[ https://issues.apache.org/jira/browse/CASSANDRA-6246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16128159#comment-16128159 ]
Igor Zubchenok edited comment on CASSANDRA-6246 at 8/16/17 12:45 AM: --------------------------------------------------------------------- I would like to try, but I'm not familiar with Cassandra source code. :( Isn't it easier to implement the patch again, but without rebase from 4 year old code? BTW, I'm looking for a solution to implement a *reference counter based on Cassandra*. My first reference counter implementation has been made on counter columns, but unfortunately it had been ruined with tombstones issue - when a counter get back to zero, I cannot delete nor compact it. My guess was that the lightweight Cassandra transactions can do a very good job for my task. I was so naive and now I have an issue with WriteTimeoutException and inconsistent state. The only workaround I came up with today is to do an exclusive lock that can be easily made with LWT with TTL, and subsequent change of a value, but it will have much more greater performance hit. I'm still looking for a good solution on that with Cassandra. Currently I'm naive again and expecting that EPaxos will help me, but seems it will never-never be merged and released. Dear community, do you have any idea? P.S. Huge thanks and warm hugs to everyone who answers me! was (Author: geagle): I would like to try, but I'm not familiar with Cassandra source code. :( Isn't it easier to implement the patch again, but without rebase from 4 year old code? BTW, I'm looking for a solution to implement a *reference counter based on Cassandra*. My first reference counter implementation has been made on counter columns, but unfortunately it had been ruined with tombstones issue - when a counter get back to zero, I cannot delete nor compact it. My guess was that the lightweight Cassandra transactions can do a very good job for my task. I was so naive and now I have an issue with WriteTimeoutException and inconsistent state. The only workaround I came up with today is to do an exclusive lock that can be easily made with LWT with TTL, and subsequent change of a value, but it will have much more greater performance hit. I'm still looking for a good solution on that with Cassandra. Currently I'm naive again and expecting that EPaxos will help me, but seems it will never-never be merged and released. Dear community, do you have any idea? Huge thanks to everyone who answers me. > EPaxos > ------ > > Key: CASSANDRA-6246 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6246 > Project: Cassandra > Issue Type: Improvement > Reporter: Jonathan Ellis > Assignee: Blake Eggleston > Labels: messaging-service-bump-required > Fix For: 4.x > > > One reason we haven't optimized our Paxos implementation with Multi-paxos is > that Multi-paxos requires leader election and hence, a period of > unavailability when the leader dies. > EPaxos is a Paxos variant that requires (1) less messages than multi-paxos, > (2) is particularly useful across multiple datacenters, and (3) allows any > node to act as coordinator: > http://sigops.org/sosp/sosp13/papers/p358-moraru.pdf > However, there is substantial additional complexity involved if we choose to > implement it. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org