Re: .root files size limit?

From: Christopher A. Stevens (stevensca@navair.navy.mil)
Date: Tue Oct 05 1999 - 20:16:08 MEST


I am just a root newbie, so hopefully someone can confirm this, but I
think you are running into an operating system limit not a ROOT limit. 
I believe most (if not all) 32 bit operating systems have a file size
limit of about 2 Gig.  This would be true if you are using Win* or Linux
O.S.

BTW, does anyone use ROOT under Solaris 2.6 and above?  Can ROOT be made
"large file aware" under Solaris to go above the 2 Gig limit?

Chris Stevens

William Love wrote:
> 
>    Rootmeisters
> 
>    I was running a program writing a root file output and it stopped
>  with an output file
>  1999999975 Oct  5 13:28 R3452_1_lasertree.root
> 
>   Unfortunately I don't remember the error but I assume I have hit a file
>  size limit?  I can use the file by root's automatic recovery but when I
>  tried to save the recovered directory I find
> Error in <TKey::Create>: Cannot allocate 2833 bytes for ID =
> R3452_1_lasertree.root Title =
> Error in <TKey::Create>: Cannot allocate 66 bytes for ID =
> R3452_1_lasertree.root Title =
> 
>    This makes it even more likely I have hit a maximum size limit in root?
> 
>   Is there any way to convince root to write larger files?
> 
>                                                              Bill Love



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