• Object Storage Service

  1. Help Center
  2. Object Storage Service
  3. User Guide
  4. OBS Browser Operation Guide
  5. Logging
  6. Configuring Logging

Configuring Logging

After Logging is enabled for a bucket, OBS automatically converts bucket logs into objects following the naming rules and writes the objects into a target bucket.


The log delivery user group has been assigned the Write and ACL View permissions for the target bucket. For details, see section Configuring Bucket ACL.


  1. Log in to OBS Browser.
  2. Click the blank area in the row of the bucket for which you want to configure logging and choose More > Configure Logging.
  3. Select Enable, select a value for Target Bucket, and enter a value for Target Prefix, as shown in Figure 1. Then, click Save.

    Figure 1 Logging
    • Target Bucket indicates the bucket storing logs.
    • Target Prefix indicates the prefix of a log file name.

    After logging is enabled, generated logs are named using the following format:


    • <TargetPrefix> indicates the specific target prefix.
    • YYYY-mm-DD-HH-MM-SS indicates the date and time when the log is generated.
    • <UniqueString> indicates a character string generated by OBS.

    On OBS Browser, if configured <TargetPrefix> ends with a slash (/), logs generated in the bucket are stored in the <TargetPrefix> folder in the target bucket to facilitate management.

    For example:

    • If the target bucket is bucket and target prefix is bucket-log/, all logs are stored in the bucket-log/ folder in bucket. The log file is named as follows: 2015-06-29-12-22-07-N7MXLAF1BDG7MPDV.
    • If the target bucket is bucket and target prefix is bucket-log, all logs are directly stored in bucket. The log file is named as follows: bucket-log2015-06-29-12-22-07-N7MXLAF1BDG7MPDV.

    After log management is configured, you can view the operation logs in the target bucket that stores the logs within approximately fifteen minutes.

  4. In the dialog box that is displayed, click OK.