Abstract
Protocol-independent redundant traffic elimination (RTE)
at the network layer is a method of detecting and removing
redundant chunks of data from data packets using
caching at both ends of a network link or path. In this
paper, we propose a set of techniques to improve the
effectiveness of packet-level RTE. In particular, we consider
two bypass techniques, with one based on packet
size, and the other based on content type. Both bypass
techniques are effective in reducing the processing
requirements of RTE, with little or no adverse impact
on redundancy detection. The bypass techniques apply
at the front-end of the RTE pipeline. Within the RTE
pipeline, we propose chunk overlap and oversampling
as techniques that can improve redundancy detection,
while obviating the storage and processing requirements
associated with chunk expansion at the network endpoints
as suggested by previous research. Finally, we
propose savings-based cache management at the backend
of the RTE pipeline, as an improvement to the commonly
used FIFO-based cache management. We evaluate
our techniques on full-payload packet-level traces
from a university environment. Our results show that
the 11-12% savings achieved with typical RTE can be
improved to 16-18% with our techniques.
Refereed
No
