Docs

Torch Log Service

CloudLens for TOS

Log analysis fields

This document describes the access log fields for the log analysis feature.

The following fields are generated during TOS access. Before using the log analysis feature, you need to configure the log analysis dashboard. For details, see Configure a log analysis dashboard. Alternatively, enable the log analysis feature in the object storage service. For details, see Log analysis.

TOS access log (tos-log-topic) field descriptions

Name	Type	Description
AccessKeyld	text	Account ID.
Bucket	text	Object storage bucket name.
BucketLocation	text	The region where the object storage bucket is located.
CostTime	long	The time taken by the object storage server to process this request, in milliseconds.
DeltaDataSize	long	The change in storage size caused by the request, in bytes. Details are as follows: A positive value means the request increased the total data size. Operations such as uploading objects increase the total data size. A negative value means the request reduced the total data size. Operations such as permanently deleting an object reduce the total data size.
ECCode	text	The EC error code.
ErrorCode	text	Error code returned by object storage.
HTTPMethod	text	The HTTP request method.
HTTPSchema	text	The protocol of the HTTP request, including HTTP and HTTPS.
HTTPStatus	long	The HTTP status code returned for the request.
HistoricalVersionDeltaSize	long	The change in storage size for historical version objects (bytes) caused by the request. Details are as follows: A positive value means the request increased the size of historical object versions. In a versioning-enabled bucket, overwriting objects during upload or adding deletion marks increases the size of historical object versions. A negative value means the request reduced the size of historical object versions. Operations that reduce the size of historical version objects include deleting a delete marker when no latest version of the object exists and permanently deleting a historical object version. Notice You can calculate the change in storage capacity for the latest version of the object caused by the request using DeltaDataSize and HistoricalVersionDeltaSize. The calculation formula is as follows: Change in storage capacity for the latest version of the object = DeltaDataSize - HistoricalVersionDeltaSize
Host	text	The domain name accessed by the request.
LogType	text	Log type.
MRAPAlias	text	The alias of a multi-region access point.
MRAPDstBucket	text	The name of the bucket from which TOS retrieved an object when a user accessed TOS via a multi-region access point and requested an object that was not in the source bucket.
MirrorSourceStatus	long	The status code returned by the origin server in back-to-origin scenarios.
Object	text	Key of the requested object.
ObjectSize	long	Size of the requested object. measured in bytes.
Operation	text	The type of the action.
Ownerld	text	Account ID to which the object belongs.
Referer	text	The HTTP Referer of the request.
Remotelp	text	Client IP of the request.
Requestld	text	The request ID.
RequestSize	long	The value of Content-Length in request header, measured in bytes.
RequestSourceType	text	Synchronous request type. Hyphen (-): Regular request. cdn: CDN back-to-origin request. crr-sync: Cross-region replication request. lifecycle: Lifecycle rule. accelerate: Transfer acceleration request.
RequestUri	text	The URI of the HTTP request, including query-string.
Requesterld	text	The ID of the requester.
RequesterUserName	text	The username of the requester.
ReservedFiled	text	Reserved field, displayed as "-".
RespTime	long	Response time, which refers to the time it takes to respond with the first byte after receiving a request, measured in milliseconds.
ResponseSize	long	The value of Content-Length in response header, measured in bytes.
StorageClass	text	The storage class of the object storage bucket. STANDARD: Standard Storage IA: Infrequent access storage. ARCHIVE_FR: Flashback Archive. ARCHIVE: Archive storage. COLD_ARCHIVE: Cold Archive. DEEP_COLD_ARCHIVE: Deep Cold Archive.
Time	text	The time when TOS received the request.
UserAgent	text	The HTTP User-Agent header.
Versionld	text	The version number of the requested object.

Last updated: 2026.09.08 17:55:18