Why do people live in clusters?
476038
safety in numbers....(think of clans).....centrally located resources....and humans are social creatures....usually depend on interaction to stay sane
875935
People migrate for economic reasons, better livelihood, better healthcare, better education, basically progression in life.\n\nThe advantage is that people send money home and people develop new skills abroad that may better the people
482952
The technology is called clustering.\n\nHere's a good page for general information regarding clustering for both computational and high availability purposes:  http://lcic.org/\n\nQuick and easy way to build your own cluster: http://idea.uab.es/mcreel/ParallelKnoppix/\n\nCreative use of clustering: http://www.accrc.org/cluster/
1023078
Mostly they don't want to come here. They'd much rather be able to make a living and support their families in the countries of their origin. As far as those that do come here are concerned, they would also rather not have to live on run-down, inner city housing estates full of junkies and thieves.
62231
Actually, as stated in the Niche Theory, living space is also a resource. If they do not share the same living space, they're not sharing all the resources, thus, there would be no competition among them.
959409
There are 2 explanations:\n\n(1)  Because that's where people tend to drop food & crumbs, as they are walking along.\n\n(2)  They don't really congregate there, especially --they just seem to, because that's where you can see them.   They congregate in the grass, too, and maybe in other places --but they're not as easy to see there.
603347
i know one family that has 20 people...i'd go insane if i had to live with that many. they live with aunts, uncles, cousins most of them are married and have children. they also have grandparents living with them.
657054
Don't feel bad, a lot of people who live in ghettos\nwant to crack other peoples f-ing heads.\nIt's a natural tendency brought on by the\nenvironment of ghetto living.
1104229
We are all loonies ......or twoonies in your case :-)!\n\nSeriously there could be all kind of reasons.It is fun and very addictive etc.....I think lots of people are kind of lonely or looking for kicks (looking around the 360s...). Some people might be introverts and prefer communicating anonymously or they have a job at home/stuck in a boring work and don't interact with many people so it is a kind of window into the world.\nSome I think just like the idea of exchanging views/jokes with people across the world and from various backgrounds. Personally I am a bit stuck at the moment and definitely prefer mixing outside with real people.....especially during the summer. I certainly prefer being among people I can see, hear, view their reactions etc.\nSome look for other things....knowledge...inspirations.\nThere could be a multitude of reasons and I would not be judgemental too quickly.
533341
strangely, these are the places that provide the most heat. Most people would rather bask n the sun and risk a natural disaster than sit at home in the cold forever.
853061
In a computernetwork all the systems may be physically avaialble in an area which covers it. In a distributed system environment physical presence pays less importance.
855859
Cluster surveys are a type of cluster sampling, used to try and represent a large demographic by taking a small part of it. For example, in the mortality survey in Iraq that used Cluster Sampling, they defined various types of areas that should be sampled, then randomly picked a number of areas that met the various criteria (clusters). Then they randomly surveyed people living within that area.
299306
Hard to think of many.  I suppose it keeps the population density down somewhat in a given area.  This leads to less skirmishes between neighbors, or at least one might think so.\n\nInfrastructure resources (roads, transportations systems, buildings) aren't as tightly packed, which allows for some degree of future expansion.  Current designs typically design in more green space for water drainage and buffering, noise reduction and aesthetics.
509729
Because affluent people tend to socialize around activities, like sailing or tennis, and can afford to travel and pay for those activites, while people with modest incomes make do with the people around them.\n\nNeither is better than the other - the poorer people have a greater sense of community in the immediate nearby sense, while the affluent people combine their business networking in with things they like to do, because they can afford to.\n\nAt least, that's the way I see it.
560511
People migrate because the condition they are living is hard to tolarate. If they have a opportunity to migrate to place they heard better, they will migrate.\n\nTo increase quality of life.\nTo earn more money ( depending on which country they migrate from)\nTo live in an safer environment.
69345
Clustering is grouping machines together to transparantly provide enterprise services.\nThe client does not now the difference between approaching one server or approaching a cluster of servers.\nClusters provide two benefits: scalability and high availability\n\nJ2EE application server vendors define a cluster as a group of machines working together to transparently provide enterprise services (support for JNDI, EJB, JSP, HttpSession and component failover, and so on). They leave the definition purposely vague because each vendor implements clustering differently. At one end of the spectrum rest vendors who put a dispatcher in front of a group of independent machines, none of which has knowledge of the other machines in the cluster. In this scheme, the dispatcher receives an initial request from a user and replies with an HTTP redirect header to pin the client to a particular member server of the cluster. At the other end of the spectrum reside vendors who implement a federation of tightly integrated machines, with each machine totally aware of the other machines around it along with the objects on those machines.\n\nIn addition to machines, clusters can comprise redundant and failover-capable:\n\n    * Load balancers: Single points of entry into the cluster and traffic directors to individual Web or application servers\n    * Web servers\n    * Gateway routers: Exit points out of an internal network\n    * Multilayer switches: Packet and frame filters to ensure that each machine in the cluster receives only information pertinent to that machine\n    * Firewalls: Cluster protectors from hackers by filtering port-level access to the cluster and internal network\n    * SAN (Storage Area Networking) switches: Connect the application servers, Web servers, and databases to a backend storage medium; manage which physical disk to write data to; and failover\n    * Databases\n\nRegardless of how they are implemented, all clusters provide two main benefits: scalability and high availability (HA).\n\nScalability\nScalability refers to an application's ability to support increasing numbers of users. Clusters allow you to provide extra capacity by adding extra servers, thus ensuring scalability.\n\nHigh availability\nHA can be summed up in one word: redundancy. A cluster uses many machines to service requests. Therefore, if any machine in a cluster fails, another machine can transparently take over.\n\nA cluster only provides HA at the application server tier. For a Web system to exhibit true HA, it must be like Noah's ark in containing at least two of everything, including Web servers, gateway routers, switching infrastructures, and so on. (For more on HA, see the HA Checklist.)\n\nCluster types\nJ2EE clusters usually come in two flavors: shared nothing and shared disk. In a shared-nothing cluster, each application server has its own filesystems with its own copy of applications running in the cluster. Application updates and enhancements require updates in every node in the cluster. With this setup, large clusters become maintenance nightmares when code pushes and updates are released.\n\nIn contrast, a shared-disk cluster employs a single storage device that all application servers use to obtain the applications running in the cluster. Updates and enhancements occur in a single filesystem and all machines in the cluster can access the changes. Until recently, a downside to this approach was its single point of failure. However, SAN gives a single logical interface into a redundant storage medium to provide failover, failback, and scalability. (For more on SAN, see the Storage Infrastructure sidebar.)\n\nWhen comparing J2EE application servers' cluster implementations, it's important to consider:\n\n    * Cluster implementation\n    * Cluster and component failover services\n    * HttpSession failover\n    * Single points of failure in a cluster topology\n    * Flexible topology layout\n    * Maintenance
723629
Reduce volunarability to economic risk\nIncreases social relations among groups in clusters\n Provides food security