Alternative installation mode for deployments with a large number of nodes
Details
| Detail name | Value |
|---|---|
| Changelog Number | 27824 |
| Type | New Feature |
| Status | Resolved |
| Fix Versions | Exasol 2025.1.9, Exasol 2026.1.0 |
| Resolution Date | 2026-02-18 |
Background
During the installation process, the installation package gets copied from the installation machine to each database node in parallel. Once it's copied to all nodes, then it’s also extracted in each of them.
This process is slow and/or occasionally fails on deployments when 50 or more nodes are present.
New feature
A new CCC_HOST_COPY_LIMIT configuration parameter has been added. It determines how the installation package is copied between the nodes:
- CCC_HOST_COPY_LIMIT<=1: the installation package is copied to all nodes at once, then it’s extracted on all of them. This is the current behaviour.
- CCC_HOST_COPY_LIMIT>=2: the installation package is copied and extracted to a set of N nodes, N being defined by the CCC_HOST_COPY_LIMIT parameter. Once this process its complete, each one of these nodes copies and extracts the installation package to a different set of N nodes. These process is repeated until the installation package has been copied and extracted to all nodes.
