sectionPage 8 [zotero-users-5466518-nzgyw5mf]
Faaslets write changes from the local to the global tier by performing a push, and read from the global to the local tier by performing a pull. DDOs may employ push and pull op- erations to produce variable consistency, such as delaying updates in an eventually-consistent list or set, and may lazily pull values only when they are accessed, such as in a dis- tributed dictionary. Certain DDOs are immutable, and hence avoid repeated synchronisation.