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Mar 14, 2024
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Improve Changing the store format #1475

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Improve Changing the store format
renetapopova Mar 8, 2024
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renetapopova Mar 14, 2024
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27 changes: 17 additions & 10 deletions modules/ROOT/pages/database-internals/store-formats.adoc
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Expand Up @@ -50,9 +50,23 @@ neo4j-admin database import full ... --format=block blockdb
// CREATE DATABASE blockdb OPTIONS {storeFormat: 'block'}
// ----

=== Changing the format of existing databases
=== Changing the store format of existing databases

Changing the store format is possible by re-writing all data in the new format using one of the following options:
Changing the store format is possible by re-writing all data in the new format.
Therefore, it requires that:

* The database is offline.
* There is enough disk space for both old and new copies of the database.
* The graph fits within the new <<store-formats-entity-limits, format's entity limits>>.

[NOTE]
====
Changing the store format can be a time-consuming operation, depending on the size and complexity of the data in the database.
Performance heavily depends on the speed of the disk and the amount of available memory.
====

. Stop the database using the Cypher command `STOP DATABASE mydb`.
. Change the store format of the stopped database using one of the following options:

* Migrate an existing database using xref:tools/neo4j-admin/migrate-database.adoc[`neo4j-admin database migrate`] command.
For example:
Expand All @@ -69,14 +83,7 @@ For example:
----
neo4j-admin database copy --to-format="block" mydb blockdb
----

Changing the store format requires that:

* The database is offline.
* There is enough disk space for both old and new copies of the database.
* The graph fits within the new <<store-formats-entity-limits, format's entity limits>>.

Changing store format can be a time-consuming operation, depending on the size and complexity of the data in the database. Performance heavily depends on the speed of the disk and the amount of available memory.
. After the successful completion, start the database using the Cypher command `START DATABASE mydb`.

=== Verify the store format

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