I use PT in C++ at higher frequencies than mentioned (20-30hz). It's worth noting it builds on TB and optimizes some parts so it's more suitable to online-appends which you encounter in acquisition but otherwise it's the same foundation. You didn't mention what you were logging at 10hz so you have to figure that in... I wouldn't try recording high resolution video to HDF at that frequency but maybe it'll work for some people and at some resolution it will be acceptable. Make check sure your filter pipeline is nil for real-time purposes no time spent converting and compressing online. Also a quick note that make sure the system doesn't get shut down abruptly - HDF5 does not deal with power loss or crashes very well at the moment but it's something they're working on...
As an alternative I would suggest just dumping to a binary file with all the metadata you need for ever sample. Then just write a python/H5py script to convert that to HDF5 [just] after acquisition - this lets you be very efficient on disk IO, more deterministic performance, potentially log to disk in a way more robust to to power failure/crash, and in your case not have to jump through hoops for the PT. -Jason On Tue, May 26, 2015 at 2:19 PM, Mitchell, Scott - Exelis < [email protected]> wrote: > I haven't done anything with H5TB, but PT is relatively easy to wrap using > the existing examples. > ________________________________________ > From: Hdf-forum [[email protected]] on behalf of Gerd > Heber [[email protected]] > Sent: Tuesday, May 26, 2015 12:11 PM > To: HDF Users Discussion List > Subject: Re: [Hdf-forum] H5TB and H5PT support in HDF5DotNet > > Hi Jianxin, how are you? There’s currently no plan > to support H5TB or H5PT in HDF5DotNet. > The “best” dataset configuration for your acquisition > problem depends on several factors, most of which only you know. > What’re the attributes of the of the events you are trying > to record and what’s their size? Are they the same across > your event stream or do they vary from event to event? > Do you plan on applying some form of compression? > What’s your buffering strategy to deal with rate fluctuations? > How will the data be used or processed? > > Before spending too much time worrying about performance, > you should make sure that your layout is easy to > use downstream. You can do prototyping and generate sample > data in Python or MATLAB. Once you have that settled, > you can tune and revise it for performance. > > Best, G. > > > From: Hdf-forum [mailto:[email protected]] On Behalf > Of Jianxin Chen > Sent: Tuesday, May 26, 2015 9:13 AM > To: [email protected] > Subject: [Hdf-forum] H5TB and H5PT support in HDF5DotNet > > Hi, Expert, > > I am new to HDF5. > > I noticed that H5TB and H5PT two APIs were not supported in HDF5DotNet . > > Is there a plan to support them in HDF5DotNet ? > > What is the best dataset to support real time 10HZ acquisition with HDF5 > technology? > > Thanks for any help! > > JC > ______________________________________________________ > Jianxin Chen > > > ________________________________ > > This e-mail and any files transmitted with it may be proprietary and are > intended solely for the use of the individual or entity to whom they are > addressed. If you have received this e-mail in error please notify the > sender. Please note that any views or opinions presented in this e-mail are > solely those of the author and do not necessarily represent those of Exelis > Inc. The recipient should check this e-mail and any attachments for the > presence of viruses. Exelis Inc. accepts no liability for any damage caused > by any virus transmitted by this e-mail. > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > [email protected] > http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > Twitter: https://twitter.com/hdf5 >
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