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From "maoling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-3352) Use LevelDB For Backend
Date Wed, 10 Apr 2019 11:43:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-3352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16814372#comment-16814372
] 

maoling commented on ZOOKEEPER-3352:
------------------------------------

A good issue.That will be a huge work.
1. zk is read-heavy system,so LSM data structure may be not a good option.
2. For the reference the design of etcd-v3 which used boltDB(the https://github.com/boltdb/bolt)
as the backend store engine.
https://github.com/etcd-io/etcd/issues/2646
I also find this:mavibot,
https://github.com/apache/directory-mavibot
https://directory.apache.org/mavibot/user-guide.html
3.Before we choose the new backend store engine,we need to take the following into consideration:
 Does it support b-tree?, mvcc?
 Does it support tranctions?
Is it light-weight, embedded?
 it has been endorsed by other famous system?

> Use LevelDB For Backend
> -----------------------
>
>                 Key: ZOOKEEPER-3352
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3352
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>            Reporter: David Mollitor
>            Assignee: David Mollitor
>            Priority: Major
>             Fix For: 4.0.0
>
>
> Use LevelDB for managing data stored in ZK (transaction logs and snapshots).
> https://stackoverflow.com/questions/6779669/does-leveldb-support-java



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