Sorry, totally missed this because there is no notification system here... Let's say you have a large, tight loop in which Redis is used. If it's local, great,

Sorry, totally missed this because there is no notification system here... Let's say you have a large, tight loop in which Redis is used. If it's local, great, no problem. Now when it's centralized, you introduced a network delay you hadn't planned for. This "gotcha" comes up when you mess around with cache locality and didn't account for the delay changes in all areas of code.