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