S3 System Variables

This page documents system variables related to the S3 storage engine.

See Server System Variables for a complete list of system variables and instructions on setting system variables.

Also see the Full list of MariaDB options, system and status variables

Variables

s3_access_key

• Description: The AWS access key to access your data. See .

• Command line: --s3-access-key=val

• Scope: Global

• Dynamic: No

s3_block_size

• Description: The default block size for a table, if not specified in . Set to 4M as default. See .

• Command line: --s3-block-size=#

• Scope: Global

• Dynamic: Yes

s3_bucket

• Description: The AWS bucket where your data should be stored. All MariaDB table data is stored in this bucket. See .

• Command line: --s3-bucket=val

• Scope: Global

• Dynamic: No

s3_debug

• Description: Generates a trace file from libmarias3 on stderr (mysqld.err) for debugging the S3 protocol.

• Command line: --s3-debug=[0|1]

• Scope: Global

• Dynamic:

s3_host_name

• Description: Hostname for the S3 service. "s3.amazonaws.com", Amazon S3 service, by default

• Command line: --s3-host-name=val

• Scope: Global

• Dynamic: No

s3_no_content_type

• Description: If true (false is default), disables the Content-Type header, required for some providers.

• Command line: --s3-no-content-type=[0|1]

• Scope: Global

• Dynamic: No

s3_pagecache_age_threshold

• Description: This characterizes the number of hits a hot block has to be untouched until it is considered aged enough to be downgraded to a warm block. This specifies the percentage ratio of that number of hits to the total number of blocks in the page cache.

• Command line: --s3-pagecache-age-threshold=val

• Scope: Global

• Dynamic: Yes

s3_pagecache_buffer_size

• Description: The size of the buffer used for index blocks for S3 tables. Increase this to get better index handling (for all reads and multiple writes) to as much as you can afford. Size can be adjusted in blocks of 8192.

• Command line: --s3-pagecache-buffer-size=val

• Scope: Global

s3_pagecache_division_limit

• Description: The minimum percentage of warm blocks in key cache.

• Command line: --s3-pagecache-division-limit=val

• Scope: Global

• Dynamic: Yes

s3_pagecache_file_hash_size

• Description: Number of hash buckets for open files. Default 512. If you have a lot of S3 files open you should increase this for faster flush of changes. A good value is probably 1/10 of number of possible open S3 files.

• Command line: --s3-pagecache-file-hash-size=#

• Scope: Global

• Dynamic: No

s3_port

• Description: The TCP port number on the S3 host to connect to. A values of 0 means determine automatically.

• Command line: --s3-port=#

• Scope: Global

• Dynamic: No

s3_protocol_version

• Description: Protocol used to communication with S3. "Auto" is the default. If you get errors like "8 Access Denied" when you are connecting to another service provider, then try to change this option. The reason for this variable is that Amazon has changed some parts of the S3 protocol since they originally introduced it but other service providers are still using the original protocol. Can also be set numerically.

  • Auto (0):

  • Original or (1

s3_provider

• Description: Enable S3 provider specific compatibility tweaks. "Default", "Amazon", or "Huawei".

  • Default:

  • Amazon: Effectively sets to 5 (Domain), overriding any other setting it may have.

s3_region

• Description: The AWS region where your data should be stored. See .

• Command line: --s3-region=val

• Scope: Global

• Dynamic: No

s3_replicate_alter_as_create_select

• Description: When converting S3 table to local table, log all rows in binary log. This allows the slave to replicate CREATE TABLE .. SELECT FROM s3_table even it the slave doesn't have access to the original s3_table.

• Command line: --s3-replicate-alter-as-create-select=[0|1]

• Scope: Global

s3_secret_key

• Description: The AWS secret key to access your data. See .

• Command line: --s3-secret-key=val

• Scope: Global

• Dynamic: No

s3_slave_ignore_updates

• Description: Should be set if master and slave share the same S3 instance. This tells the slave that it can ignore any updates to the S3 tables as they are already applied on the master.

• Command line: --s3-slave-ignore-updates=[0|1]

• Scope: Global

• Dynamic: No

s3_ssl_no_verify

• Description: If true, SSL certificate verification for the S3 endpoint is disabled

• Command line: --s3-ssl-no-verify=[0|1]

• Scope: Global

• Dynamic: No

s3_use_http

• Description: If enabled, HTTP are used instead of HTTPS.

• Command line: --s3-use-http=[0|1]

• Scope: Global

• Dynamic: No

See Also

_{This page is licensed: CC BY-SA / Gnu FDL}