Altinity Project Antalya Builds for ClickHouse® 26.1

Here are the detailed release notes for Altinity Project Antalya build version 26.1. For more details on the project, see:

Release history

Version 26.1.11.20001 is the latest release. We recommend that you use this version.

Version Release date Details Docker images
26.1.11.20001 2026-04-28 CI report
Release page		 AMD64 and Aarch64
26.1.6.20001 2026-04-02 CI report
Release page		 AMD64 and Aarch64

v26.1.11.20001

Released 2026-04-28

CI report | Release page

26.1.11.20001 Altinity Antalya (75d2d67) as compared to v26.1.6.20001.altinityantalya (948d4e9a67012444f2e58f7f76c57eb4cdd272ef))

New Features

Improvements

  • Use object_storage_remote_initiator without object_storage_cluster on initial node. (#1608 by @ianton-ru)
  • Make changes to the export partition background engine and support experimental exports to apache iceberg (#1618 by @arthurpassos)
  • SELECT * FROM system.databases now always lists data lake catalog databases regardless of the show_data_lake_catalogs_in_system_tables setting. Previously they were hidden by default, which was inconsistent with SHOW DATABASES that always showed them. (ClickHouse#103444 by @alsugiliazova via #1690)
  • Change the default value of export_merge_tree_partition_manifest_ttl from 180 seconds to 86400 (a day). This gives visibility over completed export partitions on real usage scenarios. (#1692 by @arthurpassos)

Bug Fixes (user-visible misbehavior in an official stable release)

  • Fix rescheduleTasksFromReplica (#1568 by @ianton-ru)
  • Solved #1486 File identifier for distributed tasks was changed between 25.8 and 26.1 In frontport #1414 it was missed and rescheduleTasksFromReplica continued to use old variant. Fix unsynchronized access to replica_to_files_to_be_processed class member. (#1493 by @ianton-ru)
  • Fix Apache Iceberg queries not hitting the parquet metadata cache (#1631 by @arthurpassos)

Build/Testing/Packaging Improvements

And ALL Antalya features from previous releases

Packages

Available for both AMD64 and Aarch64 from builds.altinity.cloud/#altinityantalya as either .deb, .rpm, or .tgz

Docker images

Available for both AMD64 and Aarch64: altinity/clickhouse-server:26.1.11.20001.altinityantalya

Full Changelog: 948d4e9...75d2d67

v26.1.6.20001

Released 2026-04-02

CI report | Release page

Altinity Antalya release 26.1.6.20001.altinityantalya (948d4e9) as compared to upstream/v26.1.6.6-stable (078d5649b090d5006135479f9ca9b6a50fb39d22)

New Features

Performance Improvement

  • Improve the performance of data lakes. In previous versions, reading from object storage didn’t resize the pipeline to the number of processing threads. (ClickHouse#99548 by @alexey-milovidov via #1580)

Improvements

Bug Fixes (user-visible misbehavior in an official stable release)

  • Fixes an issue when Iceberg columns with dot in names returned NULL as values (ClickHouse#94335 by @mkmkme via #1448)
  • Use serialized metadata size to calculate the cache entry cell (#1484 by @arthurpassos)
  • Fix race condition on IPartitionStrategy (#1517 by @arthurpassos)
  • Fix timezone parameter in sorting key for Iceberg table when type of key is DateTime and setting iceberg_partition_timezone is used (#1526 by @ianton-ru)
  • Fix remote initiator host name (#1551 by @ianton-ru)
  • Fix export task not being killed during s3 outage (#1564 by @arthurpassos)
  • Use key (parsed without URI decoding) so that percent-encoded characters in object keys are preserved. Fixes issues where there retrieving data returns a 404 when there are slashes in s3 path (#1516 by @subkanthi)
  • Iceberg partitioning fix (ClickHouse#96620 by @scanhex12 via #1579)
  • Export Partition - release the part lock when the query is cancelled (#1593 by @arthurpassos)
  • Fix row policies silently ignored on Iceberg tables with PREWHERE enabled (#1597 by @mkmkme)

CI Fixes or Improvements

  • Fixes export part / partition tests failing under db disk integration test suites because those tests require MinIO traffict to be blocked and db disk relies on remote metadata stored in MinIO/s3 for plain merge tree tables, causing a deadlock and the suite to time out (#1478 by @arthurpassos)

And ALL Antalya features from previous releases

Packages

Available for both AMD64 and Aarch64 from builds.altinity.cloud/#altinityantalya as either .deb, .rpm, or .tgz

Docker images

Available for both AMD64 and Aarch64: altinity/clickhouse-server:26.1.6.20001.altinityantalya

Full Changelog: github.com/ClickHouse/ClickHouse/compare/v26.1.6.6-stable...Altinity:ClickHouse:v26.1.6.20001.altinityantalya