{"action":"created","issue":{"url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/issues/165","labels_url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/issues/165/labels{/name}","comments_url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/issues/165/comments","events_url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/issues/165/events","html_url":"https://github.com/ComputationalRadiationPhysics/libSplash/issues/165","id":67308130,"number":165,"title":"Evaluation: Speedup of Close","user":{"login":"ax3l","id":1353258,"avatar_url":"https://avatars.githubusercontent.com/u/1353258?v=3","gravatar_id":"","url":"https://api.github.com/users/ax3l","html_url":"https://github.com/ax3l","followers_url":"https://api.github.com/users/ax3l/followers","following_url":"https://api.github.com/users/ax3l/following{/other_user}","gists_url":"https://api.github.com/users/ax3l/gists{/gist_id}","starred_url":"https://api.github.com/users/ax3l/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ax3l/subscriptions","organizations_url":"https://api.github.com/users/ax3l/orgs","repos_url":"https://api.github.com/users/ax3l/repos","events_url":"https://api.github.com/users/ax3l/events{/privacy}","received_events_url":"https://api.github.com/users/ax3l/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/labels/question","name":"question","color":"cc317c"}],"state":"open","locked":false,"assignee":null,"milestone":{"url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/milestones/3","html_url":"https://github.com/ComputationalRadiationPhysics/libSplash/milestones/Future","labels_url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/milestones/3/labels","id":461439,"number":3,"title":"Future","description":null,"creator":{"login":"f-schmitt-zih","id":5120640,"avatar_url":"https://avatars.githubusercontent.com/u/5120640?v=3","gravatar_id":"","url":"https://api.github.com/users/f-schmitt-zih","html_url":"https://github.com/f-schmitt-zih","followers_url":"https://api.github.com/users/f-schmitt-zih/followers","following_url":"https://api.github.com/users/f-schmitt-zih/following{/other_user}","gists_url":"https://api.github.com/users/f-schmitt-zih/gists{/gist_id}","starred_url":"https://api.github.com/users/f-schmitt-zih/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/f-schmitt-zih/subscriptions","organizations_url":"https://api.github.com/users/f-schmitt-zih/orgs","repos_url":"https://api.github.com/users/f-schmitt-zih/repos","events_url":"https://api.github.com/users/f-schmitt-zih/events{/privacy}","received_events_url":"https://api.github.com/users/f-schmitt-zih/received_events","type":"User","site_admin":false},"open_issues":7,"closed_issues":2,"state":"open","created_at":"2013-10-22T14:01:54Z","updated_at":"2015-04-09T08:30:59Z","due_on":null,"closed_at":null},"comments":2,"created_at":"2015-04-09T08:30:59Z","updated_at":"2015-04-09T15:13:22Z","closed_at":null,"body":"@psychocoderHPC found in a ~~past evaluation~~ paper (ref?), that the time for an [H5Fclose](http://www.hdfgroup.org/HDF5/doc/RM/RM_H5F.html#File-Close) can be reduced by about a *factor 3* if the file-consistency check ([H5F.c](https://svn.hdfgroup.uiuc.edu/hdf5/trunk/src/H5F.c)) is skipped in the HDF5 implementation.\r\n\r\nConsequences for MPI-I/O output could be evaluated. It might be worth to consider adding a hook/option in the HDF5 API and to propose it for upcoming versions of the library.\r\n\r\nThere are also various [close degrees](http://www.hdfgroup.org/HDF5/doc/RM/H5P/H5Pset_fclose_degree.htm) available such as `H5F_CLOSE_WEAK` while the default for MPI-I/O is `H5F_CLOSE_SEMI`."},"comment":{"url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/issues/comments/91260487","html_url":"https://github.com/ComputationalRadiationPhysics/libSplash/issues/165#issuecomment-91260487","issue_url":"https://api.github.com/repos/ComputationalRadiationPhysics/libSplash/issues/165","id":91260487,"user":{"login":"ax3l","id":1353258,"avatar_url":"https://avatars.githubusercontent.com/u/1353258?v=3","gravatar_id":"","url":"https://api.github.com/users/ax3l","html_url":"https://github.com/ax3l","followers_url":"https://api.github.com/users/ax3l/followers","following_url":"https://api.github.com/users/ax3l/following{/other_user}","gists_url":"https://api.github.com/users/ax3l/gists{/gist_id}","starred_url":"https://api.github.com/users/ax3l/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ax3l/subscriptions","organizations_url":"https://api.github.com/users/ax3l/orgs","repos_url":"https://api.github.com/users/ax3l/repos","events_url":"https://api.github.com/users/ax3l/events{/privacy}","received_events_url":"https://api.github.com/users/ax3l/received_events","type":"User","site_admin":false},"created_at":"2015-04-09T15:13:22Z","updated_at":"2015-04-09T15:13:22Z","body":"And the good old [Parallel HDF5 Hints](http://www.hdfgroup.org/HDF5/PHDF5/parallelhdf5hints.pdf)"}}