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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-2904) get_range_slices with no columns could be made faster by scanning the index file
Date Sun, 17 Jul 2011 13:40:59 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-2904:
--------------------------------------

             Priority: Minor  (was: Major)
    Affects Version/s:     (was: 0.7.6)

> get_range_slices with no columns could be made faster by scanning the index file
> --------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-2904
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2904
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jean-Francois Im
>            Priority: Minor
>
> When scanning a column family using get_range_slices() and a predicate that contains
no columns, the scan operates on the actual data, not the index file.
> Our use case for this is that we have a column family that has relatively wide rows(varying
from 10kb to over 100kb of data per row) and we need to do iterate through all the keys to
figure out which rows we are interested in; obviously, going through the index file than the
data is faster in this case(in the order of minutes versus hours).

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