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From "Ivan Rakov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-6033) Add sorted and multithreaded modes in checkpoint algorithm
Date Thu, 10 Aug 2017 16:00:02 GMT
Ivan Rakov created IGNITE-6033:

             Summary: Add sorted and multithreaded modes in checkpoint algorithm
                 Key: IGNITE-6033
                 URL: https://issues.apache.org/jira/browse/IGNITE-6033
             Project: Ignite
          Issue Type: Improvement
          Components: persistence
    Affects Versions: 2.1
            Reporter: Ivan Rakov
            Assignee: Ivan Rakov
             Fix For: 2.2

Sequential writes to SSD are faster than random. When we write checkpoint, we iterate through
hash table, which is actually random order. We should add an option to write pages sorted
by page index. It should be configured in PersistentStoreConfiguration.
Also, we already have PersistentStoreConfiguration#checkpointingThreads option, but we don't
use it - we create thread pool, but submit only one task to it. This should be fixed as well.

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