[jira] [Resolved] (NIFI-527) Persistent Prov Repo should compress write-ahead-log files in chunks

["Mark Payne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Payne resolved NIFI-527.
-----------------------------
    Resolution: Fixed

> Persistent Prov Repo should compress write-ahead-log files in chunks
> --------------------------------------------------------------------
>
>                 Key: NIFI-527
>                 URL: https://issues.apache.org/jira/browse/NIFI-527
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>             Fix For: 0.1.0
>
>         Attachments: 0001-NIFI-527-Refactored-the-serialization-format-of-the-.patch, 0002-NIFI-527-More-performance-improvements-including-reu.patch, 0003-NIFI-527-Cleaned-up-log-messages.patch, 0004-NIFI-527-Added-unit-test-to-verify-backpressure.patch
>
>
> Currently when we rollover a prov log, we compress the entire thing. This means that when we want to jump to a particular offset we have to open a GZIPInputStream and read through all of the data. If we instead compress the logs in chunks, we can actually jump to a particular chunk using FileInputStream.skip and then open a GZIPInputStream from there. Currently, this is by far the biggest bottleneck in the prov repo when doing queries.



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