Boosting Streaming Video Delivery with WiseReplica - Transactions on Large-Scale-Data-and Knowledge-Centered Systems XX - page 43

Fig. 2. Storage domains.

infrastructure properties to WiseReplica: replication group and hop limit. The
replication group allows WiseReplica to adapt video replication for smaller sets
of peers, most likely connecting customers with similar content interests. By
enforcing a hop limit, storage domains avoid jitter, ensure low latencies, and
permit WiseReplica improving the eciency of network resource provision.
In addition, we assume that a storage domain enforces an initial placement
policy. This policy defines the minimum replication degree

for initial copies
for any new, just fetched Internet video. Request scheduling is simple. A view
request is served by at most

m

R nodes with uniform load. Available sources come

from r = min ( n, R ), where n is the number of current replicas. In this work, we

consider equals to five as default settings. For requests

scheduling, this approach enforces well-known policies for peers in edge networks,
including nearest source selection and multi-sourcing.

m equals to two and R

4.2 Self-Adapting Replication According to the Ranking of Internet
Videos

Our utmost goal is to contribute to meet increasing customers expectation on
Internet videos using peer-assisted VoD systems. To enhance VoD delivery, we
assume that rebuffering is a major issue to be addressed. We propose to cope with
this issue by enforcing minimum average bitrate of each streaming as the main
QoS metric. In this scenario, content and CDN providers must be committed
to enforce minimum average bitrate for videos through SLA contracts. Since