ignite-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-4638) Share current DDL schema and pending DDL operations with joining nodes
Date Wed, 01 Feb 2017 14:36:51 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-4638?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vladimir Ozerov updated IGNITE-4638:
------------------------------------
    Description: 
1) Basically there are three operation types which must be shared with joining node:
- Completed - shared as snapshot of current schema state;
- Acked - shared as operation requests;
- Inited ops - shared as operation requests.

2) Completed and acked operations are applied right away.

3) Inited operations are not applied immediately. Instead, joined node sends {{VERIFY_INIT_OPS}}
request to coordinator. Operations are applied only after coordinator confirmed that they
were not rejected on {{INIT}} stage.

It seems that to achieve p.3 nodes will have to keep a kind of history of rejected operations
which is not desirable.

  was:
Design considerations:
1) Should be implemented through custom discovery data mechanism. 
2) Probably it makes sense to add version to every DDL change. E.g. (topVer + local coordinator
ctr). It will help us to avoid duplicated operations in case of some unforseen races.


> Share current DDL schema and pending DDL operations with joining nodes
> ----------------------------------------------------------------------
>
>                 Key: IGNITE-4638
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4638
>             Project: Ignite
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Vladimir Ozerov
>             Fix For: 2.0
>
>
> 1) Basically there are three operation types which must be shared with joining node:
> - Completed - shared as snapshot of current schema state;
> - Acked - shared as operation requests;
> - Inited ops - shared as operation requests.
> 2) Completed and acked operations are applied right away.
> 3) Inited operations are not applied immediately. Instead, joined node sends {{VERIFY_INIT_OPS}}
request to coordinator. Operations are applied only after coordinator confirmed that they
were not rejected on {{INIT}} stage.
> It seems that to achieve p.3 nodes will have to keep a kind of history of rejected operations
which is not desirable.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

Mime
View raw message