service unavailable可翻译为服务不可用、找不到服务器等意思。 出现service available是一种系统的警告提示。service unavailable 表示服务器当前不能够处理客户端的请求,在一段时间之后,服务器可能会恢复正常,可以等待或刷新。 当一个网站的程序占资源太多或者发生太多的错误,系统日志就会提示:“应用程序池 'xxx' 被自动禁用,原因是为此应用程序池提供服务的进程中出现一系列错误。  扩展资料: HTTP状态码是用以表示网页服务器HTTP响应状态的3位数字代码。service unavailable的代码就是503。 常见的http状态码还有: 1、505 HTTP Version Not Supported 服务器不支持,或者拒绝支持在请求中使用的 HTTP 版本。 2、507 Insufficient Storage 服务器无法存储完成请求所必须的内容。 3、509 Bandwidth Limit Exceeded 服务器达到带宽限制。 参考资料:百度百科-HTTP状态码
Hello Stackoverflowers experts! I really do need a good start point here. I'm developing an application on iOS and Android, something more or less like whatsapp but with some extra stuff for my work. The problem is, that i'm not quite sure about where to begin with the server side. I mean, for the protocol in the client side i'm using XMPP, now. I want to know the path to learn to achieve the server side. Many of the answers i have read before tells about using BaaS but with the size of the company and that many more people could join etc. Some of the costs are high to keep paying them monthly as in the case of Parse.com.<br>My questions are these:<br>1.- MySQL will be the best for data storage and handling it? 2.- What kind of technology is the best to achieve this, speaking in terms about this will be used in iOS and Android app? Ruby On Rails?, Node.js? PHP? 3.- What is the best way to handle data, meaning photos, videos, etc? The database will be enough? 4.- is XMPP my best choice