PATENT CLAIM ANALYSIS

Application Number: 15877405
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["711", "162000"]

Abstract:
A multi-node data storage system comprises a first data storage system having an owner node and a backup node in a first location coupled to a second data storage system having an owner node and a backup node in a second location. Each storage system includes a copy of the same data volume. A failure of a node of the multi-node storage system is detected. An outstanding write request to the first storage system is identified. If the owner node in the first storage system fails, it is determined whether the outstanding write corresponds to a host write to the backup node of the first storage system. If so, a retransmission message is sent to the second storage system. Otherwise, the data region associated with the outstanding write request is read from the first storage system, and a resynchronization message is sent to the second storage system.

Claim (Index 1):
In a multi-node storage system comprising a first data storage system having an owner node and a backup node in a first location, and a second data storage system having an owner node and a backup node in a second location, wherein the first data storage system is communicatively coupled to the second data storage system and each of the first and second data storage systems includes a copy of the same data volume, a method comprising:\n detecting failure of a node of the multi-node data storage system; identifying an outstanding write request to the first data storage system; wherein, if the failed node is the owner node of the first data storage system, the method further comprises:\n determining whether the outstanding write request corresponds to a host write to the backup node of the first data storage system, and \n if the outstanding write request corresponds to a host write to the backup node of the first data storage system, sending a retransmission message of the outstanding write request to a node of the second data storage system, the retransmission message comprising an indicator that the write request is a retransmission, the data to be written and the region in the data volume where the data is to be written; or \n if the outstanding write request does not correspond to a host write to the backup node of the first data storage system, reading the data region associated with the outstanding write request from the first data storage system, and sending a resynchronization message to a node of the second data storage system, the resynchronization message comprising an indicator that the write request is a resynchronization, the data read from the first data storage system to be written and the region in the data volume where the data is to be written.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 86.0
- Lexical Diversity: 2.92593
- Patent Class: 711.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15598362', '12695250', '11415689', '14509471', '10674872']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5079693996102418
- 35 USC 102 Novelty (BERT): 0.495812170196429
- Combined Prediction Score: 0.5067536766688605
- Mean Citation Score: 197.024912
- Max Citation Score: 251.55624
- Similarity Product: 185.53674931428912

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test