Moving analytical workloads into self-managed ClickHouse from PostgreSQL, MySQL, Elasticsearch and older ClickHouse clusters, with the tools and data-model changes each path needs.
Offloading PostgreSQL analytics to self-managed ClickHouse with PeerDB change data capture: initial snapshot, logical replication slots, ReplacingMergeTree target tables, handling deletes, and why MaterializedPostgreSQL stays experimental.
What changes when PostgreSQL analytical queries move to ClickHouse: ordering keys instead of indexes, denormalization, ReplacingMergeTree for updated rows, JOIN rewrites and materialized views, with a checklist for validating results.
Moving reporting workloads off MySQL into ClickHouse: initial copy with the mysql table function, keeping data current, type mapping, rewriting queries, and running both systems during cutover.
Replacing an Elastic Stack used for observability with self-hosted ClickStack on ClickHouse: running both in parallel, mapping Elasticsearch types to ClickHouse, moving collectors to OpenTelemetry, and retiring Elasticsearch indexes.
Running clickhouse-local on a separate host to pull data from a source database or files and push it into a ClickHouse cluster, without opening the cluster to the source network or installing an ETL platform.
Migrating between self-managed ClickHouse clusters with remoteSecure, BACKUP and RESTORE, or replica addition: choosing a method by data size, keeping versions within the compatibility window, and cutting over clients.
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