YBOX High Availability Configuration Samples
High availability is defined as a website or web
service that is aimed to available for 100% of the time. Before
configuring such a system, it is essential to keep in mind on the
following factors
1. Cost
2. Hardware / Software
3. Back Up
4. Geographical Distribution of servers
5. Type of content that is
delivered
6. User Base
Firewall
Traffic from the internet is
analysed and filtered via CISCO Pix firewall. The max sessions and
thorough put of the firewall is designed based on the user base and
scalability required in the future.
Load Balancers
This is primarily to distribute load among the nodes in the
cluster. Web / Apps servers in particular.
Web/Apps
Servers
This is a fully scalable cluster of web and
apps servers. It is designed in such a wat that a new node can be
added to the cluster on the fly without any down time.
Gigabit private network
The Web / Apps server connects
to the database server via private network. Connectivity with gigabit
speed makes the access to database cluser as if it is on the same
machine without any latency.
Database Clusters
No direct connection to the database server is allowed except from
the application layer. Database clusters are high end monster servers
with RAID 10 minimum configuration.
Backup
Fully scalable NAS / Storage Cloud.
Note : The above schema
is a typical sample of a high availability configuration. Certain
components can be added or removed based on the customer's input.
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