Large Scale Data Processing

Today's applications generate and consume large amounts of data. This fact drives the need for developing systems that efficiently store and process large volumes of data. Taking advantage of cluster computing, large scale data processing systems distribute large data sets on the cluster nodes, where they are processed in parallel. Parallel database systems and MapReduce tools are representatives of this category. There is also much interest nowadays in systems that attempt to combine them (Greenplum, Aster Data, HadoopDB).

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Welcome to the Sandbox web

The Sandbox web is the sandbox you can use for testing. Everybody is welcome to add or delete some stuff. It is recommended to walk through the TWikiTutorial to get a jumpstart on the TWiki tool. A good rule of thumb is to add at the end of the page and sign and date it with your WikiName.

Test Topics

Create a new document by name: (Use a topic name in WikiNotation)
 

Create a new auto-numbered test topic:

Recently changed topics

%SEARCH{ ".*" regex="on" nosearch="on" nototal="on" order="modified" reverse="on" limit="7" format="

$topic

$summary
$date - $wikiusername

"}%

Sandbox Web Utilities

Results from Sandbox web retrieved at 00:54 (GMT)

See also the faster WebTopicList

• Sandbox Web
• Create New Topic
• Index
• Search
• Changes
• Notifications
• Statistics
• Preferences

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This is a subscription service to be automatically notified by e-mail when topics change in this Sandbox web. This is a convenient service, so you do not have to come back and check all the time if something has changed. To subscribe, please add a bullet with your WikiName in alphabetical order to this list:

• TWikiGuest - example@your.company

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Related topics: WebChangesAlert, TWikiUsers, TWikiRegistration

Sandbox Web Preferences

The following settings are web preferences of the Sandbox web. These preferences overwrite the site-level preferences in TWiki.TWikiPreferences and Main.TWikiPreferences, and can be overwritten by user preferences (your personal topic, eg: TWikiGuest in the Main web).

Web Preferences Settings

These settings override the defaults for this web only. See full list of defaults with explanation.

• Web Settings:
  • Set WEBBGCOLOR = #B9DAFF
  • Set SITEMAPWHAT = Sandbox test area with all features enabled.
  • Set SITEMAPUSETO = ...experiment in an unrestricted hands-on web.
  • Set SITEMAPLIST = on

• Default template for new topics for this web:
  • WebTopicEditTemplate: Default template for new topics in this web. (Site-level is used if topic does not exist)
  • TWiki.WebTopicEditTemplate: Site-level default topic template

• Comma separated list of forms that can be attached to topics in this web. See TWikiForms for more information.
  • Set WEBFORMS =

• Users or groups who are not / are allowed to view / change / rename topics in the Sandbox web: (See TWikiAccessControl). Remove the # to enable any of these settings. Remember that an empty setting is a valid setting; setting DENYWEBVIEW to nothing means that anyone can view the web.
  • #Set DENYWEBVIEW =
  • #Set ALLOWWEBVIEW =
  • #Set DENYWEBCHANGE =
  • #Set ALLOWWEBCHANGE = TWikiAdminGroup
  • #Set DENYWEBRENAME =
  • #Set ALLOWWEBRENAME = TWikiAdminGroup

• Users or groups allowed to change or rename this WebPreferences topic: (e.g., TWikiAdminGroup)
  • #Set ALLOWTOPICCHANGE = TWikiAdminGroup
  • Set ALLOWTOPICRENAME = TWikiAdminGroup

• Web preferences that are not allowed to be overridden by user or topic preferences:
  • Set FINALPREFERENCES = NOSEARCHALL, ATTACHFILESIZELIMIT, WIKIWEBMASTER, WEBCOPYRIGHT, WEBTOPICLIST, DENYWEBVIEW, ALLOWWEBVIEW, DENYWEBCHANGE, ALLOWWEBCHANGE, DENYWEBRENAME, ALLOWWEBRENAME

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Statistics for Sandbox Web

Notes:

• Do not edit this topic, it is updated automatically. (You can also force an update)
• TWikiDocumentation tells you how to enable the automatic updates of the statistics.
• Suggestion: You could archive this topic once a year and delete the previous year's statistics from the table.

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• LSDP
• PluginTestEmptyPlugin
• WebAtom
• WebChanges
• WebHome
• WebIndex
• WebLeftBar
• WebNotify
• WebPreferences
• WebRss
• WebSearch
• WebSearchAdvanced
• WebStatistics
• WebTopicCreator
• WebTopicList

See also the verbose WebIndex.