What is replication?
Replication is an industrial process where your DVD-R or in some cases DLT tape is used to create a glass master. That glass master is then used to physically stamp copies out like a cookie cutter. Those replicated DVDs are as compatible as any DVD you buy in the store. The downside is cost. Most replicators require a minimum run of at least 500 and you can expect total costs to be at least $1,000. See www.dub-it.net for some example pricing.
Why is replication “vital to science”? How are operational definitions helpful? Replication is vital to science. It helps make science a self-correcting system. Any time a result is surprising, researchers will try to replicate it, to see if the phenomenon is dependable or just a fluke (a one-time occurence). Operational definitions are critically important in aiding replication. Why? An operational definition spells out exactly how to measure something. To replicate an experiment, one must know how the original researcher performed measurements. Hence operational definitions must be known, and known precisely, in order to replicate research. What are common reasons a replication fails? If a surprising result from research cannot be replicated, that does not mean somebody lied or cheated. Most scientists are honest, and most non-replicated research is due to some difference in the way the research was performed, differences the subjects involved, or other details (perhaps the weather,
Replication creates an environment that allows multiple copies of the same information to be distributed to multiple databases throughout your enterprise. Replication has the following benefits: • Data is closer to the user. • It removes the impact of read-intensive OLAP (online analytical processing) environments from the transaction-intensive OLTP (online transaction processing) environments. • It reduces conflicts between multiple sites trying to work with the same information. • Database sites can operate autonomously with the replicated data. This means that they can define their own rules, procedures, and views on their copy of the data. There are two basic types of replication: replication and distributed transactions. Both types of replication allow you to keep the different copies of your data current. You can even use both strategies at the same time in your environment. Replication duplicates and distributes copies of your data to the different locations in your environment.
Replication is the server process of copying data modifications from one location to another. The main characteristics of replication which make it appealing are: • The unit of replication is a transaction, not just an individual sequel (SQL) statement. • Replicated transactions are applied in the same order as they occurred on the primary side. • The replication system is able to detect whether a network connection is temporarily offline and when the component is available again. When a disruption like this occurs, the replication process should continue functioning without having to be adjusted. Although the replication server is powerful and flexible, it is not easy to administrate. Another contributing factor is that the scope and complexity of the database administrator’s job expands significantly when replication is involved. The previously independent data servers are now closely related because data is replicated between them. This effectively means that the data servers have b
An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.
