Space Reservation for Distributed Storage Nodes
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Solution Overview
Problem
In distributed storage environments, destination nodes often lack sufficient space for data transfers due to concurrent data operations, leading to incomplete transfers, wasted resources, and inefficiencies in data restoration processes.
Innovation Solution
Implementing a space reservation process using a resource management module to reserve space on destination nodes before data transfer, allowing for retrying reservations at different nodes if initial attempts fail, and pausing or terminating transfers if reservations are unsuccessful.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If space is not reserved before data transfer in a decentralized distributed storage system, then the system maintains simplicity and autonomy of individual nodes, but concurrent data transfers can deplete available storage space on destination nodes leading to incomplete transfers and resource wastage
Solution Approach 1:
The patent implements a space reservation mechanism where the destination node pre-allocates storage space before the actual data transfer begins. This preliminary action ensures that sufficient space is guaranteed for the incoming data set, preventing incomplete transfers even when concurrent operations are occurring. The reservation is made by identifying available space, reserving it for the specific transfer operation, and then proceeding with the transfer, thereby resolving the reliability issue while maintaining decentralized operation.
2Reliability
If space reservation is implemented before data transfer, then successful data transfers are ensured, but additional coordination overhead and complexity are introduced to the decentralized system
Solution Approach 1:
The space reservation mechanism is implemented in a self-service manner where the destination node autonomously performs space identification, reservation, and release operations without requiring complex centralized coordination. The destination node checks its own available space, reserves the necessary amount, and releases the reservation upon successful transfer completion or failure. This self-service approach minimizes coordination overhead while ensuring reliable data transfers.
3Productivity
If space reservation is attempted at the first destination node without retry logic, then the process is simple and fast, but the transfer may fail if the first node lacks sufficient space, wasting network bandwidth and computational resources
Solution Approach 1:
The patent implements a feedback mechanism where the destination node responds to space reservation requests with either success or failure status. When the first destination node cannot accommodate the transfer, it returns a failure response that triggers the source node to select an alternative destination node. This feedback loop continues until a suitable destination is found, ensuring that network bandwidth and computational resources are not wasted on doomed transfers while maintaining efficient progression through the transfer process.
Data Source
AI summary
Techniques are described for reserving space on a destination node or volume for increasing the likelihood of a successful data transfer in a distributed storage environment. A reservation may be retried at one or more destinations if the reservation fails at a first destination. In some embodiments, the data-transfer process can be paused or terminated prior to data being transferred to one or more destinations if a reservation fails. Reserving space on a destination node or volume can increase the likelihood of a successful data transfer, which can increase the likelihood of efficient resources usage in a storage system.