[jira] [Comment Edited] (ACCUMULO-3590) Rolling upgrade support

["Christopher Tubbs (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ACCUMULO-3590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15388978#comment-15388978 ] 

Christopher Tubbs edited comment on ACCUMULO-3590 at 7/22/16 6:11 AM:
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{{instance.\*}} properties are for properties which should be consistent across a cluster. Most new properties we add between versions should fall into {{general.\*}} instead.

The main thing that changes between versions affecting the {{SystemToken}} is going to be the "wire version", which is part of the token to prevent cross-communication between incompatible versions with respect to the RPC layer.


was (Author: ctubbsii):
{{instance.*}} properties are for properties which should be consistent across a cluster. Most new properties we add between versions should fall into {{general.*}} instead.

The main thing that changes between versions affecting the {{SystemToken}} is going to be the "wire version", which is part of the token to prevent cross-communication between incompatible versions with respect to the RPC layer.

> Rolling upgrade support
> -----------------------
>
>                 Key: ACCUMULO-3590
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3590
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Josh Elser
>             Fix For: 1.9.0
>
>
> We really lack any support for rolling upgrades between versions of Accumulo.
> Need to have a way to provide seamless upgrades between certain versions of Accumulo which minimize any downtime/impact on users of the system.
> Need to cover fundamental control features (like a rolling upgrade), changes to our serialized data structures (help prevent us from goofing up serialization across versions -- thrift/protobuf/etc), backwards/forward compatible RFile and WAL support (including control), lots of tests, and lots of documentation.



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