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From: Alexey Goncharuk <alexey.goncharuk@gmail.com>
Date: Wed, 5 Apr 2017 15:14:27 +0300
Message-ID: <CABDss3iyT6c804A=81Vh6Dsujd5xDfS=4BX+pUj7+BObCwLgmQ@mail.gmail.com>
Subject: Re: one point optimisation
To: dev@ignite.apache.org
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archived-at: Wed, 05 Apr 2017 12:14:34 -0000

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This optimization does not work when near cache is enabled because we need
the same ordering on near nodes. You should see the expected number of
messages with near cache disabled.

2017-04-05 15:09 GMT+03:00 ALEKSEY KUZNETSOV <alkuznetsov.sb@gmail.com>:

> yes
>
> =D1=81=D1=80, 5 =D0=B0=D0=BF=D1=80. 2017 =D0=B3. =D0=B2 15:07, Alexey Gon=
charuk <alexey.goncharuk@gmail.com>:
>
> > Do you have a near cache enabled?
> >
> > 2017-04-05 15:00 GMT+03:00 ALEKSEY KUZNETSOV <alkuznetsov.sb@gmail.com>=
:
> >
> > > The test shows as follows:
> > >             assertMessageCount(GridNearTxPrepareRequest.class, 1);
> > >             assertMessageCount(GridDhtTxPrepareRequest.class, 1);
> > >             assertMessageCount(GridDhtTxPrepareResponse.class, 1);
> > >             assertMessageCount(GridNearTxPrepareResponse.class, 1);
> > >             assertMessageCount(GridNearTxFinishRequest.class, 1);
> > >             assertMessageCount(GridDhtTxFinishRequest.class, 0);
> > >             assertMessageCount(GridNearTxFinishResponse.class, 1);
> > >
> > > =D1=81=D1=80, 5 =D0=B0=D0=BF=D1=80. 2017 =D0=B3. =D0=B2 14:53, Alexey=
 Goncharuk <
> alexey.goncharuk@gmail.com
> > >:
> > >
> > > > Aleksey,
> > > >
> > > > Can you elaborate on which of the extra messages you observe?
> > > >
> > > > --AG
> > > >
> > > > 2017-04-04 14:17 GMT+03:00 ALEKSEY KUZNETSOV <
> alkuznetsov.sb@gmail.com
> > >:
> > > >
> > > > > any thoughts on one phase commit realization ?
> > > > >
> > > > > =D0=BF=D0=BD, 3 =D0=B0=D0=BF=D1=80. 2017 =D0=B3. =D0=B2 19:35, AL=
EKSEY KUZNETSOV <
> > > alkuznetsov.sb@gmail.com
> > > > >:
> > > > >
> > > > > > I've attached test that prints messages exchange . Which shows =
us
> > > that
> > > > > > there are more messages then you declared in article. Perhaps,
> > > > > > implementation has changed.
> > > > > > I created it on base of IgniteOnePhaseCommitNearSelfTest
> > > > > >
> > > > > > =D0=BF=D0=BD, 3 =D0=B0=D0=BF=D1=80. 2017 =D0=B3. =D0=B2 19:03, =
Dmitriy Setrakyan <
> > dsetrakyan@apache.org
> > > >:
> > > > > >
> > > > > > Aleksey,
> > > > > >
> > > > > > The blog describes the 1-phase commit at a high level, but I am
> > still
> > > > > > curious about the differences you found. Can you share them her=
e?
> > > > > >
> > > > > > D.
> > > > > >
> > > > > > On Mon, Apr 3, 2017 at 2:11 AM, ALEKSEY KUZNETSOV <
> > > > > > alkuznetsov.sb@gmail.com>
> > > > > > wrote:
> > > > > >
> > > > > > > Regarding IgniteOnePhaseCommitNearSelfTest test , ignite's on=
e
> > > phase
> > > > > > > optimisation works not as you said.
> > > > > > > I attached picture of message exchange. There are partial
> prepare
> > > > phase
> > > > > > > exists, along with finish phase.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > =D0=BF=D0=BD, 3 =D0=B0=D0=BF=D1=80. 2017 =D0=B3. =D0=B2 10:55=
