[lustre-discuss] How to do Lustre settings for a file from C++ code

[Henwood, Richard]

On Mon, 2016-02-22 at 19:28 +0000, Dilger, Andreas wrote:
> On Mon, 2016-02-22 at 13:36 +0000, Prakrati.Agrawal at shell.com wrote:
> > Hi,
> >  
> > I am writing multiple files to Lustre file system of different
> > sizes.
> > I want to change my stripe size and stripe count from the C++ code.
> > I
> > am using HDF5 to create file and hyperslabs and write in it. Is
> > there
> > any way to do it?
> 
> There is a library "liblustreapi" that has C function interfaces for
> creating files with specific stripe parameters - llapi_file_open() is
> the
> most basic interface that allows open/create of a file and setting
> the
> stripe count, stripe size, and starting OST index.  A more complete
> interface is llapi_file_open_param() that lets the application
> specify
> more parameters for the layout.
> 

FYI: an obligatory Operations Manual reference (including sample code
in 34.2.5):

https://build.hpdd.intel.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#settinglustreproperties

-- 
Richard.Henwood at intel.com
Intel High Performance Data Division