Add cost of GC Check

[LeftHandCold]

User description

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue #16101

What this PR does / why we need it:

To avoid List() operations on oss, tke or s3, you need to add the Cost interface.

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PR Type

Enhancement

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Description

• Added Cost method to FileService interface and implemented it across various file service types.
• Introduced CostItem and CostAttr types to represent cost attributes.
• Defined constants CostLow and CostHugh to categorize costs.
• Added a cost check in the Check method of the checker to avoid high-cost operations.

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Changes walkthrough 📝

Relevant files

Enhancement

file_service.go Add cost attributes and method to FileService interface    pkg/fileservice/file_service.go Added Cost method to FileService interface. Introduced CostItem and CostAttr types. Defined constants CostLow and CostHugh. +15/-0    file_services.go Implement Cost method in FileServices                                        pkg/fileservice/file_services.go Implemented Cost method for FileServices. +6/-0      local_etl_fs.go Implement Cost method in LocalETLFS                                            pkg/fileservice/local_etl_fs.go Implemented Cost method for LocalETLFS. +6/-0      local_fs.go Implement Cost method in LocalFS                                                  pkg/fileservice/local_fs.go Implemented Cost method for LocalFS. +6/-0      memory_fs.go Implement Cost method in MemoryFS                                                pkg/fileservice/memory_fs.go Implemented Cost method for MemoryFS. +6/-0      s3_fs.go Implement Cost method in S3FS                                                        pkg/fileservice/s3_fs.go Implemented Cost method for S3FS. +6/-0      sub_path.go Implement Cost method in subPathFS                                              pkg/fileservice/sub_path.go Implemented Cost method for subPathFS. +6/-0      check.go Add cost check in checker                                                                pkg/vm/engine/tae/db/gc/check.go Added cost check in Check method of checker. +4/-0

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PR Review 🔍

⏱️ Estimated effort to review [1-5]	3, because the PR involves multiple changes across various files, introducing new types and methods which require understanding the existing architecture and ensuring the new logic integrates seamlessly without causing regressions.
🧪 Relevant tests	No
⚡ Possible issues	Consistency in Naming: The constant CostHugh might be a typo and should be CostHigh for clarity and consistency.
	Hardcoded Cost Values: The cost values are hardcoded in the Cost() method implementations across different file services. This might not be flexible if the cost characteristics change or need to be configurable in the future.
🔒 Security concerns	No

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PR Code Suggestions ✨

Category	Suggestion	Score
Maintainability	Rename CostHugh to CostHigh to correct the spelling Consider renaming CostHugh to CostHigh to correct the spelling and improve code readability. pkg/fileservice/file_service.go [173] -CostHugh +CostHigh Suggestion importance[1-10]: 10 Why: Corrects a clear spelling mistake, improving code readability and preventing potential confusion or errors in future development.	10
Possible bug	Add a check to ensure the Cost method does not return nil before accessing its List attribute Consider adding a check to ensure that the Cost method does not return nil before accessing its List attribute to avoid potential runtime panics. pkg/fileservice/s3_fs.go [54-55] -if c.cleaner.fs.Service.Cost().List != fileservice.CostLow { +costAttr := c.cleaner.fs.Service.Cost() +if costAttr == nil || costAttr.List != fileservice.CostLow { return nil } Suggestion importance[1-10]: 9 Why: This is a crucial suggestion to prevent runtime panics due to nil dereferencing, which is a common source of bugs in Go.	9
Enhancement	Retrieve the actual cost attribute from the underlying file services instead of returning a hardcoded value Instead of returning a new CostAttr instance with a hardcoded value, consider retrieving the actual cost attribute from the underlying file services to provide more accurate information. pkg/fileservice/file_services.go [171-173] -return &CostAttr{ - List: CostLow, +costAttr := &CostAttr{List: CostLow} +for _, fs := range f.services { + if fsCost := fs.Cost(); fsCost.List > costAttr.List { + costAttr.List = fsCost.List + } } +return costAttr Suggestion importance[1-10]: 7 Why: This suggestion improves the accuracy and flexibility of the Cost method by dynamically determining the cost based on underlying services, though the original hardcoded value might still be intentional for simplification.	7
	Add a SetCost method to the FileService interface to allow dynamic updates to the cost attributes Consider adding a SetCost method to the FileService interface to allow dynamic updates to the cost attributes, which can be useful for adjusting cost metrics at runtime. pkg/fileservice/file_service.go [64-65] // Cost returns the cost attr of the file service Cost() *CostAttr +// SetCost sets the cost attr of the file service +SetCost(cost *CostAttr) Suggestion importance[1-10]: 6 Why: Adding a SetCost method could enhance the flexibility of the interface, allowing runtime adjustments to cost metrics. However, the necessity and impact of this change depend on the specific use case and architecture.	6