S3 parameters

Use the following parameters to configure reading from S3 file systems and on-premises storage with S3-compatible APIs, using COPY.

Use the following parameters to configure reading from S3 file systems and on-premises storage with S3-compatible APIs, using COPY. For more information about reading data from S3, see S3 Object Store.

For external tables using highly partitioned data in an object store, see the ObjectStoreGlobStrategy configuration parameter and Partitions on Object Stores.

Query the CONFIGURATION_PARAMETERS system table to determine what levels (node, session, user, database) are valid for a given parameter.

AWSAuth

ID and secret key for authentication. For extra security, do not store credentials in the database; use ALTER SESSION...SET PARAMETER to set this value for the current session only. If you use a shared credential, you can set it in the database with ALTER DATABASE...SET PARAMETER. For example:

=> ALTER SESSION SET AWSAuth='ID:secret';

In AWS, these arguments are named AccessKeyID and SecretAccessKey.

To use admintools create_db or revive_db for Eon Mode on-premises, create a configuration file called auth_params.conf with these settings:

AWSAuth = key:secret
  AWSEndpoint = IP:port

AWSCAFile

File name of the TLS server certificate bundle to use. Setting this parameter overrides the Vertica default CA bundle path specified in the SystemCABundlePath parameter.

If set, this parameter overrides the Vertica default CA bundle path specified in the SystemCABundlePath parameter.

=> ALTER DATABASE DEFAULT SET AWSCAFile = '/etc/ssl/ca-bundle.pem';

Default: system-dependent

AWSCAPath

Path Vertica uses to look up TLS server certificates. The file name of the TLS server certificate bundle to use.

If set, this parameter overrides the Vertica default CA bundle path specified in the SystemCABundlePath parameter.

=> ALTER DATABASE DEFAULT SET AWSCAPath = '/etc/ssl/';

Default: system-dependent

AWSEnableHttps

Boolean, specifies whether to use the HTTPS protocol when connecting to S3, can be set only at the database level with ALTER DATABASE. If you choose not to use TLS, this parameter must be set to 0.

Default: 1 (enabled)

AWSEndpoint

Endpoint to use when interpreting S3 URLs, set as follows.

Important

Do not include http(s):// for AWS endpoints.

AWS: hostname_or_ip:port_number.
AWS with a FIPS-compliant S3 Endpoint: S3_hostname and enable virtual addressing:

Important
Do not include http(s)://
```
AWSEndpoint = s3-fips.dualstack.us-east-1.amazonaws.com
S3EnableVirtualAddressing = 1
```
On-premises/Pure: IP address of the Pure Storage server. If using admintools create_db or revive_db, create configuration file auth_params.conf and include these settings:
```
awsauth = key:secret
      awsendpoint = IP:port
```
When AWSEndpoint is not set, the default behavior is to use virtual-hosted request URLs.

Default: s3.amazonaws.com

AWSLogLevel

Log level, one of the following:

OFF
FATAL
ERROR
WARN
INFO
DEBUG
TRACE

**Default:**ERROR

AWSRegion

AWS region containing the S3 bucket from which to read files. This parameter can only be configured with one region at a time. If you need to access buckets in multiple regions, change the parameter each time you change regions.

If you do not set the correct region, you might experience a delay before queries fail because Vertica retries several times before giving up.

Default: us-east-1

AWSSessionToken

Temporary security token generated by running the get-session-token command, which generates temporary credentials you can use to configure multi-factor authentication.

Set this parameter in a user session using ALTER SESSION. You can set this parameter at the database level, but be aware that session tokens are temporary. When the token expires, any attempt to access AWS fails.

Note

If you use session tokens at the session level, you must set all parameters at the session level, even if some of them are set at the database level. Use ALTER SESSION to set session parameters.

AWSStreamingConnectionPercentage

Controls the number of connections to the communal storage that Vertica uses for streaming reads. In a cloud environment, this setting helps prevent streaming data from communal storage using up all available file handles. It leaves some file handles available for other communal storage operations.

Due to the low latency of on-premises object stores, this option is unnecessary for an Eon Mode database that uses on-premises communal storage. In this case, disable the parameter by setting it to 0.

S3BucketConfig

Contains S3 bucket configuration information as a JSON object with the following properties. Each property other than the bucket name has a corresponding configuration parameter (shown in parentheses). If both the property in S3BucketConfig and the configuration parameter are set, the S3BucketConfig property takes precedence.

