Amazon S3到Amazon Redshift的数据加载可以通过以下两种方法进行:
以下是使用COPY命令将数据从Amazon S3加载到Amazon Redshift的示例代码:
COPY schema.table
FROM 's3://bucket_name/path/filename'
CREDENTIALS 'aws_access_key_id=;aws_secret_access_key='
FORMAT AS
其中,schema.table是要加载数据的目标表,s3://bucket_name/path/filename是数据文件在Amazon S3中的路径,aws_access_key_id和aws_secret_access_key是用于访问Amazon S3的凭证,是数据文件的格式,如CSV、JSON等。
以下是使用AWS Data Pipeline将数据从Amazon S3加载到Amazon Redshift的示例代码:
{
"objects": [
{
"id": "S3DataNode",
"name": "S3DataNode",
"type": "S3DataNode",
"scheduleType": "cron",
"schedule": "cron(0 1 * * ? *)",
"directoryPath": "s3://bucket_name/path/"
},
{
"id": "RedshiftCopyActivity",
"name": "RedshiftCopyActivity",
"type": "RedshiftCopyActivity",
"runsOn": {
"ref": "RedshiftCluster"
},
"input": {
"ref": "S3DataNode"
},
"output": {
"ref": "RedshiftDataNode"
},
"copyOptions": "json 'auto'"
},
{
"id": "RedshiftDataNode",
"name": "RedshiftDataNode",
"type": "RedshiftDataNode",
"clusterId": "cluster_identifier",
"databaseName": "database_name",
"tableName": "table_name",
"schema": "schema_name"
},
{
"id": "RedshiftCluster",
"name": "RedshiftCluster",
"type": "RedshiftCluster",
"region": "us-west-2",
"clusterId": "cluster_identifier",
"databaseName": "database_name",
"tableName": "table_name",
"schema": "schema_name",
"username": "username",
"password": "password"
}
],
"parameters": [
{
"id": "username",
"type": "String",
"description": "Redshift username"
},
{
"id": "password",
"type": "String",
"description": "Redshift password"
}
],
"values": {
"username": "your_redshift_username",
"password": "your_redshift_password"
}
}
在上述示例代码中,使用AWS Data Pipeline创建了一个定期运行的作业,从指定的Amazon S3路径加载数据到指定的Amazon Redshift表中。你需要将示例代码中的一些参数替换为你自己的值,如S3路径、Redshift集群标识符、数据库名、表名、模式、用户名和密码。
无论使用哪种方法,都可以将数据直接从Amazon S3加载到Amazon Redshift,而无需经过互联网传输。