ZXTM GLB 2.0 -> 28th June 2007
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ZXTM Global Load Balancer provides datacenter load balancing and
failover by managing DNS responses.  Clients are directed to the
optimal datacenter based on availability, performance
and geographic proximity.

This is the first public release of ZXTM GLB.


Key Features in ZXTM GLB 2.0
--------------------------------

GLB Services:
   It is possible to specify different settings for each group of
   domains that are being handled. TTLs, health monitoring and load
   balancing may all be set independently.

Load Balancing:
   ZXTM GLB uses datacenter availability, performance and
   geographic location to determine the appropriate destination
   datacenter for each client request.  Load balancing may be
   entirely performance driven, location driven, or a varying
   combination of both.

Active-Passive Configuration:
   You may configure the order in which datacenters provide backup for
   each other. It is also possible to prevent automatic recovery,
   which is important for stateful web applications.

Monitoring:
   A catalog of monitors is provided to aid management of multiple
   monitors. A variety of monitor types are suppported, including
   DNS, ping monitors and HTTP-based monitors. These may be applied to
   any GLB service and as many monitors as required may be applied.

SOAP API:
   Through the provided SOAP interface, it is possible to write
   external daemons to inform ZXTM GLB about the load of each
   datacenter. It is also possible to set the appropriate machine as
   the active machine to help with scripting disaster recovery.

Visualization:
   There is a rich set of visualization tools to help analyze the
   performance and operation of your services. To visualize the
   geographic distribution of requests, the map page will show in
   real-time the locations where requests came from. To visualize
   the rates of requests you can interactively view graphs of the
   current activity and for a longer term view you can view graphs
   of historical activity.


Supported Platforms
-------------------

ZXTM GLB 2.0 can be installed on the following platforms:

 * Linux (x86, x86_64)

Web browser support (for the online administration interface):
The following browsers have been tested with ZXTM GLB:

 * Firefox 1.5+
 * Internet Explorer 7