[ https://issues.apache.org/jira/browse/FLINK-3997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17334322#comment-17334322 ]
Flink Jira Bot commented on FLINK-3997: --------------------------------------- This issue was marked "stale-assigned" and has not received an update in 7 days. It is now automatically unassigned. If you are still working on it, you can assign it to yourself again. Please also give an update about the status of the work. > PRNG Skip-ahead > --------------- > > Key: FLINK-3997 > URL: https://issues.apache.org/jira/browse/FLINK-3997 > Project: Flink > Issue Type: Improvement > Components: Library / Graph Processing (Gelly) > Affects Versions: 1.1.0 > Reporter: Greg Hogan > Assignee: Greg Hogan > Priority: Major > Labels: stale-assigned > > The current sources of randomness for Gelly Graph Generators use fixed-size > blocks of work which include an initial seed. There are two issues with this > approach. First, the size of the collection of blocks can exceed the Akka > limit and cause the job to silently fail. Second, as the block seeds are > randomly chosen, the likelihood of blocks overlapping and producing the same > sequence increases with the size of the graph. > The random generators will be reimplemented using {{SplittableIterator}} and > PRNGs supporting skip-ahead. > This ticket will implement skip-ahead with LCGs [0]. Future work may add > support for xorshift generators ([1], section 5 "Jumping Ahead"). > [0] > https://mit-crpg.github.io/openmc/methods/random_numbers.html#skip-ahead-capability > [1] https://arxiv.org/pdf/1404.0390.pdf -- This message was sent by Atlassian Jira (v8.3.4#803005)