Hello, I am experimenting the IO throttling with cgroups, with some good reading from online and experiments, I found that we have two options: 1. with CFQ IO scheduler, we can set a percentage of serving time one group can take, and if one group does not fully take its share, other (busy) group can steal the shares from the (ideal) group. 2. with deadline IO scheduler, we can set an absolute IOPS and bandwidth for one group, however, this does not consider the cost of serving the IO (e.g. sequential vs. random) and thus it is hard to give fair share between groups. Neither one seems fully fit into our requirement - we hope that cost model is based on the serving time, at the same time, we don't have one group be able to steal share from the other. By looking online, not sure if I missed anything, I didn't see a way to configure cgroups IO throttling to achieve the above requirement, besides, if it is not supported now, is there anything on the roadmap to support it in the future? Thanks, Guang -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
