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From Vladimir Ozerov <voze...@gridgain.com>
Subject Re: Persistence per memory policy configuration
Date Mon, 02 Oct 2017 08:28:53 GMT

I do not think this is correct approach, because it will be hard to
explain, and you will have to use "Boolean" instead of "boolean" for
DataRegionConfiguration. I do not think we need default "persistence
enabled" for all regions. Instead, we should have "persistence enabled"
flag for default region only. It should not be propagated to custom regions.

On Mon, Oct 2, 2017 at 11:14 AM, Ivan Rakov <ivan.glukos@gmail.com> wrote:

> Guys, I think I got the point now.
> Let's check the final design:
> *DataStorageConfiguration* will have *isDefaultPersistenceEnabled*
> property (default = false), which will be used for enabling persistence in
> default data region.
> *DataRegionConfiguration* will have *isPersistenceEnabled* property, which
> will be used for enabling persistence in corresponding data region. If
> value is not set, value of *DataStorageConfiguration::isDefaultPersistenceEnabled*
> will be used by default.
> Best Regards,
> Ivan Rakov
> On 02.10.2017 7:49, Dmitriy Setrakyan wrote:
>> On Mon, Oct 2, 2017 at 7:46 AM, Denis Magda <dmagda@apache.org> wrote:
>> On Oct 1, 2017, at 4:41 AM, Ivan Rakov <ivan.glukos@gmail.com> wrote:
>>>> 1) You're right. I forgot to include the main flag in
>>> DataRegionConfiguration - *isPersistenceEnabled*. Persistence will be
>>> enabled globally if at least one memory region has this flag set.
>>> I’m confused. Why the persistence should be enabled *globally* if the
>>> purpose is to have it set for a specific region? If it’s enabled for
>>> region
>>> A only, I don’t want to have it activated for region B.
>>> Yes, you are right. By default the persistence will be disabled globally.
>> But we should also give users a way to switch the default behavior from
>> in-memory only (no-persistence) to persistence.

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