Hi Barbara, Ah ok. Thanks. Jan-------- Oryginalna wiadomość --------Od: h...@hdfgroup.org Data: 16.02.2018 19:16 (GMT+01:00) Do: "Kotanski, Jan" <jan.kotan...@desy.de> DW: debian-science-maintainers@lists.alioth.debian.org Temat: Re: hdfview 2.11 locks SWMR files Hi Jan,
You can use the h5clear -s utility to remove the flag. I should have mentioned that! -Barbara On Fri, 16 Feb 2018, Kotanski, Jan wrote: > Hi Barbara, > > Is there any way to rescue (i.e. unlock) the files broken by hdfview, > e.g. a script which unlocks the file? > > If not we have to forbid our user to use the hdfview (or do not use SWMR). > They don't know a priori if the file was created with SWMR or not. > And if they cannot unlock broken files they loose their data. > > Best regards, > Jan > > ----- Original Message ----- > From: h...@hdfgroup.org > To: "Jan Kotanski" <jan.kotan...@desy.de> > Cc: debian-science-maintainers@lists.alioth.debian.org > Sent: Friday, 16 February, 2018 16:49:46 > Subject: Re: hdfview 2.11 locks SWMR files > > Hi Jan, > > HDFView 2.11 is based on HDF5-1.8 with 32-bit object identifiers. SWMR is a > new > feature in HDF5-1.10 (which has 64-bit object identifiers). > > HDFView 3.0 (Beta) supports HDF5-1.10. However, even if you use it and select > "File->Open", it gets a lock on the file and it modifies it. We are working on > resolving this issue for the release version of HDFView 3.0 due out later this > year (after HDF5-1.10.2). > > As a workaround, we believe you should be able to use HDFView 3.0 (Beta) to > open > the file if you select "File->Open Read-Only". > > -Barbara > > ======================================================== > Barbara Jones, The HDF Group Helpdesk, h...@hdfgroup.org > Support Services: https://www.hdfgroup.org/solutions/ > ======================================================== > > On Fri, 16 Feb 2018, Jan Kotanski wrote: > >> Dear HDFView Maintainers, >> >> I've just accounted problems in reading SWMR files with hdfview 2.11 on >> debian stretch. >> >> The hdfview 2.11 not only cannot read the SWMR files but it breaks them, >> i.e. set a lock inside the files, >> and the files are no more readable. >> >> For example I create a file >> >> http://www.desy.de/~jkotan/swmr/swmr.h5 >> >> with: >> >> http://www.desy.de/~jkotan/swmr/writer2dattr.py >> >> Normally, I can read it on stretch with: >> >> http://www.desy.de/~jkotan/swmr/reader2d.py >> >> >> But after I run: >> >> jkotan@stretch-jk:~/sources/lavue/nxstest$ hdfview swmr.h5 >> >> I get: >> >> jkotan@stretch-jk:~/sources/lavue/nxstest$ python reader2d.py >> Traceback (most recent call last): >> File "reader2d.py", line 4, in <module> >> f = h5py.File("swmr.h5", 'r', libver='latest', swmr=True) >> File "/usr/lib/python2.7/dist-packages/h5py/_hl/files.py", line 271, in >>__init__ >> fid = make_fid(name, mode, userblock_size, fapl, swmr=swmr) >> File "/usr/lib/python2.7/dist-packages/h5py/_hl/files.py", line 101, in >>make_fid >> fid = h5f.open(name, flags, fapl=fapl) >> File "h5py/_objects.pyx", line 54, in h5py._objects.with_phil.wrapper >>(/build/h5py-b1xqNM/h5py-2.7.0/h5py/_objects.c:2842) >> File "h5py/_objects.pyx", line 55, in h5py._objects.with_phil.wrapper >>(/build/h5py-b1xqNM/h5py-2.7.0/h5py/_objects.c:2800) >> File "h5py/h5f.pyx", line 78, in h5py.h5f.open >>(/build/h5py-b1xqNM/h5py-2.7.0/h5py/h5f.c:2127) >> IOError: Unable to open file (File is not already open for swmr writing) >> >> >> Thus, the hdfview breaks the file and the SWMR file is not more readable. >> >> >> Is it possible to provide backports for the hdfview package with the version >> which fix the above problem >> (hope the newer version, e.g. 3.0.0 fix this problem)? >> >> >> Best regards, >> Jan >> > > -- > --
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