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https://issues.apache.org/jira/browse/IGNITE-19770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Puchkovskiy updated IGNITE-19770:
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Description:
According to IEP-98, when obtaining a schema at a timestamp T, we need to wait
till Meta-Storage SafeTime becomes >= T-DD. A mechanism for such waits needs to
be implemented.
It can be implemented either as methods like
{{CompletableFuture<TableDefinition> table(String tableName, HybridTimestamp
ts)}} (for each getting method) or a single method like
{{CompletableFuture<Void> waitForTs(HybridTimestamp)}} (then usual sync methods
to be used to get the definitions).
was:
According to IEP-98, when obtaining a schema at a timestamp T, we need to wait
till Meta-Storage SafeTime becomes >= T-DD. A mechanism for such waits needs to
be implemented.
Also, we will probably need to wait for a specific version of a table/index/etc
(or a version of a Catalog as a whole), so a way to wait for it (and not for a
ts) is also needed.
Both can be implemented either as methods like
{{CompletableFuture<TableDefinition> table(String tableName, HybridTimestamp
ts)}} (for each getting method) or a single method like
{{CompletableFuture<Void> waitForTs(HybridTimestamp)}} (then usual sync methods
to be used to get the definitions).
> Add a mechanism to wait till a schema is available via Schema Sync at a ts
> --------------------------------------------------------------------------
>
> Key: IGNITE-19770
> URL: https://issues.apache.org/jira/browse/IGNITE-19770
> Project: Ignite
> Issue Type: Improvement
> Reporter: Roman Puchkovskiy
> Assignee: Roman Puchkovskiy
> Priority: Major
> Labels: iep-98, ignite-3
> Fix For: 3.0.0-beta2
>
>
> According to IEP-98, when obtaining a schema at a timestamp T, we need to
> wait till Meta-Storage SafeTime becomes >= T-DD. A mechanism for such waits
> needs to be implemented.
> It can be implemented either as methods like
> {{CompletableFuture<TableDefinition> table(String tableName, HybridTimestamp
> ts)}} (for each getting method) or a single method like
> {{CompletableFuture<Void> waitForTs(HybridTimestamp)}} (then usual sync
> methods to be used to get the definitions).
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