∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

Zheng & Qiao (2011) An Effective Approach to Preventing TCP Incast Throughput Collapse for Data Center Networks (GLOBECOM)

December 7, 2011 paper

This paper proposes an application-layer control on the number of concurrent senders in an incast application. The ideal number of concurrent senders is computed using the SRU, RTT and bottleneck buffer size. The paper assumes these parameters are available to the incast application. [more]

Ford et al (2011) TCP Extensions for Multipath Operation with Multiple Addresses (Internet Draft)

December 6, 2011 paper

The internet draft of MPTCP. MPTCP is a layer above TCP, so that the data stream from application is delivered by multiple TCP streams at the transport layer. The MPTCP layer is to merge the TCP streams into one stream, and deliver it to the application. [more]

MagSafe repair

August 13, 2011 blog system

This is the fourth MagSafe adapter for my 2008 MacBook Pro. Basically I keep failing the adapter once a year. The original one has the cable broken near the brick (yes, the loose strand problem), I fixed it in an ugly way; then I ordered a second one in a... [more]

Kulkarni & Agrawal (2011) A Probabilistic Approach to Address TCP Incast in Data Center Networks (ICDCS)

August 9, 2011 paper

Existing solution to incast: [more]

Hayashi et al (2011) Improving Fairness of Quantized Congestion Notification for Data Center Ethernet Networks (ICDCS)

August 9, 2011 paper

There are fairness issue in QCN, which leads to unequal bandwidth allocation. The fairness problem is caused by probabilistic feedback to reduce control overhead. Excessively large or small amount of feedback to RP may cause imbalanced bandwidth consumption. Moreover, increase/decrease of rate depends on current rate. This is also a... [more]