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From Pavel Tupitsyn <ptupit...@apache.org>
Subject Re: Persistence per memory policy configuration
Date Mon, 16 Oct 2017 13:53:52 GMT
Igniters, another thing to consider:

DataRegionConfiguration.SwapFilePath should be SwapPath,
since this is actually not a single file, but a directory path.

On Fri, Oct 13, 2017 at 7:53 PM, Denis Magda <dmagda@apache.org> wrote:

> Seems I've got what you’re talking about.
>
> I’ve tried to change the root directory (*persistencePath*) and saw that
> only data/indexes were placed to it while wal stayed somewhere in my work
> dir. It works counterintuitive and causes non productive discussions like
> we are in arguing about *persistencePath* or *storagePath*. Neither name
> fits this behavior.
>
> My suggestion will be the following:
> - *persistencePath* refers to the path of all storage files (data/indexes,
> wal, archive). If the path is changed *all the files* will be under the new
> directory unless *setWalPath* and *setWalArchivePath* are set *explicitly*.
> - *setWalPath* overrides the default location of WAL (which is
> setPersistencePath)
> - *setWalArchivePath* overrides the default location of the archive (which
> is again has to be setPersistencePath).
>
> If we follow this approach the configuration and behavior becomes vivid.
> Thoughts?
>
> —
> Denis
>
> > On Oct 13, 2017, at 1:21 AM, Ivan Rakov <ivan.glukos@gmail.com> wrote:
> >
> > Denis,
> >
> > Data/index storage and WAL are located under the same root by default.
> > However, this is not mandatory: *storagePath* and *walPath* properties
> can contain both absolute and relative paths. If paths are absolute,
> storage and WAL can reside on different devices, like this:
> >
> >> storagePath: /storage1/NMVe_drive/storage
> >> walPath: /storage2/Big_SSD_drive/wal
> > We even recommend this in tuning guide: https://apacheignite.readme.
> io/docs/durable-memory-tuning
> >
> > That's why I think *persistencePath* is misleading.
> >
> > Best Regards,
> > Ivan Rakov
> >
> > On 13.10.2017 5:03, Dmitriy Setrakyan wrote:
> >> On Thu, Oct 12, 2017 at 7:01 PM, Denis Magda <dmagda@gridgain.com>
> wrote:
> >>
> >>> From what I see after running an example they are under the same root
> >>> folder and in different subdirectories. The root folder should be
> defined
> >>> by setPersistencePath as I guess.
> >>>
> >> If that is the case, then you are right. Then we should not have
> >> storagePath or WalPath, and store them both under "persistencePath"
> root.
> >> However, I would need Alexey Goncharuk or Ivan Rakov to confirm this.
> >>
> >
>
>

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