迁移配置

您可以使用 migrate-configuration 命令将旧版 Neo4j 配置文件迁移到当前格式。新版本将写入目标配置目录。源和目标配置目录的默认位置均为 NEO_CONF 指定的配置目录或此安装的默认配置目录。从 Neo4j 2025.01 开始，配置目录的根位置是 server.directories.configuration=conf。如果源目录和目标目录相同，则原始配置文件将被重命名。使用 --additional-config 选项提供的配置不会被迁移。

为什么要使用此命令？

  • 配置迁移是一个纯粹的机械过程，使用 migrate-configuration 命令进行显式迁移允许您检查和自定义输出。

  • 命令输出提供了对迁移过程的宝贵见解，包括关于无法有效迁移的设置的通知，例如，因为该概念或行为在 DBMS 的新 MAJOR 版本中已不存在。

语法

neo4j-admin server migrate-configuration 命令具有以下语法

neo4j-admin server migrate-configuration [-h] [--expand-commands]
                                         [--verbose] [--from-path=<path>]
                                         [--to-path=<path>]

选项

neo4j-admin server migrate-configuration 命令具有以下选项

表 1. neo4j-admin server migrate-configuration 选项
选项 描述

--expand-commands

允许在配置值评估中进行命令扩展。

--from-path=<path>

用作迁移源的配置目录路径。

-h, --help

显示此帮助消息并退出。

--to-path=<path>

应写入已迁移配置文件的目录路径。

--verbose

启用详细输出。

示例

以下示例展示了如何将旧版配置文件迁移到当前格式

bin/neo4j-admin server migrate-configuration --from-path=/path/to/legacy/neo4j-enterprise-5.9.0/conf/ --to-path=/path/to/new/neo4j-enterprise-5.26.1/conf/
示例输出
Keeping original user-logs.xml file at: /path/to/new/neo4j-enterprise-5.26.1/conf/user-logs.xml.old
User logging configuration xml file generated: /path/to/new/neo4j-enterprise-5.26.1/conf/user-logs.xml
Keeping original server-logs.xml file at: /path/to/new/neo4j-enterprise-5.26.1/conf/server-logs.xml.old
Server logging configuration xml file generated: /path/to/new/neo4j-enterprise-5.26.1/conf/server-logs.xml
server.directories.import=import UNCHANGED
server.bolt.enabled=true UNCHANGED
server.http.enabled=true UNCHANGED
server.https.enabled=false UNCHANGED
server.metrics.csv.rotation.compression=zip UNCHANGED
server.jvm.additional=-XX:+UseG1GC MIGRATED -> server.jvm.additional=-XX:+UseG1GC
server.jvm.additional=-XX:-OmitStackTraceInFastThrow MIGRATED -> server.jvm.additional=-XX:-OmitStackTraceInFastThrow
server.jvm.additional=-XX:+AlwaysPreTouch MIGRATED -> server.jvm.additional=-XX:+AlwaysPreTouch
server.jvm.additional=-XX:+UnlockExperimentalVMOptions MIGRATED -> server.jvm.additional=-XX:+UnlockExperimentalVMOptions
server.jvm.additional=-XX:+TrustFinalNonStaticFields MIGRATED -> server.jvm.additional=-XX:+TrustFinalNonStaticFields
server.jvm.additional=-XX:+DisableExplicitGC MIGRATED -> server.jvm.additional=-XX:+DisableExplicitGC
server.jvm.additional=-XX:-RestrictContended MIGRATED -> server.jvm.additional=-XX:-RestrictContended
server.jvm.additional=-Djdk.nio.maxCachedBufferSize=1024 MIGRATED -> server.jvm.additional=-Djdk.nio.maxCachedBufferSize=1024
server.jvm.additional=-Dio.netty.tryReflectionSetAccessible=true MIGRATED -> server.jvm.additional=-Dio.netty.tryReflectionSetAccessible=true
server.jvm.additional=-Djdk.tls.ephemeralDHKeySize=2048 MIGRATED -> server.jvm.additional=-Djdk.tls.ephemeralDHKeySize=2048
server.jvm.additional=-Djdk.tls.rejectClientInitiatedRenegotiation=true MIGRATED -> server.jvm.additional=-Djdk.tls.rejectClientInitiatedRenegotiation=true
server.jvm.additional=-XX:FlightRecorderOptions=stackdepth=256 MIGRATED -> server.jvm.additional=-XX:FlightRecorderOptions=stackdepth=256
server.jvm.additional=-XX:+UnlockDiagnosticVMOptions MIGRATED -> server.jvm.additional=-XX:+UnlockDiagnosticVMOptions
server.jvm.additional=-XX:+DebugNonSafepoints MIGRATED -> server.jvm.additional=-XX:+DebugNonSafepoints
server.jvm.additional=--add-opens=java.base/java.nio=ALL-UNNAMED MIGRATED -> server.jvm.additional=--add-opens=java.base/java.nio=ALL-UNNAMED
server.jvm.additional=--add-opens=java.base/java.io=ALL-UNNAMED MIGRATED -> server.jvm.additional=--add-opens=java.base/java.io=ALL-UNNAMED
server.jvm.additional=--add-opens=java.base/sun.nio.ch=ALL-UNNAMED MIGRATED -> server.jvm.additional=--add-opens=java.base/sun.nio.ch=ALL-UNNAMED
server.jvm.additional=-Dlog4j2.disable.jmx=true MIGRATED -> server.jvm.additional=-Dlog4j2.disable.jmx=true
server.windows_service_name=neo4j UNCHANGED
Keeping original configuration file at: /path/to/new/neo4j-enterprise-5.26.1/conf/neo4j.conf.old

此示例输出不应用于填充新的 Neo4j 5.26.1 neo4j.conf 文件。

语法正确的 2025.01 配置文件位于 /path/to/new/neo4j-enterprise-5.26.1/conf/，其中 /path/to/new/neo4j-enterprise-5.26.1/conf/ 是 --to-path= 的值。
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