Host Compatibility


  • Sometimes, servers are overloaded causing browsing sites hosted on them very slow or server time outs.


  • Problems may occur with sites bigger than 450MB.


BlueHost hosting seems to be somewhat hit and miss. Some customers have found that BlueHost is a bit slow and often returns 404 and 500 server error messages for no reason. These can brake MainWP backup / clone functionality.
PHP memory limit is 128MB at MOST. This can be considered as low. Some other hosts provide 256MB which is double.
Bluehost requires your username as a prefix for database name (and user), so to be of the form username_databasename.
Sometimes MainWP can time out during a backup / clone process, to resolve this we recommend editing your php.ini file to change max execution time to 600.
These are the limits on how long a process can run before being killed off and are based on whether the customer has a dedicated IP address or uses the shared one.

  • Apache/Web (HTML/PHP/Downloads): With Dedicated IP: 12 Hours | Without: 10 Minutes (up from 5 minutes)
  • SSH/Shell: With Dedicated IP: 2 Hours | Without: 1 Hour
  • Cron Jobs: With Dedicated IP: 30 Minutes | Without: 30 Minutes
  • Deamons: With Dedicated IP: Unlimited | Without: 10 Minutes


  • No cPanel.

Digital Ocean


  • Reports that cURL does not come pre-installed on droplets so you will need to install it in order to connect a Child site



  • HTTP Loopbacks are not allowed (PHP connects back to site via curl to Site URL).
  • “Unlimited” is not truly unlimited. Storing backups in your account is PROHIBITED by unlimited plans terms of service.
  • Resource related:
    • Extremely slow zip generation.
    • Problems may occur with sites above 22mb (limit can be increased with zip compression turned off) due to slow processing.
    • Possible workaround: Extend php timeout in php.ini file to increase MainWP run-time.
  • Uses custom control panel (No cPanel).
  • Configuration related:
    • No native command-line zip.
    • Procwatch automatically kills off MainWP if it uses too many resources while creating a backup or clone.


  • You need to verify your mysql server as it may not be the common default localhost (important for cloning and migrating process).



  • Custom control panel (No cPanel). Some changes take up to hours to take effect.
  • On some servers slow site load time can occur.
  • Some servers overloaded not leaving processing power for backups or clones.
  • System kills any PHP process working too long or too hard (ie backup / clone process).



  • Fast.
  • Command-line zip available for best MainWP experience.
  • cPanel.


  • Max PHP runtime limit is 30 seconds for shared hosting.

Current limits of reseller and shared hosting (9/20/2011):

  • safe mode = Off (cannot adjust)
  • memory_limit = 64M (MAXIMUM)
  • max_execution_time = 30 (MAXIMUM)
  • max_input_time = 60 (MAXIMUM)
  • post_max_size = 64M (MAXIMUM)
  • upload_max_filesize = 64M (MAXIMUM)
  • enable_dl = Off (cannot adjust)

Heart Internet

  • Does not allow loopback connections so your Dashboard and Child need to be on separate servers


  • Dev team tested and No issues reported


  • Minimal issues.
  • Linux command line zip is not supported.


  • Minimal issues.


  • Command line ZIP is blocked by this host.


  • Reports of them automatically quarantining plugin files causing major issues. Can be resolved by contacting their support and asking them to remove the quarantine.

Rackspace Cloud Hosting

  • Failing path/directory detection may occur due to symlink issues. (Prevents backups and cloning)
  • We cannot accurately report the status for Cloudsites hosting.


  • It’s recommended to add the following to your .htaccess
  • Blocked command line zip via PHP exec().
  • Downloading of backup files via web is disabled for enhanced security purposes. This will also affect cloning
  • UpdraftPlus plugin not working properly so the MainWP UpdrafPlus extension may have issues with this hosting

  • 1and1
  • BlueHost
  • BlueRazor
  • Digital Ocean
  • Dreamhost
  • GoDaddy
  • Hostgator
  • Heart Internet
  • InMotionHosting
  • IPower
  • IPowerWeb
  • JustHost
  • Netsons
  • Rackspace Cloud Hosting
  • WPEngine