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Posted to issues@ignite.apache.org by "Anton Vinogradov (JIRA)" <ji...@apache.org> on 2019/05/30 08:53:00 UTC
[jira] [Updated] (IGNITE-10663) Implement cache mode allows reads
with consistency check and fix
[ https://issues.apache.org/jira/browse/IGNITE-10663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anton Vinogradov updated IGNITE-10663:
--------------------------------------
Description:
The main idea is to provide special "read from cache" mode which will read a value from primary and all backups and will check that values are the same.
In case values differ they should be fixed according to the appropriate strategy.
ToDo list:
1) {{cache.withReadRepair().get(key)}} should guarantee values will be checked across the topology and fixed if necessary.
2) LWW (Last Write Wins) strategy should be used for validation.
3) Since LWW and any other strategy do not guarantee that the correct value will be chosen.
We have to record the event contains all values and the chosen one.
was:
The main idea is to provide special "read from cache" mode which will read a value from primary and all backups and will check that values are the same.
In case values differ they should be fixed according to the appropriate strategy.
ToDo list:
1) {{cache.withConsistency().get(key)}} should guarantee values will be checked across the topology and fixed if necessary.
2) LWW (Last Write Wins) strategy should be used for validation.
3) Since LWW and any other strategy do not guarantee that the correct value will be chosen.
We have to record the event contains all values and the chosen one.
> Implement cache mode allows reads with consistency check and fix
> ----------------------------------------------------------------
>
> Key: IGNITE-10663
> URL: https://issues.apache.org/jira/browse/IGNITE-10663
> Project: Ignite
> Issue Type: Task
> Reporter: Anton Vinogradov
> Assignee: Anton Vinogradov
> Priority: Major
> Labels: iep-31
> Fix For: 2.8
>
> Time Spent: 10h 10m
> Remaining Estimate: 0h
>
> The main idea is to provide special "read from cache" mode which will read a value from primary and all backups and will check that values are the same.
> In case values differ they should be fixed according to the appropriate strategy.
> ToDo list:
> 1) {{cache.withReadRepair().get(key)}} should guarantee values will be checked across the topology and fixed if necessary.
> 2) LWW (Last Write Wins) strategy should be used for validation.
> 3) Since LWW and any other strategy do not guarantee that the correct value will be chosen.
> We have to record the event contains all values and the chosen one.
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