Sharing one file in a cluster

muath Dec 5, 2005 7:25 AM

Hello,

I have two clustered nodes with apache load balancing. I want to share a file between them. The file is created as a report based on user request and then it is downloaded to the user. The problem here is when a software failure happens. In this case I want the file to be trasparently downloaded again to the user from the other node. Is this possible? If no then what is the best altarnative solution?

Thanks you.

1. Re: Sharing one file in a cluster

manik Dec 5, 2005 7:37 AM (in response to muath)

Hi

Where is the file stored when it is created? Some options may be:

- Put the file in a database table (as an object or byte array) so it can be accessed by all nodes in a cluster

- Put the file on a shared filesystem (NFS, Samba, etc) and have each node look up the file on disk

- Either of the above + put the file in a replicated cache.

The option you choose will depend on a number of factors:

- How large is each file typically?
- How many different files do you have?
- How often is the same file accessed?

Answering these questions will help you gauge the viability of disk/JDBC access, in addition to caching the file in memory and replicating it across nodes.
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