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Cloud Log Service

DokumentasiCloud Log ServiceProduct IntroductionLimitsLog CollectionSpecifications and Limitations of COS Data Import

Specifications and Limitations of COS Data Import

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Terakhir diperbarui: 2026-05-27 21:19:34

Console Limits

Item
Description
File preview limits
Preview is supported only for files smaller than 1 GB.

Import Limits

Item
Description
Single file size
The size of a single file cannot exceed 5 GB. If the limit is exceeded, the entire file will be ignored by the import task.
Size of a Single Log
The maximum size for a single-line log is limited to 512 KB. If the size of a log entry exceeds 512 KB, it will be truncated to retain only the first 512 KB.
The maximum size for each log entry in multi-line logs is limited to 1 MB following division using the line-start regular expression.
Regular Expression
Perl-compatible regular expressions are supported.
Behavior on parsing failure
It is recommended to enable the upload on parsing failure feature, which ensures that logs that fail to be parsed are uploaded to the preset index in a single-line full-text format. If this feature is not enabled, logs with parsing failures will be discarded.
Key field length
The maximum length for a Key field is 128 bytes for both delimiter and regular expression parsing modes.
Number of key-value pairs
In all parsing modes, the maximum number of key-value pairs that can be extracted is 1,000. Any excess will be discarded.

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