We were discussing Riverbed Operating System (RiOS) technical concepts. We were discussing the proxy file service which can improve performance by deferring current requests or permitting certain operations even if WAN connectivity is disrupted. PFS is an integrated local file server with support for disconnected operations and replication. It has a separate dedicated portion of disk space and does not interfere with the data streamlining activities with the remote server. This does not require any server side agent like Windows CIFS does and PFS works with any kind of host. Because its an optional feature it is not disruptive to the existing streamlining functions. Since PFS works as a local file server, it supports disconnected operations. Since it works in a dedicated mode, it can support replication to and from the remote datacenter. These are complementary to the benefits offered by the prediction and pre-population in the regular connections. In other words, the support for disconnected operations is in addition to the high performance acceleration system without the data integrity and communication issues of caching. PFS also schedules automatic updates of the  PFS shares on appliances, requiring no administrative oversight.
Next we look at high-availability clustering. This is helpful when deploying more than one RiOS devices in place of the existing RiOS device for high availability.  If the devices are place in series, then they take advantage of the fact that RiOS passes through unoptimized traffic when its performance limit is reached, handing over the opportunity to optimize the passed through traffic to the next member of the serial cluster.
#codingexercise


Double  GetNthRootProductOddRaisedPtimesQAndEvenRaisedPtimesQ (Double [] A,Double  p, Double q)


{



If ( A== null) return 0;



Return A.NthRootProductOddRaisedPtimesQAndEvenRaisedPtimesQ(p, q);



}