Requirements and Trade-Offs of Compression Techniques in Key–Value Stores: A Survey
Round 1
Reviewer 1 Report
This study explores compression techniques used by modern key-value stores, analyzes the strengths and weaknesses of various compression techniques in terms of compression ratio and computing overhead, and evaluates various factors on compression affects the storage usage and performance of key-value stores. However, I think this article falls short on some important issues.
1.The innovation of this article is not outstanding. Although the content of this article has certain significance for the study of key-value storage, it is only a comparison of compression techniques used in modern key-value storage. What is the breakthrough value of this study in theory?
2.There are problems with the structure of the article. Line 67-119 should be the content of the conclusion and should not be in Introduction. Related Work should be in the literature review.
3. This study lacks sufficient tracking of research in related fields.
Moderate editing of English language required.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The paper presents, analyzes, and evaluates compression techniques in Key-Value Stores. For the evaluation experiments have been conducted with different ratios of testing data, the achieved results are discussed and some suggestions are made.
Several improvements can be made.
As the authors several times mention “To the best of our” it would be better to enlarge the section Background and move it to the beginning of the paper. It also will help to better explain the goal and focus on this research.
The contribution part should be moved to the Conclusion section.
In the section Analysis, a justification of the choice of the techniques included in the experiments is needed.
The language and the style, also need improvements.
The language and the style, also need improvements, starting from the Abstract.
Some examples:
which have -> which has
and requirements of compression in key-value stores -> and requirements of compression in key-value stores.
in a near future-> in the near future
how the compression ratio impact the performance of key -> how the compression ratio impacts the performance of key
due to the overhead for decompressing larger data -> due to the overhead of decompressing larger data
…
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
The requirements and trade-offs of the compression techniques are studied in this paper. However, the abstract section mainly summarizes what the paper has done but fails to provide clear concluding sentences. The conclusion part of the paper is also not straightforward. It is recommended to summarize the main findings of this paper, expand the conclusion section, and add it to the abstract. Additionally, the author has proposed recommendations for the compression techniques, and it is suggested to concisely incorporate this portion into the abstract as well.
The overall structure of the article needs to be adjusted to be more logical for reading.
It is recommended to add some descriptions for the “Amazon Review data” and the “Twitter Trace data”, such as the source of the data, their size, etc.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
I think the authors have made revisions to address all the issues and questions raised in the previous review. The manuscript has been improved.
Minor editing of English language required.
Reviewer 2 Report
A number of changes have been made in this version. Several additions were made, starting from the abstract. The new structure of the manuscript presents the study in a better way.
I have no other suggestions for changes.
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