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Posted to commits@cassandra.apache.org by "Giampaolo (JIRA)" <ji...@apache.org> on 2016/06/14 09:42:01 UTC

[jira] [Updated] (CASSANDRA-10273) Reduce number of data directory scans during startup

     [ https://issues.apache.org/jira/browse/CASSANDRA-10273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Giampaolo updated CASSANDRA-10273:
----------------------------------
    Description: 
ATM we scan each data directory four times. We could easily reduce that to at least two, maybe to one.

# pre-flight (startup tests) scrub
# pre-flight (startup tests) sstable min version
# {{ColumnFamilyStore.createColumnFamilyStore}}
# {{ColumnFamilyStore.<init>}} (if {{loadSSTables==true}})

First two pre-flight tests could be combined to one and 3+4 could also be combined, as both appear at pretty related code paths.

  was:
ATM we scan each data directory four times. We could easily reduce that to at least two, maybe to one.

1. pre-flight (startup tests) scrub
1. pre-flight (startup tests) sstable min version
1. {{ColumnFamilyStore.createColumnFamilyStore}}
1. {{ColumnFamilyStore.<init>}} (if {{loadSSTables==true}})

First two pre-flight tests could be combined to one and 3+4 could also be combined, as both appear at pretty related code paths.


> Reduce number of data directory scans during startup
> ----------------------------------------------------
>
>                 Key: CASSANDRA-10273
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10273
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Robert Stupp
>            Assignee: Giampaolo
>            Priority: Minor
>              Labels: lhf
>
> ATM we scan each data directory four times. We could easily reduce that to at least two, maybe to one.
> # pre-flight (startup tests) scrub
> # pre-flight (startup tests) sstable min version
> # {{ColumnFamilyStore.createColumnFamilyStore}}
> # {{ColumnFamilyStore.<init>}} (if {{loadSSTables==true}})
> First two pre-flight tests could be combined to one and 3+4 could also be combined, as both appear at pretty related code paths.



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