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Article ID: 114326, created on Jul 10, 2012, last review on Oct 10, 2014

  • Applies to:
  • Operations Automation 5.4


How does Linux Shared Hosting NG work?


This article provides information about Linux Shared Hosting NG in Parallels Operations Automation (POA):

  • General information about NG Hosting
  • Best practices
  • Known issues
  • Troubleshooting techniques

NG Cluster Architecture

The following picture illustrates the general NG Cluster architecture: servers, their roles, the links between them, and data flow.

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The simplified scheme of request processing in NG hosting is illustrated below:

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NG Cluster servers and services

#114327 NG Load Balancer

#114328 NG Caching Server

#114331 Apache NG module

#114332 Director

#114333 Configuration Database (CDB) server

#114334 NSS Plug-ins

#114335 Web servers

#114336 NFS Shared Storage

#114337 CloudLinux LVE features


#114349 Linux Shared Hosting NG Limitations


#114350 Custom quota management scripts

#114351 Custom Load Balancer scripts

#114353 Custom Web Server scripts

#114354 Custom php.ini

Resource Configuration

#114397 Resource Configuration

Migration from Standard Linux Shared Hosting

#114400 Migration

Known issues

#114407 Known Issues


#114384 General Troubleshooting Guidelines

#114406 PHP Issues

#121938 Service 'nscd' start causes inaccessibility of NG web-sites

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