Resource scheduling method, device and system and central server

The embodiment of the invention discloses a resource control method, device and system and a central server. The method comprises the steps: receiving a first I/O request transmitted by a client; allocating a request number to the first I/O request based on a first number interval obtained from the central server; determining a label value of the first I/O request based on the request number of the first I/O request; based on the label value of the first I/O request, the first I/O request is scheduled, the label value is determined through the request number, and the first I/O request is scheduled according to the label value, so that the problem of uneven resource distribution is solved, and the quantity and concurrency number of the I/O requests are controlled according to the system concurrency capability. 本公开实施例公开了一种资源控制方法、设备、系统及中心服务器，其中，方法包括：接收客户端发送的第一I/O请求；基于从中心服务器获取到的第一编号区间，为第一I/O请求分配请求编号；基于第一I/O请求的请求编号，确定第一I/O请求的标签值；基于第一I/O请求的标签值，调度第一I/O请求，通过请求编号确定标签值，并根据标签值调度第一I/O请求，解决了资源分布不均匀的问题，实现了根据系统并发能力控制I/O请求的数