Cloud-based CAD file storage method based on command stream

doi:10.11996/JG.j.2095-302X.2025061216

Abstract

Abstract:

To enable rapid storage of 3D CAD files in the cloud, a cloud CAD file storage method based on command streams was proposed. A command-stream data-storage model was constructed; client operation commands ware classified and represented as command streams, and incrementally transmitted and stored as key-value pairs. A command stream log model was also built, taking commands as the smallest transaction unit, representing user modeling operations as recordable, replayable, and verifiable operation-log sequences, to enable atomic writes of command streams, command replay, version tracking, and state recovery. Meanwhile, a cloud-CAD file storage architecture was established, including an interaction module, a command-stream processing module, and a data-storage module; a two-layer storage mode was adopted to store command streams, geometric and topological data, respectively. Through case testing, the method was demonstrated to enable rapid and accurate transfer 3D CAD files in the cloud, verifying its effectiveness.

Key words: CAD, command stream, incremental transmission, log model, dual-tier storage

CLC Number:

XUE Shuncong, DU Xiaobing, SHAO Xin, GAO Duohua, WANG Tian, YANG Jiong. Cloud-based CAD file storage method based on command stream[J]. Journal of Graphics, 2025, 46(6): 1216-1223.

Figures/Tables 12

References 16

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字段	含义
CommandID	命令ID
ModelID	所属模型ID
UserID	用户ID
Timestamp	时间戳
CommandType	命令类型
CommandData	命令流数据
Dependencies	前置命令依赖
Version	版本号
Checksum	命令完整性校验
Status	命令状态

字段	含义
CommandID	命令ID
ModelID	所属模型ID
UserID	用户ID
Timestamp	时间戳
CommandType	命令类型
CommandData	命令流数据
Dependencies	前置命令依赖
Version	版本号
Checksum	命令完整性校验
Status	命令状态

对比项	Onshape	本文架构
架构类型	云端SaaS (纯web)	命令流增量存储架构
命令机制	FeatureScript	键值对命令流
数据组织	版本树结构(差分快照)	数据存储模型+日志模型
计算位置	云端计算为主	客户端+云端混合
性能优化	差分存储与压缩	命令流增量传输+异步写入
优势	高度集成、实时协同强	易扩展、高效同步

对比项	Onshape	本文架构
架构类型	云端SaaS (纯web)	命令流增量存储架构
命令机制	FeatureScript	键值对命令流
数据组织	版本树结构(差分快照)	数据存储模型+日志模型
计算位置	云端计算为主	客户端+云端混合
性能优化	差分存储与压缩	命令流增量传输+异步写入
优势	高度集成、实时协同强	易扩展、高效同步

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5	网络环境	下载带宽：80 Mbps 上传带宽：20 Mbps
6	浏览器	Microsoft Edge v141.0.3537.92