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## start-over-automatically-at-everyaccess
options(tutorial.storage = list(
# save an arbitrary R object "data" to storage
save_object = function(tutorial_id, tutorial_version, user_id, object_id, data) {},
# retreive a single R object from storage
get_object = function(tutorial_id, tutorial_version, user_id, object_id) {NULL},
# retreive a list of all R objects stored
get_objects = function(tutorial_id, tutorial_version, user_id) {list()},
# remove all stored R objects
remove_all_objects = function(tutorial_id, tutorial_version, user_id) {}
))
Issue
一度ブラウザを閉じてから再度アクセスしたときのサーバー負荷が高い
原因?
learnrパッケージは、ストレージにセッション情報を記録して再アクセス時に前回作業を再現するので、サーバーでRプロセスが多数走ることになり負荷が高い。
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