[jira] [Updated] (NIFI-9364) ExecuteStateless performance suffers if using "Content Storage Strategy" of "Store Content on Disk"

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

     [ https://issues.apache.org/jira/browse/NIFI-9364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Payne updated NIFI-9364:
-----------------------------
    Status: Patch Available  (was: Open)

> ExecuteStateless performance suffers if using "Content Storage Strategy" of "Store Content on Disk"
> ---------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-9364
>                 URL: https://issues.apache.org/jira/browse/NIFI-9364
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: 1.15.0
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Major
>
> When I tested performance of ExecuteStateless storing content on heap, performance was great. But I changed to store content on disk, expecting performance to drop some. But I saw a HUGE performance drop - about an order of magnitude. It appears to be because when copying the FlowFile content into the processor's Content Repository, the {{ContentOutputStream}} that is used to write content to disk does not override the parent {{FilterOutputStream's write(byte[], int offset, int len)}} method. Instead, it just inherit's the parent's implementation. The parent implementation performs horribly, calling {{void write(int b)}} for each byte in the given buffer. which means we write each byte to the underlying FileOutputStream as an individual operation.



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