Properties:

bucket: Name of the bucket
region (AWSRegion): Name of the region
protocol (AWSEnableHttps): Connection protocol, either http or https
endpoint (AWSEndpoint): Endpoint URL or IP address
enableVirtualAddressing (S3BucketCredentials): Whether to rewrite the S3 URL to use a virtual hosted path
requesterPays (S3RequesterPays): Whether requester (instead of bucket owner) pays the cost of accessing data on the bucket
serverSideEncryption (S3ServerSideEncryption): Encryption algorithm if using SSE-S3 or SSE-KMS, one of AES256, aws:kms, or an empty string
sseCustomerAlgorithm (S3SseCustomerAlgorithm): Encryption algorithm if using SSE-C; must be AES256
sseCustomerKey (S3SseCustomerKey): Key if using SSE-C encryption, either 32-character plaintext or 44-character base64-encoded
sseKmsKeyId (S3SseKmsKeyId): Key ID if using SSE-KMS encryption

The configuration properties for a given bucket might differ based on its type. For example, the following S3BucketConfig is for an AWS bucket AWSBucket and a Pure Storage bucket PureStorageBucket. AWSBucket doesn't specify an endpoint, so Vertica uses the value of AWSEndpoint, which defaults to s3.amazonaws.com:

ALTER DATABASE DEFAULT SET S3BucketConfig=
'[
    {
        "bucket": "AWSBucket",
        "region": "us-east-2",
        "protocol": "https",
        "requesterPays": true
    },
    {
        "bucket": "PureStorageBucket",
        "endpoint": "pure.mycorp.net:1234",
        "protocol": "http",
        "enableVirtualAddressing": false
    }
]';

S3BucketCredentials

Contains credentials for accessing an S3 bucket. Each property in S3BucketCredentials has an equivalent parameter (shown in parentheses). When set, S3BucketCredentials takes precedence over both AWSAuth and AWSSessionToken.

Providing credentials for more than one bucket authenticates to them simultaneously, allowing you to perform cross-endpoint joins, export from one bucket to another, etc.

Properties:

bucket: Name of the bucket
accessKey: Access key for the bucket (the ID in AWSAuth)
secretAccessKey: Secret access key for the bucket (the secret in AWSAuth)
sessionToken: Session token, only used when S3BucketCredentials is set at the session level (AWSSessionToken)

For example, the following S3BucketCredentials is for an AWS bucket AWSBucket and a Pure Storage bucket PureStorageBucket and sets all possible properties:

ALTER SESSION SET S3BucketCredentials='
[
    {
        "bucket": "AWSBucket",
        "accessKey": "<AK0>",
        "secretAccessKey": "<SAK0>",
        "sessionToken": "1234567890"
    },
    {
        "bucket": "PureStorageBucket",
        "accessKey": "<AK1>",
        "secretAccessKey": "<SAK1>"
    }
]';

This parameter is only visible to the superuser. Users can set this parameter at the session level with ALTER SESSION.

S3EnableVirtualAddressing

Boolean, specifies whether to rewrite S3 URLs to use virtual-hosted paths. For example, if you use AWS, the S3 URLs change to bucketname.s3.amazonaws.com instead of s3.amazonaws.com/bucketname. This configuration setting takes effect only when you have specified a value for AWSEndpoint.

If you set AWSEndpoint to a FIPS-compliant S3 Endpoint, you must enable S3EnableVirtualAddressing in auth_params.conf:

AWSEndpoint = s3-fips.dualstack.us-east-1.amazonaws.com
S3EnableVirtualAddressing = 1

The value of this parameter does not affect how you specify S3 paths.

Default: 0 (disabled)

Note

As of September 30, 2020, AWS requires virtual address paths for newly created buckets.

S3RequesterPays

Boolean, specifies whether requester (instead of bucket owner) pays the cost of accessing data on the bucket. When true, the bucket owner is only responsible for paying the cost of storing the data, rather than all costs associated with the bucket; must be set in order to access S3 buckets configured as Requester Pays buckets. By setting this property to true, you are accepting the charges for accessing data. If not specified, the default value is false.

S3ServerSideEncryption

String, encryption algorithm to use when reading or writing to S3. The value depends on which type of encryption at rest is configured for S3:

AES256: Use for SSE-S3 encryption
aws:kms: Use for SSE-KMS encryption
Empty string (""): No encryption

SSE-C encryption does not use this parameter. Instead, see S3SseCustomerAlgorithm.

For details on using SSE parameters, see S3 object store.

Default: "" (no encryption)

S3SseCustomerAlgorithm

String, the encryption algorithm to use when reading or writing to S3 using SSE-C encryption. The only supported values are AES256 and "".

For SSE-S3 and SSE-KMS, instead use S3ServerSideEncryption.

Default: "" (no encryption)

S3SseCustomerKey

If using SSE-C encryption, the client key for S3 access.

S3SseKmsKeyId

If using SSE-KMS encryption, the key identifier (not the key) to pass to the Key Management Server. Vertica must have permission to use the key, which is managed through KMS.