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Migrating and upgrading
You can upgrade to the 14.10 release of
HCL Informix®
or migrate from other database servers to
Informix®
. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the
Informix®
database server can affect upgrading from a previous release.
Migrating
Informix®
database systems
The
Informix® Migration Guide
describes how to move data manually between databases, servers, and computers.
Migration to and reversion from 14.10
Migrating and upgrading
You can upgrade to the 14.10 release of
HCL Informix®
or migrate from other database servers to
Informix®
. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the
Informix®
database server can affect upgrading from a previous release.
Migrating
Informix®
database systems
The
Informix® Migration Guide
describes how to move data manually between databases, servers, and computers.
Overview of migration
Migration to and reversion from 14.10
Preparing for migration to Version 14.10
Before you install the new version of
Informix®
, you must prepare the database server environment for migration by performing specified pre-migration tasks. If you are also migrating from 32-bit to 64-Bit database servers, you must perform additional tasks.
Enterprise Replication
and migration
You must coordinate the migration of all servers that are involved in data replication.
High-availability cluster migration
You must coordinate the migration and reversion of all servers that are involved in high-availability clusters. You can use a rolling upgrade in some cases to update servers while the cluster is online, with minimal interruption to client applications. Otherwise, you must schedule cluster downtime to upgrade the servers. A cluster must be offline to reverse an upgrade or revert to an earlier release.
Migrating to
Informix®
14.10
When you migrate to a new version of
Informix®
, you must complete required migration and post-migration tasks.
Reverting from
Informix®
Version 14.10
You can revert to the version of the database server from which you migrated. When you run the reversion utility, you specify the target server for reversion and then
Informix®
checks your database. If necessary,
Informix®
might tell you to drop new objects, before automatically converting your data into the target server.
Migration of data between database servers
Data migration utilities
Migration to and reversion from 14.10
Preparing for migration to Version 14.10
Before you install the new version of
Informix®
, you must prepare the database server environment for migration by performing specified pre-migration tasks. If you are also migrating from 32-bit to 64-Bit database servers, you must perform additional tasks.
Enterprise Replication and migration
You must coordinate the migration of all servers that are involved in data replication.
High-availability cluster migration
You must coordinate the migration and reversion of all servers that are involved in high-availability clusters. You can use a rolling upgrade in some cases to update servers while the cluster is online, with minimal interruption to client applications. Otherwise, you must schedule cluster downtime to upgrade the servers. A cluster must be offline to reverse an upgrade or revert to an earlier release.
Migrating to Informix 14.10
When you migrate to a new version of
Informix®
, you must complete required migration and post-migration tasks.
Reverting from Informix Version 14.10
You can revert to the version of the database server from which you migrated. When you run the reversion utility, you specify the target server for reversion and then
Informix®
checks your database. If necessary,
Informix®
might tell you to drop new objects, before automatically converting your data into the target server.
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