Before revision:  For a 1K-scale system , we surprisingly find that to reduce the service or job-level outlier proportion to 10\%, running Linux (version 2.6.32) or LXC (version 0.7.5) or XEN (version 4.0.0), respectively, the outlier proportion of a single server needs to be reduced by 871X, 2372X, 2372X accordingly.
After revision:  For a 1K-scale system , we surprisingly find that to reduce the service or job-level outlier proportion to 10\%, running Linux (version 2.6.32) or LXC (version 0.7.5) or XEN (version 4.0.0), respectively, we surprisingly find that so as to reduce the service outlier proportion to 10\% (10\% users will feel QoS degradation), the outlier proportion of a single server needs to be reduced by 871X, 2372X, 2372X accordingly.