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From: ALEKSEY KUZNETSOV <alkuznetsov.sb@gmail.com>
Date: Tue, 04 Apr 2017 11:17:29 +0000
Message-ID: <CAKr8Lfwz==Hd6NJ=5gc0-HC=ghjnd5jrc__tdWB07twvz5mONA@mail.gmail.com>
Subject: Re: one point optimisation
To: dev@ignite.apache.org
Content-Type: multipart/alternative; boundary=001a1148407e7afce9054c556ca9
archived-at: Tue, 04 Apr 2017 11:17:44 -0000

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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, ALEKSEY KUZN=
ETSOV <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 Se=
trakyan <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 here?
>
> D.
>
> On Mon, Apr 3, 2017 at 2:11 AM, ALEKSEY KUZNETSOV <
> alkuznetsov.sb@gmail.com>
> wrote:
>
> > Regarding IgniteOnePhaseCommitNearSelfTest test , ignite's one 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 specific node an=
d
> >> 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 ALEKSEY KUZNE=
TSOV <alkuznetsov.sb@gmail.com
> >:
> >> >
> >> >> thank u !
> >> >>
> >> >> =D0=BF=D1=82, 31 =D0=9C=D0=B0=D1=80 2017 =D0=B3., 21:06 Denis Magda=
 <dmagda@apache.org>:
> >> >>
> >> >> Here is a good blog post about 1phase commit impl in Ignite 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*
>
--=20

*Best Regards,*

*Kuznetsov Aleksey*

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