the art of scalability scalable web architecture processes and organizations for the modern enterprise phần 7 potx

... demand fore- cast and handing it off to the person responsible for capacity analysis and planning. The capacity planner takes a look at the types of demand forecasted by the business unit and ... may be the purchase of new systems, a change in the architecture of certain components of the platform, such as the data model or the movement of demand from one...

Ngày tải lên: 14/08/2014, 17:21

... that the CTO creates and runs are the lifeblood of the business units and the heart of the back office systems that the CFO needs to do his or her job. We have indicated that the CTO’s organizations ... vision are the CTO’s peers the people who rely on the CTO for either the availability of the product or the back office systems that run the company....

Ngày tải lên: 14/08/2014, 17:21

... that there is a ben- efit in thinking about the differences in actions for the restoration of service and the resolution of problems. The Components of Incident Management The ITIL defines the ... consider improving the process. These signs are derived from the three purposes of processes. The first is if there is repetitive management of the same task. Reca...

Ngày tải lên: 14/08/2014, 17:21

... some form of the RASCI model, you may also decide to require that the appropriate A, or owner of the system in question, has signed off on the change and is aware of it. The primary reason for the ... the end of several hours, each of the teams presents their Venn diagram for several minutes, each including the reasons for choosing each of the principle...

Ngày tải lên: 14/08/2014, 17:21

... 2 47 decide on green, yellow, or red by analyzing various factor such as the difficulty of the task, the amount of effort required for the task (the more effort generally the higher the risk), the ... administrators, and other JAD members; therefore, a very informal setting is our preference. The formality should come from the fact that there will be a go or no-go...

Ngày tải lên: 14/08/2014, 17:21

... successful scalability of your system and the adoption of the performance and stress testing processes. As we cautioned previously in the discussion of the stress test, the creation of the test ... tradeoff. This process of listing out the tradeoffs, determining pros and cons, and then analyzing each one is the second method of performing a tradeoff anal...

Ngày tải lên: 14/08/2014, 17:21

... the time of the request by looking up the username and determining the password or performing a geo-location test of the requestor IP address, we have performed a z-axis split. For the sake of ... exception of the customers for whom we have no sales data and therefore just represent a contact list. This set of customers actually represents the largest group b...

Ngày tải lên: 14/08/2014, 17:21

... abstrac- tion of the layered model of network architecture. It is used to describe the different compo- nents of the network and how they are interrelated. There are seven layers, and starting from the ... the “avail- ability” of the string of lights was the product of the availability (1 the probability of failure) of all the lights. If any light had a...

Ngày tải lên: 14/08/2014, 17:21

... contains the copy for which it is a master (33% of the data necessary to run the site) and 50% of the copies of each of the other sites (16.5% of the data necessary to run the site for a total of an additional ... over time for the purposes of comparison. We can compare the rates of errors for each of our services by error type for the time o...

Ngày tải lên: 14/08/2014, 17:21

... development, 275 – 277 Agile Manifesto, 275 – 277 ARBs, 274 code reviews, 274 cowboy coding, 277 definition, 274 examples, 274 – 275 hybrid development models, 278 performance testing, 275 production ... 365–3 67. See also Z-axis splits, databases. summary of, 3 67 370 AKF Scale Cube for databases, uses for back office IT systems, 372 – 373 ecommerce, 370 – 372 ERP (enterpr...

Ngày tải lên: 14/08/2014, 17:21