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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: Eviction Events with offheap values
Date Fri, 20 May 2016 00:06:23 GMT
Andrey, I think there should be an eviction event fired, no? Can you please
file a ticket on it?

Thanks,
D.

On Wed, May 18, 2016 at 10:16 AM, Andrey Gura <agura@gridgain.com> wrote:

> As I can see from GridCacheSwapManager code Ignite doesn't fire eviction
> events from offheap.
>
> On offheap evict GridCacheSwapManager does teh following:
>
> 1. Updates onOffheapEvict metric if enabled
> 2. Fires EVT_CACHE_OBJECT_SWAPPED event if swap enabled.
>
> On Tue, May 17, 2016 at 3:44 AM, Dmitriy Setrakyan <dsetrakyan@apache.org>
> wrote:
>
> > Guys,
> >
> > Resending this question to the dev list. Doesn’t Ignite fire an eviction
> > event whenever an entry is evicted from off-heap memory?
> >
> > D.
> >
> > ---------- Forwarded message ----------
> > From: Alexei Scherbakov <alexey.scherbakoff@gmail.com>
> > Date: Mon, May 16, 2016 at 1:33 AM
> > Subject: Re: Eviction Events with offheap values
> > To: user@ignite.apache.org
> >
> >
> > Andrey, thanks for the clarification.
> >
> > Abraham, it seems EvictionPolicy is not appropriate solution for your
> case.
> > BTW, why user session expiration logic is related to cache size ?
> > In case user sessions expire by timeout the more appropriate solution
> would
> > be listening to
> > EVT_CACHE_OBJECT_EXPIRED event.
> > You can also set eager expiration by calling
> > CacheConfiguration.setEagerTtl(true)
> > to make Ignite expire values automatically.
> >
> > Did this help?
> >
> >
> > 2016-05-13 19:49 GMT+03:00 Andrey Gura <agura@gridgain.com>:
> >
> > > Alexei, Abraham,
> > >
> > > Eviction policy configuration doesn't make sense for OFFHEAP_TIERED
> mode.
> > > Eviction policy works only for on heap entries in order to evict
> entries
> > to
> > > offheap.
> > >
> > > For eviction of entries from offheap memory Ignite internaly uses other
> > > LRU eviction policy and there is no way to change this behaviour via
> > > configuration.
> > >
> > > On Thu, May 12, 2016 at 7:14 PM, Alexei Scherbakov <
> > > alexey.scherbakoff@gmail.com> wrote:
> > >
> > >> Hi,
> > >>
> > >> I was not able to reproduce your case.
> > >> In my test I have correct old value on eviction event.
> > >> Please provide a reproducer.
> > >>
> > >> BTW: what are you trying to accomplish? Generally events are not very
> > >> good for cluster performance and may not be delivered in case of the
> > >> listener node failure.
> > >>
> > >> 2016-05-10 9:26 GMT+03:00 abraham <a.mueller@qriously.com>:
> > >>
> > >>> Hi,
> > >>>
> > >>> I am re-posting an earlier message to which I did not get any replies
> > >>> because I was not subscribed to the mailing list:
> > >>>
> > >>> I am trying to get the values from the eviction events. This works
> fine
> > >>> with
> > >>> the ONHEAP_TIERED version but not with OFFHEAP_VALUES and
> > OFFHEAP_TIERED
> > >>> -
> > >>> in that cases the hasOldValue is true but the actual value is null.
> > >>>
> > >>> What we are trying to accomplish is to persist entries to a database
> > only
> > >>> when they either get removed, expired or evicted because the max
> cache
> > >>> size
> > >>> is reached and it looks like those events are the only way to
> > accomplish
> > >>> this.
> > >>>
> > >>> A quick glance at the code would suggest that in the
> > >>> org.apache.ignite.internal.processors.cache.GridCacheEvictionManager
> > one
> > >>> could replace line 708 from
> > >>>
> > >>> CacheObject oldVal = recordable ? entry.rawGet() : null;
> > >>>
> > >>> to
> > >>>
> > >>> CacheObject oldVal = recordable ? entry.rawGetOrUnmarshal(false) :
> > null;
> > >>>
> > >>> to get the values attached to the events. Would that work?
> > >>>
> > >>> Thanks,
> > >>>
> > >>> Abraham
> > >>>
> > >>>
> > >>>
> > >>> --
> > >>> View this message in context:
> > >>>
> >
> http://apache-ignite-users.70518.x6.nabble.com/Eviction-Events-with-offheap-values-tp4853.html
> > >>> Sent from the Apache Ignite Users mailing list archive at Nabble.com.
> > >>>
> > >>
> > >>
> > >>
> > >> --
> > >>
> > >> Best regards,
> > >> Alexei Scherbakov
> > >>
> > >
> > >
> > >
> > > --
> > > Andrey Gura
> > > GridGain Systems, Inc.
> > > www.gridgain.com
> > >
> >
> >
> >
> > --
> >
> > Best regards,
> > Alexei Scherbakov
> >
>
>
>
> --
> Andrey Gura
> GridGain Systems, Inc.
> www.gridgain.com
>

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