[Pvfs2-developers] pvfs layout

[Sam Lang]

Hey all,

Here's a patch that adds a layout parameter to sys_create.  The idea  
is that users may want to specify exactly which servers are chosen  
for a file to be distributed over, or use an algorithm (like in-order  
round-robin).  So in the layout structure, a layout algorithm must be  
defined.  The current algorithms are:

none:  order the datafiles according to the server list.
round-robin:  choose the first server randomly, and round-robin in- 
order of the server list.
random:  order the datafiles randomly (with unique servers).
list:  provide an exact list of servers

For the list algorithm, a separate list structure must be specified,  
which is a count of servers and their BMI address references.  The  
patch includes functions to get all the server BMI addresses and map  
them to hostnames.

Let me know what you think.

-sam


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