[NeXus-code-tickets] [NeXusCode] #183: deletting data from nexus file

[NeXus Data Format Library and Applications]

#183: deletting data from nexus file
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  Reporter:  Cpascual     |      Owner:  Unassigned
      Type:  enhancement  |     Status:  closed
  Priority:  minor        |  Milestone:
 Component:  napi         |    Version:  4.2.0
Resolution:  wontfix      |   Keywords:
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Changes (by Mark Koennecke):

 * status:  new => closed
 * resolution:   => wontfix


Old description:

> It would be nice if Nexus supported deleting of data.
> This ticket is related to the following thread:
>
> http://lists.nexusformat.org/pipermail/nexus/2009/000332.html
>
> It seems that hdf5 supports deleting (pointed out by Freddie):
>
> http://hdfgroup.org/hdf5-quest.html#del
>
> and that it is possible to implement it for xml as well (pointed out by
> Darren Kelly):
>
> http://lists.nexusformat.org/pipermail/nexus/2009/000336.html
>
> None of these solutions recover the space in the file but, at least, they
> allow for restructuring the nexus tree and removing/changing metadata,
> which are my main concerns.
> When saving space is a concern, recreating the file after filtering out
> unwanted content seems the way to go (until hdf5 supports free space
> handling).

New description:

 It would be nice if Nexus supported deleting of data.
 This ticket is related to the following thread:

 http://lists.nexusformat.org/pipermail/nexus/2009/000332.html

 It seems that hdf5 supports deleting (pointed out by Freddie):

 http://hdfgroup.org/hdf5-quest.html#del

 and that it is possible to implement it for xml as well (pointed out by
 Darren Kelly):

 http://lists.nexusformat.org/pipermail/nexus/2009/000336.html

 None of these solutions recover the space in the file but, at least, they
 allow for restructuring the nexus tree and removing/changing metadata,
 which are my main concerns.
 When saving space is a concern, recreating the file after filtering out
 unwanted content seems the way to go (until hdf5 supports free space
 handling).

--

Comment:

 We  can only sort halfways for HDF 5, not for HDF 4 or XML.
 There is not much interest.  Closed.

-- 
Ticket URL: <http://trac.nexusformat.org/code/ticket/183#comment:1>
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