, Christos Erotocritou <
> > > > > christos@gridgain.com
> > > > > > >:
> > > > > > >
> > > > > > >> As far as I know a partition is always allocated to a specif=
ic
> > > node
> > > > > and
> > > > > > >> does not span nodes. Ignite has default 1024 partitions on
> start
> > > > that
> > > > > > are
> > > > > > >> split equally across nodes.
> > > > > > >>
> > > > > > >> > On 3 Apr 2017, at 08:10, ALEKSEY KUZNETSOV <
> > > > > alkuznetsov.sb@gmail.com>
> > > > > > >> wrote:
> > > > > > >> >
> > > > > > >> > in ur blog u texted belonging to the same partition is
> > nessesary
> > > > > for 1
> > > > > > >> > phase commit. But its not guarantee belonging to the same
> > node.
> > > > > > >> Partition
> > > > > > >> > may span many nodes
> > > > > > >> >
> > > > > > >> > =D0=B2=D1=81, 2 =D0=90=D0=BF=D1=80 2017 =D0=B3., 13:46 ALE=
KSEY KUZNETSOV <
> > > > > alkuznetsov.sb@gmail.com
> > > > > > >:
> > > > > > >> >
> > > > > > >> >> thank u !
> > > > > > >> >>
> > > > > > >> >> =D0=BF=D1=82, 31 =D0=9C=D0=B0=D1=80 2017 =D0=B3., 21:06 D=
enis Magda <dmagda@apache.org>:
> > > > > > >> >>
> > > > > > >> >> Here is a good blog post about 1phase commit impl in Igni=
te
> > and
> > > > its
> > > > > > >> >> advantages:
> > > > > > >> >>
> > > > > > >> >> http://gridgain.blogspot.com/
> 2014/09/one-phase-commit-fast-
> > > > > > >> transactions-for.html
> > > > > > >> >> <
> > > > > > >> >> http://gridgain.blogspot.com/
> 2014/09/one-phase-commit-fast-
> > > > > > >> transactions-for.html
> > > > > > >> >>>
> > > > > > >> >>
> > > > > > >> >> Took a reference to it from there:
> > > > > > >> >>
> > > > > > >> >> https://apacheignite.readme.io/docs/transactions#section-
> > > > > > >> two-phase-commit-2pc
> > > > > > >> >> <
> > > > > > >> >> https://apacheignite.readme.io/docs/transactions#section-
> > > > > > >> two-phase-commit-2pc
> > > > > > >> >>>
> > > > > > >> >>
> > > > > > >> >> =E2=80=94
> > > > > > >> >> Denis
> > > > > > >> >>
> > > > > > >> >>> On Mar 31, 2017, at 12:27 PM, Dmitriy Setrakyan <
> > > > > > >> dsetrakyan@apache.org>
> > > > > > >> >> wrote:
> > > > > > >> >>>
> > > > > > >> >>> On Fri, Mar 31, 2017 at 9:25 AM, ALEKSEY KUZNETSOV <
> > > > > > >> >> alkuznetsov.sb@gmail.com
> > > > > > >> >>>> wrote:
> > > > > > >> >>>
> > > > > > >> >>>> Igniters! What is the point of one phase optimisation?
> > > > > > >> >>>>
> > > > > > >> >>>
> > > > > > >> >>> Performance
> > > > > > >> >>
> > > > > > >> >> --
> > > > > > >> >>
> > > > > > >> >> *Best Regards,*
> > > > > > >> >>
> > > > > > >> >> *Kuznetsov Aleksey*
> > > > > > >> >>
> > > > > > >> > --
> > > > > > >> >
> > > > > > >> > *Best Regards,*
> > > > > > >> >
> > > > > > >> > *Kuznetsov Aleksey*
> > > > > > >>
> > > > > > > --
> > > > > > >
> > > > > > > *Best Regards,*
> > > > > > >
> > > > > > > *Kuznetsov Aleksey*
> > > > > > >
> > > > > >
> > > > > > --
> > > > > >
> > > > > > *Best Regards,*
> > > > > >
> > > > > > *Kuznetsov Aleksey*
> > > > > >
> > > > > --
> > > > >
> > > > > *Best Regards,*
> > > > >
> > > > > *Kuznetsov Aleksey*
> > > > >
> > > >
> > > --
> > >
> > > *Best Regards,*
> > >
> > > *Kuznetsov Aleksey*
> > >
> >
> --
>
> *Best Regards,*
>
> *Kuznetsov Aleksey*
>

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