[jira] [Created] (IGNITE-9903) Copy only actual amount of data during archiving of WAL segment

["Andrey Gura (JIRA)" <ji...@apache.org>]

Andrey Gura created IGNITE-9903:
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             Summary: Copy only actual amount of data during archiving of WAL segment
                 Key: IGNITE-9903
                 URL: https://issues.apache.org/jira/browse/IGNITE-9903
             Project: Ignite
          Issue Type: Improvement
            Reporter: Andrey Gura
            Assignee: Andrey Gura
             Fix For: 2.8


Current WAL archiver implementation copies full WAL segment to the archive while actual size of the segment can be significantly less then {{maxWalSegmentSize}} (segment files are preallocated for max possible segment size). 

In order to reduce disk space consuming we need copy only actual data of segment using {{SWITCH_SEGMENT_RECORD}} as marker. It will require some kind of WAL iterator implementation that will just copy WAL records using information about record size without records deserialization.



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