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https://issues.apache.org/jira/browse/FLUME-1966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622684#comment-13622684
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Brock Noland commented on FLUME-1966:
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Thanks Roshan.
> FileChannel should intelligently decide on default minimumRequiredSpace
> -----------------------------------------------------------------------
>
> Key: FLUME-1966
> URL: https://issues.apache.org/jira/browse/FLUME-1966
> Project: Flume
> Issue Type: Bug
> Components: File Channel
> Reporter: Brock Noland
>
> Right now the default minimumRequiredSpace is set to 500MB. As opposed to
> having a fixed number, I think we should have some kind of algorithm that
> finds a proper default based on the disk in question. This assumes the user
> has not set minimumRequiredSpace, in which case the default calcuated below
> will be ignored.
> The issue is we would like a large minimumRequiredSpace so we can be sure to
> stop writing before a disk fills up in production, where disks are generally
> going to be quite large. However, we don't want it so large that the file
> channel doesn't work out of the box when testing it on VMs or laptops.
> Something like this might work:
> default = max(min(10% disk capacity, 5GB), 500MB)
> Basically we always set the default to a minimum of 500MB. In production,
> typically we have 500GB or larger disks we'll set it to 5GB. On VM/laptop
> machines with smaller disks, we'll set it to 10% the disk or 500MB whichever
> is larger.
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