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Posted to issues@kudu.apache.org by "Hao Hao (JIRA)" <ji...@apache.org> on 2018/03/15 03:37:00 UTC
[jira] [Updated] (KUDU-1704) Add a new read mode to perform bounded
staleness snapshot reads
[ https://issues.apache.org/jira/browse/KUDU-1704?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hao Hao updated KUDU-1704:
--------------------------
Description:
It would be useful to be able to perform snapshot reads at a timestamp that is higher than a client previous writes (achieve read-your-writes), thus improving recency, but lower that the server's oldest inflight transaction, thus minimizing the scan's chance to block.
Such a mode would not guarantee linearizability, but would still allow for client-local read-your-writes, which seems to be one of the properties users care about the most.
The detail design of the mode is available in the linked design doc.
This should likely be the new default read mode for scanners.
was:
It would be useful to be able to perform snapshot reads at a timestamp that is higher than a client provided timestamp, thus improving recency, but lower that the server's oldest inflight transaction, thus minimizing the scan's chance to block.
Such a mode would not guarantee linearizability, but would still allow for client-local read-your-writes, which seems to be one of the properties users care about the most.
This should likely be the new default read mode for scanners.
> Add a new read mode to perform bounded staleness snapshot reads
> ---------------------------------------------------------------
>
> Key: KUDU-1704
> URL: https://issues.apache.org/jira/browse/KUDU-1704
> Project: Kudu
> Issue Type: Sub-task
> Components: client
> Affects Versions: 1.1.0
> Reporter: David Alves
> Assignee: Hao Hao
> Priority: Major
> Labels: consistency
> Fix For: 1.7.0
>
>
> It would be useful to be able to perform snapshot reads at a timestamp that is higher than a client previous writes (achieve read-your-writes), thus improving recency, but lower that the server's oldest inflight transaction, thus minimizing the scan's chance to block.
> Such a mode would not guarantee linearizability, but would still allow for client-local read-your-writes, which seems to be one of the properties users care about the most.
> The detail design of the mode is available in the linked design doc.
> This should likely be the new default read mode for scanners.
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