Torch Object Storage
Torch Object Storage
Torch Object Storage
Document
What's New
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Getting Started
User Guide
Working with buckets
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Managing lifecycle
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Event notification
Intelligent Tiering
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Domain management
Fault tolerance and disaster recovery
Cross-region replication
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Image processing
ObjectSet
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Common configuration scenarios
Authorizing IAM users of the current account
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DevMind
TOS accelerator
SenseFlow
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Vector bucket
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Vector bucket
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Vector bucket
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Vector bucket
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tosutil
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FSX best practices
TOS PyTorch Connector
tosfsspec
API Reference
Signature Mechanism
The header contains a signature
Bucket
Basic Bucket Operations
Bucket Lifecycle
Access Monitor
Bucket ACL
Bucket CORS
Bucket Policy
Back-to-origin Rules
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Versioning
Static Website
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Custom Domain
Server-side encryption
Transfer Acceleration
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Image processing
Media processing
Video transcoding
Audio transcoding
video to GIF
Document preview
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Requester pays
TLS version
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Object ACL
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Symbolic Link
WORM object
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SDK Reference
Java
Pre-signing Mechanism
Bucket Interface
Basic Bucket Interface
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Object Interface
Upload Object
Download Object
Upload and Download Speed Limit
Copy Object
List Object
Data Processing
Image Processing
Video Processing
Audio Processing
Log Configuration
Hierarchical Namespace
Bucket base interface
Introduction to Typical Scenes
Python
Data processing
Pre-signature mechanism
Bucket interface
Basic bucket interface
Manage bucket configuration
Object interface
Upload object
Download object
Copy object
List objects
Introduction to typical scenes
C
Object Interface
Upload object
C++
Pre-signature Mechanism
Bucket Interface
Basic Bucket Interface
Manage Bucket Configuration
Object Interface
Upload Object
Download Object
Copy Object
List Objects
Data Processing
Go
Object Interface
Upload Object
Download Object
Copy Object
List Objects
Manage Objects
Bucket Interface
Manage Bucket Configuration
Data Processing
Log Configuration
Introduction to Typical Scenes
Pre-signature Mechanism
Node.js
Pre-signature Mechanism
Bucket Interface
Basic Bucket Interface
Manage Bucket Configuration
Object Interface
Upload object
Download object
Copy object
List objects
Data Processing
Image Processing
Introduction to Typical Scenes
Browser.js
Pre-signature Mechanism
Upload Object
Download Object
Copy Object
List Objects
Manage Objects
Data Processing
.NET
Bucket Interface
Object Interface
Upload Object
Download Object
List Objects
Introduction to Typical Scenes
PHP
Bucket Interface
Object Interface
Download Object
Data Processing
Exception Handling
Android
Bucket Interface
Object Interface
Upload Object
Download Object
Exception Handling
iOS
Bucket Interface
Object Interface
Upload Object
Download Object
Harmony
Pre-signature Mechanism
Bucket Interface
Object Interface
Upload Object
Download Object
List Objects v2
Introduction to Typical Scenarios
Rust
Pre-signing mechanism
Bucket interface
Basic bucket operations
Lifecycle rules
Bucket ACLs
Cross-origin resource sharing
Bucket inventory
Back-to-origin rules
Bucket replication
Static website hosting
Event notification
Custom domain
Server-side encryption
Object interface
Basic operation
Access control
Error Codes
01-SERVICE_ERROR
02-AUTH
03-ACCESS_CONTROL
04-QOS
05-REQUEST
06-BUCKET
07-LIFECYCLE
08-ACL
09-CORS
10-POLICY
11-MIRROR
12-REPLICATION
13-WEBSITE
14-NOTIFICATION
15-ENCRYPT
16-CUSTOMDOMAIN
17-OBJECT
18-TAG
19-MULTIPART
20-STORAGE_CLASS
21-CALLBACK
22-DATA_PROCESS
23-BATCH
24-STORAGE_LENS
25-INVENTORY
26-DIRECTORY_BUCKET
FAQ
Best Practices
AIGC-Doubao LLMs
Accessing TOS with third-party tools
Granting temporary access
Data migration
Data processing
Checking data integrity
Performance optimization
- Documentation
Torch Object StorageSDK ReferenceJavaLog ConfigurationLog Configuration (Java SDK)
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Download PDFLog Configuration
Log Configuration (Java SDK)
Copy pageDownload PDFLog Configuration (Java SDK)
The TOS Java SDK provides a logging feature that allows you to view request-related information by enabling logging.
Log Description
The TOS Java SDK uses the slf4j logging framework and prints logs at the following locations.
- When calculating the request signature, print the canonical request log at the DEBUG log level.
- When calculating the request signature, print the string to sign log with a log level of DEBUG.
- When a request is successful, log the HTTP status code, requestId, total request duration, and other relevant information. The log level is INFO.
- When a client request fails (excluding cases where the server returns TosServerException), print the failure information with the log level set to INFO.
- When a request succeeds or fails, print the request chain timing information, including DNS resolution, connection establishment, sending/receiving requests, etc. The log level is set to DEBUG.
Method for Enabling Logging
The TOS Java SDK utilizes the slf4j logging framework. Users may bind and customize log4j, log4j2, JUL, or other logging frameworks according to specific business requirements.
Sample Log Content
An example of log content is provided below.
18:11:35.627 [main] DEBUG com.volcengine.tos.auth.SignV4 - canonical request:
GET
/
list-type=2&prefix=example_dir%2F
date:20221209T101135Z
host:bucket-example.your endpoint
x-tos-date:20221209T101135Z
date;host;x-tos-date
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
18:11:35.629 [main] DEBUG com.volcengine.tos.auth.SignV4 - string to sign:
TOS4-HMAC-SHA256
20221209T101135Z
20221209/your region/tos/request
74ce8b173574bcb5dcd50cad3c35d1900121dd44e720ce62473756b69e44e1a3
18:22:55.046 [main] INFO com.volcengine.tos.internal.RequestTransport - tos: status code:404, request id:1cc948930c7f7d0463930c7f-ac1811f3-1p3aWt-GO-cgb-tos, request cost 512 ms, request 1 times
18:22:55.048 [main] DEBUG com.volcengine.tos.internal.RequestTransport - requestId: 1cc948930c7f7d0463930c7f-ac1811f3-1p3aWt-GO-cgb-tos, method: GET, host: bucket.tos-cn-beijing.volces.com, request uri: /example_dir%2Fexample_object.txt, dns cost: 112 ms, connect cost: 323 ms, tls handshake cost: 275 ms, send headers and body cost: 1 ms, wait response cost: 3 ms, request cost: 508 ms
Last updated: 2025.09.22 11:34:15
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