salbnet: Self-Adapting Load Balancing Network
Server Load Balancing (SLB) is an efficient way to provide scalable,
flexible and fault tolerant services.
The server load balancing with salbnet is application
independent and credit based. Backend server report credits to the load
balancer. The credits represent the maximum number of requests which a
back end server is able to handle.
The salbnet implementation includes different credit
reporting algorithms and credit based schedulers. A scheduler considers
a server only if credits are available. Thus the servers limit the work
they will get (self-adapting).
The salbnet implementation is done in ANSI C and consists
of several components: salbd a daemon for credit gathering and
reporting, libnetmsg a library for sending messages over
Ethernet and InfiniBand networks and libnethook a library for
hook into socket syscalls.
salbnet is a proof of concept
research project and all components are
considered experimental and therefore may never be released to the
public. Nevertheless there is a further tool originated from
salbnet research: servload a
service benchmark for HTTP and DNS performance evaluation.
Publications
Research Publications related to salbnet and
servload:
J. Jung, S. Kiertscher, S. Menski, and B. Schnor, Self-Adapting
Load Balancing for DNS
, Journal of Networks,
10 (4), pp. 222–231, April 2015.
J. Jung, S. Kiertscher, S. Menski, and B. Schnor, Self-Adapting
Load Balancing for DNS
, Proc. 17th Int'l Symp. on
Performance Evaluation of Computer and Telecommunication Systems
(SPECTS 14), 46, pp. 564–571, July 2014.
J. Jung, B. Schnor, and S. Menski, salbnet: A Self-Adapting Load
Balancing Network
, Proc. 12th IASTED Int'l Conf. Parallel
and Distributed Computing and Networks (PDCN 14),
pp. 249–257, February 2014.
J. Zinke and B. Schnor, The Impact of Weights on the Performance
of Server Load Balancing Systems
, Proc. 16th Int'l Symp.
on Performance Evaluation of Computer and Telecommunication Systems
(SPECTS 13), 45, pp. 541–548, July 2013.
J. Zinke, J. Habenschuß, and B. Schnor, servload: Generating
Representative Workloads for Web Server Benchmarking
, Proc.
15th Int'l Symp. on Performance Evaluation of Computer and
Telecommunication Systems (SPECTS 12), 44,
pp. 82–89, July 2012.
J. Zinke, B. Schnor, and S. Kiertscher, System call tracing
overhead
, Proc. Int'l Linux System Technology Conf. and
OpenSolaris Developer Conf., UpTimes 2/2009,
pp. 157–166, October 2009.
J. Lehmann, L. Schneidenbach, B. Schnor, and J. Zinke,
Self-Adapting Credit Based Server Load Balancing
, Proc.
7th IASTED Int'l Conf. Parallel and Distributed Computing and
Networks (PDCN 08), pp. 55–62,
February 2008.