Distributed File System Lock Data Migration
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Solution Overview
Problem
Traditional distributed file systems fail to migrate locking data associated with files when transferring files between storage devices, requiring clients to re-acquire locks, which can lead to inefficiencies and disruptions in data access.
Innovation Solution
The system migrates locking data, including granted and blocked locks, between nodes in a distributed file system by acquiring a guard to prevent changes during migration, updating connection identifiers, and modifying request paths to ensure seamless transfer without client involvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the file system transfers files between storage devices without transferring file locks, then the file transfer process is simple and fast, but the client must re-acquire locks which causes disruptions and inefficiencies
Solution Approach 1:
The patent combines the file transfer process with lock data migration. When a file is transferred from a first storage device to a second storage device, the associated lock data is simultaneously migrated along with the file. This merging ensures that the lock information travels with the file, eliminating the need for clients to re-acquire locks and maintaining both transfer efficiency and lock continuity.
Solution Approach 2:
The system performs preliminary migration of lock data before or during the file transfer process. By preparing and migrating the lock data in advance or concurrently with the file transfer, the system ensures that lock information is already available at the destination storage device, preventing any disruption to lock continuity while maintaining efficient file transfer.
2Device complexity
If the file system notifies the client to re-acquire locks after file movement, then the lock management is simplified, but system performance and stability deteriorate due to additional client involvement
Solution Approach 1:
The system implements self-service by automatically migrating lock data without requiring client notification or intervention. The file system autonomously handles the migration of lock information along with the file, eliminating the need for clients to re-acquire locks. This self-service approach maintains simple lock management while significantly improving system performance by avoiding additional client involvement.
3Ease of manufacture
If locking data is not migrated with files, then the migration process is simpler and faster, but data distribution and access restrictions are compromised
Solution Approach 1:
The patent merges the file migration process with lock data migration, so that both the file and its associated lock information are transferred together in a single operation. This approach maintains migration simplicity while ensuring data distribution integrity, as the lock data travels with the file and arrives at the same destination without requiring separate migration processes.
Data Source
AI summary
Systems and methods for migrating locking data for a file system object within a distributed file system. An example method may comprise: initiating a transfer of locking data from a first node of a distributed file system to a second node of the distributed file system, wherein the locking data is associated with a file system object and comprises a connection identifier indicating a connection between a client requesting a lock and the first node; constructing a modified connection identifier that indicates a connection between the client and the second node; and updating the second node to include the locking data with the modified connection identifier.