Re[5]: [PVFS-users] Re: ROMIO on PVFS

[Lei@ICS]

Hi Rob,

Here is a question that our system admin
had to ask:

> Hi Lei,
>
> Do you know if there is a way to apply this patch to the binaries,
> or is my only option to apply it to the source and recompile?


Thanks,

-Lei         mailto:pan@ics.uci.edu

Friday, January 30, 2004, 8:11:25 AM, you wrote:

RR> Lei,

RR> Please let us know if the newer pvfs-1.6.2-01292004.patch helps with this.
RR> Not sure what is going on.

RR> On Tue, 20 Jan 2004, Lei@ICS wrote:

>> RR> Is this all on the same node?
>> 
>> There were two ways to create that large file:
>> 1) It was written from a Fortran sequential
>> program using the Fortran open(). I don't know
>> if in this case PVFS would write the entire file
>> to one node.

RR> No, it would be striped with default parameters, which should put it on
RR> all nodes.

>> 2) It was written from a MPI Fortran program
>> using MPI_FILE_OPEN(), MPI_SET_VIEW(), MPI_FILE_WRITE().
>> This time the file should be written to different
>> nodes.
>> 
>> For both files created in the above two ways,
>> ls *.slc does not work.
>> 
>> RR> Does the file show up in just "ls -l"?
>> 
>> Yes.
>> 
>> RR> Is it visible on other nodes?
>> 
>> Yes, using ls. But no, using ls *.slc
>> 
>> RR> What "ls" are you using?  Is it built into your shell?
>> 
>> The Linux ls. I am not sure if it is built into my shell.
>> I am not sure if I understand this question.

RR> Some shells have a builtin "ls".  For example tcsh has a builtin ls-F that
RR> people sometimes alias ls to.  So if you run "/bin/ls *.slc" do you see
RR> this?  Just want to make sure that I understand what binary is doing this.

>> RR> Could you send an strace of both the failing and successful commands?
>> 
>> Not sure what you wanted.

RR> "strace" is a program that captures the system calls used by a program.
RR> You use it like "strace -o strace-ls.out ls *.slc".  That output would be
RR> useful to us.

RR> Thanks,

RR> Rob