Hi Mark, Thank you for feedback!
On Jan 19, 2016, at 12:13 PM, Miller, Mark C. <[email protected]<mailto:[email protected]>> wrote: Hi Elena, I've used the split (raw/meta) on several occasions for special purposes and when trying to decouple meta-data performance from raw data performance. Yes, the split driver was created to address performance issues with metadata writes. The feature goes back to HDF5 1.2.0! But, I've never used the multi-way driver. Indeed it does seem a bit like overkill to support both as I think the raw/meta split is the primary multi-case. Good to know. We really want to drop it because maintenance of this feature is the issue. One thing, making HDF5 'smart' about H5open()'ing files created by split (or multi) driver. My recollection is that the lib is not smart enough to know that the split driver is needed when opening a file so created and that caller is obligated to set file access props appropriately. You are correct. In fact, I don't even think the lib returns an error from H5open() that might suggest to caller that a split driver should be used. It'd be need if that was improved ;) The enhancement is on our to-do list. One shouldn’t know the driver in order to open a valid HDF5 file. We even started working on the rework, but VDS and SWMR features pushed the priorities. Hopefully, we will get back to it after 1.10.0. Best, Elena Mark' From: Hdf-forum <[email protected]<mailto:[email protected]>> on behalf of Elena Pourmal <[email protected]<mailto:[email protected]>> Reply-To: HDF Users Discussion List <[email protected]<mailto:[email protected]>> Date: Monday, January 18, 2016 8:32 AM To: HDF Users Discussion List <[email protected]<mailto:[email protected]>> Subject: [Hdf-forum] Any users of the multi-file driver? Hello, We have been entertaining an idea of removing multi-file driver in the future releases of HDF5 and leaving the split driver only (it will need reimplementation since the split driver is a wrapper of the multi-file driver). Before we make any decision, we would like to know if anyone uses and what is your experience with the - <https://secure-web.cisco.com/1nGpvY3IzOhBKqzh6GJsP6NMRrou6rHtKKqwvx_rDxGZoQlvumycbs9O7fXKsDr9j1rI_-s2WlBgkdNHM6HwpqK8jvq-8h_VPBr1xSARvadM-jpIg67aEuOxTsgsRXj6MM8uTczI8bYtqZMFrj8OGW3vJlPh10WJ7qj_qihUhpW1hS_HOhcE-OzAXPTwwa7MfyknwiXMJha4bswES3PGF04vpQySKws_rng4VXeSnOJ8gXeGeBtJC8ooI-oSBS1LNM5mw-GnszqgwKhaGrvyc81OpCW5EEzD84G565QKG1_c1lcIDqlvY_PAUao8FaIbICzYUwmDrlFQs1B0qNXMdStJY6L0ckzkQmHHsSLBDTcM/https%3A%2F%2Fwww.hdfgroup.org%2FHDF5%2Fdoc%2FRM%2FRM_H5P.html#Property-SetFaplMulti> multi-file drive<https://secure-web.cisco.com/1nGpvY3IzOhBKqzh6GJsP6NMRrou6rHtKKqwvx_rDxGZoQlvumycbs9O7fXKsDr9j1rI_-s2WlBgkdNHM6HwpqK8jvq-8h_VPBr1xSARvadM-jpIg67aEuOxTsgsRXj6MM8uTczI8bYtqZMFrj8OGW3vJlPh10WJ7qj_qihUhpW1hS_HOhcE-OzAXPTwwa7MfyknwiXMJha4bswES3PGF04vpQySKws_rng4VXeSnOJ8gXeGeBtJC8ooI-oSBS1LNM5mw-GnszqgwKhaGrvyc81OpCW5EEzD84G565QKG1_c1lcIDqlvY_PAUao8FaIbICzYUwmDrlFQs1B0qNXMdStJY6L0ckzkQmHHsSLBDTcM/https%3A%2F%2Fwww.hdfgroup.org%2FHDF5%2Fdoc%2FRM%2FRM_H5P.html#Property-SetFaplMulti>r - split driver <https://secure-web.cisco.com/1nGpvY3IzOhBKqzh6GJsP6NMRrou6rHtKKqwvx_rDxGZoQlvumycbs9O7fXKsDr9j1rI_-s2WlBgkdNHM6HwpqK8jvq-8h_VPBr1xSARvadM-jpIg67aEuOxTsgsRXj6MM8uTczI8bYtqZMFrj8OGW3vJlPh10WJ7qj_qihUhpW1hS_HOhcE-OzAXPTwwa7MfyknwiXMJha4bswES3PGF04vpQySKws_rng4VXeSnOJ8gXeGeBtJC8ooI-oSBS1LNM5mw-GnszqgwKhaGrvyc81OpCW5EEzD84G565QKG1_c1lcIDqlvY_PAUao8FaIbICzYUwmDrlFQs1B0qNXMdStJY6L0ckzkQmHHsSLBDTcM/https%3A%2F%2Fwww.hdfgroup.org%2FHDF5%2Fdoc%2FRM%2FRM_H5P.html#Property-SetFaplSplit> Thank you! Elena ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Elena Pourmal The HDF Group http://secure-web.cisco.com/159O6bSmWH0BjUfC8NZuNitBamQuSZ-Pb8yfxF-sRwLXF_HwkK3cyby4pCDE4EPHlvaj_uJWiVdLX9NEfJvaIUJW1W8fo7WVGMCLvO3YiZOKaqSoxi0zv-bqoiO_go0-44PlU3p617adjsvVRRR8fpOI8qXEE1nmjoMzPpY2J14CcL3YIoCiFXmJsbzqQsio5qFSg8lQYJjlMqWIVV5RWz4a4_hcYQxStS0X8C0RzJhqrX3u2OAwjPXjuS-wFrwU1PDSvwICM47tl5nQLCIAJSC-HknmcFnaKYAHkyOGdP8SqfzIpqrDOrGiJ6KzWd3e145SGvgjKvW3umH6jWez7vaCgGMn8xPgu_wGuMmJAWNI/http%3A%2F%2Fhdfgroup.org 1800 So. Oak St., Suite 203, Champaign IL 61820 217.531.6112 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected]<mailto:[email protected]> http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
_______________________________________________ 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
