd default compression level 6 by @lukekim in #8234
  • Use seed for xxh3 by @lukekim in #8232
  • DynamoDB Timestamp Filter Pushdown by @krinart in #8235
  • Add ready_wait for mongo-arrow benchmarks by @krinart in #8246
  • Add support for amazon.nova-2-multimodal-embeddings-v1:0 by @Jeadie in #8225
  • Improve the output of dataset loading by @lukekim in #8256
  • Load views in topological order by @lukekim in #8255
  • Distributed query: Do not send runtime.* schema queries to scheduler by @mach-kernel in #8271
  • Remove input length check for Nova model. by @Jeadie in #8270

Spice v1.8.1 (Oct 13, 2025)

· 5 min read
Viktor Yershov
Senior Software Engineer at Spice AI

Announcing the release of Spice v1.8.1! 🚀

Spice v1.8.1 is a patch release that adds Acceleration Snapshots Indexes, and includes a number of bug fixes and performance improvements.

What's New in v1.8.1

Acceleration Snapshot Indexes

  • Management of Acceleration Snapshots has been improved by adopting an Iceberg-inspired metadata.json, which now encodes pointer IDs, schema serialization, and robust checksum and size, which is validate before loading the snapshot.

  • Acceleration Snapshot Metrics: The following metrics are now available for Acceleration Snapshots:

  • dataset_acceleration_snapshot_bootstrap_duration_ms: The time it took the runtime to download the snapshot - only emitted when it initially downloads the snapshot.

  • dataset_acceleration_snapshot_bootstrap_bytes: The number of bytes downloaded to bootstrap the acceleration from the snapshot.

  • dataset_acceleration_snapshot_bootstrap_checksum: The checksum of the snapshot used to bootstrap the acceleration.

  • dataset_acceleration_snapshot_failure_count: Number of failures encountered when writing a new snapshot at the end of the refresh cycle. A snapshot failure does not prevent the refresh from completing.

  • dataset_acceleration_snapshot_write_timestamp: Unix timestamp in seconds when the last snapshot was completed.

  • dataset_acceleration_snapshot_write_duration_ms: The time it took to write the snapshot to object storage.

  • dataset_acceleration_snapshot_write_bytes: The number of bytes written on the last snapshot write.

  • dataset_acceleration_snapshot_write_checksum: The SHA256 checksum of the last snapshot write.

To learn more, see the Acceleration Snapshots Documentation and the Metrics Documentation.

Improved Regular Expression for DuckDB acceleration

Regular expression support has been expanded when using DuckDB acceleration for functions like regexp-like and regexp_match.

For more details, refer to the SQL Reference for the list of available regular expression functions.

Additional Improvements & Bugfixes

  • Reliability: Resolved an issue with partitioning on empty partition sets.
  • Validation: Added better validation for incorrectly configured Spicepods.
  • Reliability: Fixed partition_by accelerations when a projection is applied on empty partition sets.
  • Performance: Ensured ListingTable partitions are pruned when filters are not used.
  • Performance: Don't download acceleration snapshots if the acceleration is already present.
  • Performance: Refactored some blocking I/O and synchronization in the async codebase by moving operations to tokio::task::spawn_blocking, replacing blocking locks with async-friendly variants.
  • Bugfix: Nullable fields are now supported for S3 Vectors index columns.

Contributors

Breaking Changes

No breaking changes.

Cookbook Updates

  • New Accelerated Snapshots Recipe - The recipe shows how to bootstrap DuckDB accelerations from object storage to skip cold starts.

The Spice Cookbook includes 81 recipes to help you get started with Spice quickly and easily.


Upgrading

To upgrade to v1.8.1, use one of the following methods:

CLI:

spice upgrade

Homebrew:

brew upgrade spiceai/spiceai/spice

Docker:

Pull the spiceai/spiceai:1.8.1 image:

docker pull spiceai/spiceai:1.8.1

For available tags, see DockerHub.

Helm:

helm repo update
helm upgrade spiceai spiceai/spiceai

AWS Marketplace:

🎉 Spice is now available in the AWS Marketplace!

What's Changed

Changelog