Sunday, May 31, 2015

We were discussing Riverbed Operating System (RiOS) technical concepts. we now review connection pooling and SSL acceleration. Applications open many connections during their execution. Many of these are short-lived yet they require significant overhead to initiate communications. If for example, the loading of a webpage requires a client to open TCP connections, then each slows down the application. RiOS can maintain a pool of open connections for these purposes. Here the connections are already open and there is no overhead associated with using one. Each such pre-opened connection is ready for data transfer and is not considered dirty from previous use. Connection pooling can improve on overheads by as much as 50%.
In addition to connection pooling, another common practice is the use of SSL with application connections. SSL comes with different trust models. RiOS can accelerate SSL traffic while letting private keys be held in the data center and without requiring fake certificates. Both the RiOS appliance and client can auto-discover their peers and begin optimizing SSL traffic. RiOS also provides central management of SSL acceleration capabilities.  Allowing the organization to use their own certificate with their SSL connections and not require them to keep fake certificates or server private keys in branch offices makes RiOS flexible and improves the security. RiOS only distributes temporary session keys to branch office appliances.
RiOS optimizes both http and https traffic. For static web content, a "learning mechanism" allows the RiOS clients to track the objects that are requested for particular web page and accelerate future requests by using the learned information and pre-fetching associated content. In addition, the learned information is sent in parallel for normally sequential data creating additional optimization benefits.
#codingexercise
Double  GetNthRootSumOddRaisedPDividedQAndEvenRaisedPTimesQ (Double [] A,Double  p, Double q)
{
If ( A== null) return 0;
Return A.NthRootSumOddRaisedPDividedQAndEvenRaisedPTimesQ(p, q);
}

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