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From "Alex Petrov (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-11990) Address rows rather than partitions in SASI
Date Thu, 21 Jul 2016 16:43:20 GMT


Alex Petrov updated CASSANDRA-11990:
    Attachment: perf.pdf

Attached is the (very naïve) performance benchmark, although in some cases even this one
is indicative. 

Compared are trunk and the [early patch for this branch|].

I'm writing 10, 100 and 1000 rows with 10, 100 and 1000 byte string values. 

On clustering column, the difference is insignificant, since SASI can already take an advantage
of clustering restrictions. However, on "regular" column the difference is more obvious.

Querying on static columns currently would result into the whole partition read, even if there's
another {{Operation}} intersecting in the current partition. 

> Address rows rather than partitions in SASI
> -------------------------------------------
>                 Key: CASSANDRA-11990
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Alex Petrov
>            Assignee: Alex Petrov
>         Attachments: perf.pdf
> Currently, the lookup in SASI index would return the key position of the partition. After
the partition lookup, the rows are iterated and the operators are applied in order to filter
out ones that do not match.
> bq. TokenTree which accepts variable size keys (such would enable different partitioners,
collections support, primary key indexing etc.), 

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