PATENT CLAIM ANALYSIS

Application Number: 16123738
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-08
Patent Classification: ["710", "068000"]

Abstract:
A storage apparatus and method of controlling same which, while preventing depletion of a storage area due to the generation of garbage, also prevent a drop in response performance from the perspective of the host, are proposed. One or more storage devices which constitute a pool, and a controller which manages a log-structured write space which is a virtual logical space, compresses data of a compression target among the data which has been written to the virtual volume by the host and logs the data in the log-structured write space, and writes the post-compression data which has been logged in the log-structured write space to the storage device, are provided in a storage apparatus, the controller restricting reception of a write request from the host when a used capacity of the pool is at or above a threshold; when the data logged in the log-structured write space has been updated, the controller determines whether a predetermined condition is satisfied and, when the predetermined condition is satisfied, the controller overwrites the compressed data of the pre-update data which has been logged in the log-structured write space with the compressed data of the post-update data.

Claim (Index 2):
The storage apparatus according to  claim 1 ,\n wherein, when the data which has been stored in the log-structured write space is updated and the compressed data of the post-update data has been logged in the log-structured write space, the compressed data of the pre-update data stored in the log-structured write space is managed as garbage, and wherein the controller overwrites the compressed data of the pre-update data stored in the log-structured write space with the compressed data of the post-update data when the post-compression data size of the post-update data is no more than the post-compression data size of the pre-update data stored in the log-structured write space and the data amount of the garbage in the pool is equal to or more than the difference between the pre-compression total data amount of each of the data items stored in the pool and the post-compression total data amount of each of the data items stored in the pool, or when the post-compression data size of the post-update data is no more than the post-compression data size of the pre-update data stored in the log-structured write space and the used capacity of the pool is equal to or more than the threshold.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 97.0
- Lexical Diversity: 2.49398
- Patent Class: 710.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15759842', '15557967', '13611100', '14762955', '12310107']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7100987331777829
- 35 USC 102 Novelty (BERT): 0.5042199842119086
- Combined Prediction Score: 0.6895108582811955
- Mean Citation Score: 237.27214
- Max Citation Score: 272.0548
- Similarity Product: 190.2760859496117

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test