High reliability web server - cluster, redundancy, etc Post: 302301982

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Special Forums UNIX and Linux Applications High Performance Computing High reliability web server - cluster, redundancy, etc Post 302301982 by bsaadmin on Sunday 29th of March 2009 04:29:48 PM

03-29-2009

Registered User

High reliability web server - cluster, redundancy, etc

Hi. I am IT manager/developer for a small organization. I have been doing as-needed linux server administration for several years and am by no means an expert. I've built several of my own servers, and our org is currently using hosting services for our servers and I am relatively happy.

We recently had an outage at the host, and management has made clear that this is unacceptable. Our host is one of the larger ones, a publicly traded company, and their techs are onsite and knowledgeable. The outage was a problem with the pipe between the hosting company and the backbone to the internet, caused by the hosting company's pipe provider. It lasted about 25 minutes. Just FYI.

So the conversation about redundancy and clusters has begun. I have never done this before. My hosting company offers a cluster plan that would be easy to implement (CPanel based) but that won't solve the problem of a pipe outage. We are thinking of clustered web servers (apache, php) and clustered databases (mysql) in different locations geographically. Wha are the considerations involved? Rough idea of costs, risks that remain, etc.

Any direction would be really appreciated.

bsaadmin

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postgresql-setup

POSTGRESQL-SETUP(1)					    Postgresql RPM-dist manual					       POSTGRESQL-SETUP(1)

NAME

       postgresql-setup - manual page for postgresql-setup 9.2.7

SYNOPSIS

       postgresql-setup {initdb|upgrade} [SERVICE_NAME]

DESCRIPTION

       Script is aimed to help sysadmin with basic database cluster administration.

       The  SERVICE_NAME  is used for selection of proper unit configuration file; For more info and howto/when use this script please look at the
       docu file /usr/share/doc/postgresql-9.2.7/README.rpm-dist.  The 'postgresql' string is used when no SERVICE_NAME is explicitly passed.

   Available operation mode:
       initdb Create a new PostgreSQL database cluster.  This is usually the first action you perform after PostgreSQL server installation.

       upgrade
	      Upgrade PostgreSQL database cluster to be usable with new server.  Use this if you upgraded your PostgreSQL server  to  newer  major
	      version (currently from 8.4 to 9.2).

ENVIRONMENT

       PGSETUP_INITDB_OPTIONS
	      Options  carried	by this variable are passed to subsequent call of `initdb` binary (see man initdb(1)).	This variable is used also
	      during 'upgrade' mode because the new cluster is actually re-initialized from the old one.

       PGSETUP_PGUPGRADE_OPTIONS
	      Options in this variable are passed next to the subsequent call of `pg_upgrade`.	For more info about possible options  please  look
	      at man pg_upgrade(1).

       PGSETUP_DEBUG
	      Set to '1' if you want to see debugging output.

postgresql-setup 9.2.7						     June 2014						       POSTGRESQL-SETUP(1)