我们建议按已有的最佳做法进行导入与导出。本主题适用于 B2C Commerce。
如有可能，对于非目录来源，创建仅包含当前和以往来源之间差异的导入来源。这些称为变量来源。这类来源通常更小，导入更快，更不容易受到网络中断的影响。
要创建增量目录来源，不能包含将全局导入模式替换为字段特定导入模式的字段。例如，无法为套装产品创建变量来源，因为套装产品字段始终使用“替换”语义。
您无法回滚来源。因此，最佳做法是至少存档最后的 Feed，以便在无法验证新来源时重新导入旧版本。但是，B2C Commerce 不会自动清理存档，因此您必须清理存档文件。如需存档文件清理示范插件，请与客户支持人员联系。
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