[jira] [Updated] (CASSANDRA-6356) Proposal: Statistics.db (SSTableMetadata) format change

["Yuki Morishita (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-6356?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yuki Morishita updated CASSANDRA-6356:
--------------------------------------

    Attachment: 6356-v2.txt

also: https://github.com/yukim/cassandra/commits/6356-v2

v2 modified new metadata format to have TOC section at the beginning of the file to easily seek to the position of desired metadata.

> Proposal: Statistics.db (SSTableMetadata) format change
> -------------------------------------------------------
>
>                 Key: CASSANDRA-6356
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6356
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Yuki Morishita
>            Assignee: Yuki Morishita
>            Priority: Minor
>             Fix For: 2.1
>
>         Attachments: 6356-v2.txt
>
>
> We started to distinguish what's loaded to heap, and what's not from Statistics.db. For now, ancestors are loaded as they needed.
> Current serialization format is so adhoc that adding new metadata that are not permanently hold onto memory is somewhat difficult and messy. I propose to change serialization format so that a group of stats can be loaded as needed.



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