I currently run vBulletin 4.x and I was wondering if I migrated if it would be a larger server load than what vBulletin produces? If so by how much more strain would it cause the server? I run a VPS, but I do have other clients hosted on it.
如果没有用户数量、主题数量等信息，根本无法预测负载。凭直觉，Discourse 的系统要求比 vBulletin 更高。不过，如果您注重成本，可以在非常廉价的 DigitalOcean 服务器上运行它。