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christyleomin · Joined: 08 Apr 2011 Posts: 155

I'm writing 2 text files using FORTRAN each file being 50 MB and I'm opening both files simultaneously and writing.

I find that the tiem taken for writing is perhaps taking longer.

What could be the rpoblem?Can anyoen help

Christy

christyleomin · Joined: 08 Apr 2011 Posts: 155

Please can anyone help?

PaulLaidler · Posted: Sat Mar 16, 2013 9:56 am Post subject:

If you can provide a short sample program, help may be available.

christyleomin · Joined: 08 Apr 2011 Posts: 155

I have 2 files to which I'm writing soem information, they are both text files

DanRRight · Posted: Sun Mar 17, 2013 7:17 pm Post subject:

Can you post small working prototype code which measures time for writing two files consequently versus writing two files simultaneously?

christyleomin · Joined: 08 Apr 2011 Posts: 155

Yes.

Simultaneosly- 19 minutes

If I generate just one of any of the two files 3 minutes

DanRRight · Posted: Sun Mar 17, 2013 8:37 pm Post subject:

That is unusual indeed unless you write on punchcards, lineprinter or use 40 years old floppy disks LOL.

Post as Paul said above small 20 lines working code demonstrating that difference which we can run on our computers. It takes 3 min to write it. Don't be shy of your code style or dumb errors, we all make mistakes.

Or if the code is tricky to extract small snippet, run the whole code on free Qsoft RAMdrive which has speed 5 GB per second, 10-100 times faster then any harddrive or SSD, and see if this was a hardware issue.