Hi Ofer,
By default the missing components of the path are not created (just
for 'fopen(...)' or 'open(...)').
However, you can force their creation in the following way:
1. At file level, by adding the option 'mkpath=1' in the URL
(e.g. 'root://theserver//new/path/file.root?mkpath=1')
2. Globally using the setting
XNet.Mkpath: 1
in the relevant .rootrc file ($HOME/.rootrc or
$ROOTSYS/etc/system.rootrc or /etc/root/system.rootrc)
When this option is set, TXNetFile sets the 'kXR_mkpath' bit in the
option field when opening the file.
Most likely xrdcp sets always this bit, which would explain the
different behavior.
Hope it helps.
Gerri
On 10/06/2010 04:24 AM, Ofer Rind wrote:
> Hi all,
>
> Are there any known issues trying to create a new file using
> TFile::Open() within ROOT when the parent directory has not been
> created previously? We seem to be unable to do this on the small
> xrootd deployment we have here at BNL for the Daya Bay group. With
> xrdcp, the parent directories get created automatically. Also, there
> is no problem creating the new file from within ROOT if the parent
> directories have been created previously on the selected storage
> server. Is this a server configuration issue, or possibly something
> missing in ROOT?
>
> We are using ROOT v5.26/00b and xrd version 20091028-1003_dbg. I have
> attached a ROOT log executing
>
> TFile* file = TFile::Open(url,"RECREATE");
>
> when the url is pointing to a nonexisting directory. The error we get is
>
> 101005 17:53:36 001 Xrd: ReadPartialAnswer: Server
> [daya0002.rcf.bnl.gov:1094] answered [kXR_error] (4003)
> 101005 17:53:36 001 Xrd: CheckErrorStatus: Server
> [daya0001.rcf.bnl.gov:1094] declared: Unable to create
> /xrootd/bv/test/does-not-exist/file.root; No such file or
> directory(error code: 3011)
> 101005 17:53:36 001 Xrd: Open: Error opening the file
> /xrootd/bv/test/does-not-exist/file.root on host
> daya0001.rcf.bnl.gov:1094
> Error in <TXNetFile::CreateXClient>: open attempt failed on
> root://daya0001//xrootd/bv/test/does-not-exist/file.root
>
> I have also attached our xrootd.cf. Any advice would be much
> appreciated and sincere apologies if this has been discussed and
> answered before.
>
> Thanks!
> Ofer Rind
>
> PS This is the same problem discussed in
> http://root.cern.ch/phpBB3//viewtopic.php?p=41410&sid=a528e02dc23a6c9a6697dd7fa78e3818
> (the problem was not the server but rather the absence of the parent
> directories).
>
>
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