Spectra Logic

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Common Request Header Elements

The Spectra S3 API uses Amazon S3 Signature Version 2 headers to pass authentication information. See Signing and Authenticating REST Requests for more information.

The following table describes headers that can be used by various requests.

Note:

CRC_32, MD5, and SHA-512 perform the best for their corresponding cryptographic strengths on the BlackPearl system.

Header Name	Description
Content-CRC32	The base64 encoded CRC32 checksum described in RFC 1952. This is limited to about 800 MB/sec per data stream.
Content-CRC32C	The base64 encoded CRC32C checksum described in RFC 3720 section B4. This is limited to about 300 MB/sec per data stream.
Content-MD5	The base64 encoded 128 bit MD5 cryptographic checksum. This is limited to about 200 MB/sec per data stream.
Content-SHA256	The base64 encoded 256 bit SHA cryptographic checksum. This is limited to about 75 MB/sec per data stream.
Content-SHA512	The base64 encoded 512 bit SHA cryptographic checksum. This is limited to about 100 MB/sec per data stream.
Naming-Convention	The naming convention for the response tags. Values: CONCAT_LOWERCASE, CONSTANT, UNDERSCORED, CAMEL_CASE_WITH_FIRST_LETTER_UPPERCASE, CAMEL_CASE_WITH_FIRST_LETTER_LOWERCASE Default: CAMEL_CASE_WITH_FIRST_LETTER_UPPERCASE