T-RACKs is a Timely ACKs Retransmission mechanism designed to resolve the inadequacy problem of TCP Retransmission Timeout in data centre networks. Specifically, it aims at building a hypervisor based (end-to-end) scheme to accurately estimate the actual RTT measured at the hypervisor level and leverage the Fast Retransmit and Recovery mechanism by sending FAKE DUPACKs to the senders.

It is implemented as a hardware prototype in Linux Kernel as a Load-able Kernel Module and NetFilter framework is used for packet interception.

Please Refer to the [InstallME] file for more information about installation and possible usage scenarios.

To run an experiment of T-RACKs, install T-RACKs on the end-hosts, download and install the traffic generator [Here] then issue the following:

cd experiments
./run_tracks.sh one 1110 1 7000 1000 conf/client_config_oneWEB.txt 172.16.0.1:8001 XMLRPC 1 28 0 0 0 1 0

Or to an experiment involving various parameters for the RTO and the elephant threshold

cd experiments
./run_tracks_varparam.sh one 1110 10 7000 1000 conf/client_config_oneWEB.txt 172.16.0.1:8001 XMLRPC 1 28 0 0 0 1 10 10000 10000000

For more details on the experiments, refer to the traffic generator installation at [Doc]

#Feedback I always welcome and love to have feedback on the program or any possible improvements, please do not hesitate to contact me by commenting on the code Here or dropping me an email at [email protected]. PS: this is one of the reasons for me to share the software.

This software will be constantly updated as soon as bugs, fixes and/or optimization tricks have been identified.

This software including (source code, scripts, .., etc) within this repository and its subfolders are licensed under CRAPL license.

Please refer to the LICENSE file [CRAPL LICENCE] for more information

The Copyright of this repository and its subfolders are held exclusively by "Ahmed Mohamed Abdelmoniem Sayed", for any inquiries contact me at ([email protected]).

Any USE or Modification to the (source code, scripts, .., etc) included in this repository has to cite the following PAPERS:

1- Ahmed M. Abdelmoniem and Brahim Bensaou, “Curbing Timeouts for TCP- Incast in Data Centers via A Cross-Layer Faster Recovery Mechanism, in Proceedings of IEEE INFOCOM 2018, Honolulu, HI, USA, Apr-2018.

2- Ahmed M Abdelmoniem, Brahim Bensaou, "End-host Timely TCP Loss Recovery via ACK Retransmission in Data Centres", Technical Report, HKUST-CS17-02, Hong Kong, 2017.

Notice, the COPYRIGHT and/or Author Information notice at the header of the (source, header and script) files can not be removed or modified.

To understand the framework and proposed solution, please read the paper [T-RACKs INFOCOM paper PDF] and technical report [T-RACKs Tech-Repo PDF]