Change default behavior of YCSB Workload A

[jnmt]

Description

This PR changes the default behavior of YCSB Workload A. Since the default transaction manager of ScalarDB, consensus commit, does not allow blind writes, the default value of the use_read_modify_write option should be true.

Related issues and/or PRs

• https://github.com/scalar-labs/docs-internal-scalardb/pull/1701/files#r2517674120

Changes made

• Change the default value of the use_read_modify_write option to true

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A

[gemini-code-assist]

Summary of Changes

Hello @jnmt, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the default configuration for YCSB Workload A to ensure compatibility with ScalarDB's transaction management system. By setting the use_read_modify_write option to true by default, the benchmark now correctly reflects the operational requirements of ScalarDB's consensus commit, which prohibits blind writes. This adjustment prevents potential issues during benchmark execution and aligns the workload's behavior with the underlying database's capabilities.

Highlights

• YCSB Workload A Default Behavior: The default behavior of YCSB Workload A has been modified to align with ScalarDB's transaction manager requirements.
• Read-Modify-Write Option: The default value for the use_read_modify_write option in YCSB Workload A is now set to true.
• Reasoning for Change: This adjustment is necessary because ScalarDB's consensus commit transaction manager does not permit blind writes, making read-modify-write operations essential by default for correct benchmark execution.

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[gemini-code-assist]

Code Review

This pull request changes the default behavior of YCSB Workload A to use read-modify-writes by setting use_read_modify_write to true by default. This is a sensible change as it makes the benchmark compatible with the default transaction manager, consensus-commit, which does not allow blind writes. My review points out that the class Javadoc for WorkloadA should be updated to reflect this new default behavior to avoid confusion.

[Copilot]

Pull Request Overview

This PR updates the default behavior of YCSB Workload A to use read-modify-write operations instead of blind writes, aligning with ScalarDB's default Consensus Commit transaction manager requirements.

• Changes the default value of use_read_modify_write from false to true in WorkloadA
• Ensures compatibility with Consensus Commit, which doesn't allow blind writes on existing records
• Maintains backward compatibility by allowing users to override the default through configuration

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[KodaiD]

LGTM. Thank you!

[brfrn169]

LGTM! Thank you!

[feeblefakie]

LGTM! Thank you!

[feeblefakie]

LGTM! Thank you!