Re: [Boost-users] boost C++ load data from file

Subject: Re: [Boost-users] boost C++ load data from file
From: Binglong Xie (binglongx_at_[hidden])
Date: 2010-07-12 23:24:29

If you use the C standard library function fopen, your file IO has nothing to do with MPI. You'd better check the file sharing/mapping support of the underlying OS of your MPI nodes. Do you want to check with MPI-IO?

From: Jack Bryan 
Sent: Monday, July 12, 2010 9:01 PM
To: boost-users_at_[hidden] 
Subject: Re: [Boost-users] boost C++ load data from file

thanks

I am working on a multi-computer MPI cluster system. 

If I put some data files in /home/mypath/folder, is it possible that all non-head nodes can access the files in the folder ? 

I need to load some data to some nodes, if all nodes can access the data, I do not need to load them to each node one by one. 

If multiple nodes access the same file to get data, is there conflict ? 

For example, 

fopen(myFile) by node 1, at the same time fopen(myFile) by node 2. 

Is it allowed to do that on MPI cluster without conflict ? 

thansk

Jinxu Ding

July 12  2010

> Date: Tue, 13 Jul 2010 02:35:53 +0200
> From: theom3ga_at_[hidden]
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] boost C++ load data from file
> 
> Hi Jack,
> 
> > (1) how to load the data from 24 x 28 files by boost C++?
> > It is boring to type file's name one by one in program.
> > Is there an alternative to load the data by indexing the file names ?
> 
> You can use boost.filesystem to iterate over all the files contained
> in a folder.
> 
> > (2) how to index the item of the datastructure by boost C++ ?
> 
> I don't really get how the file structure is supposed to be. Could you
> clarify it, maybe including a small example and/or file and folder
> hierachy?
> 
> > Hotmail is redefining busy with tools for the New Busy.
> 
> I don't think hotmail is redefining anything. Well, yes, mediocrity.
> Get yourself a real mail account, like GMail.
> 
> -- 
> José Tomás Tocino García
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users

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