Mailing-List: contact users-help@myfaces.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "MyFaces Discussion" <users@myfaces.apache.org>
Received-SPF: pass (nike.apache.org: local policy includes SPF record at
 spf.trusted-forwarder.org)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.de;
  h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding;
  b=nc8LqWy50dVNhvFazxmHBOwlmfOOoo2JojheoCVJBXwwt0QOv7TVGUq0q3D8Q+mNi5B2KpZAp4yFpdaBMJPCGAPeT/NLo5gVOAhCK27M98MYHAUNdahtnNSG6uwRFvR+vip+tQd2TkjsIiXd/a7isGrNN7lMnbXON97N0LLBNs8=;
References: 
 <CAGV1rDKCQsyQitoGVdVu2gmeTKwGFY3nW+n-436Coi=zXg2WRw@mail.gmail.com>
	<CAPyf0gdZ=RwyOSiiuut2jZmmg8RDq-RNVxNcL8w65fO9aMCTvQ@mail.gmail.com>
 <CAGV1rDJp_sVDAoJuigpQWfO5wkUiKqVoML1EWFZ=sxtHsTNZkQ@mail.gmail.com>
Message-ID: <1382271964.21407.YahooMailNeo@web28901.mail.ir2.yahoo.com>
Date: Sun, 20 Oct 2013 13:26:04 +0100 (BST)
From: Mark Struberg <struberg@yahoo.de>
Reply-To: Mark Struberg <struberg@yahoo.de>
Subject: Re: [OT but still JSF]: Clustering, session replication,
 and database, too
To: MyFaces Discussion <users@myfaces.apache.org>
In-Reply-To: 
 <CAGV1rDJp_sVDAoJuigpQWfO5wkUiKqVoML1EWFZ=sxtHsTNZkQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

Try to avoid any remoting. Regardless whether remote EJB or even worse SOAP=
. The power it takes to transfer all your state to a different node is usua=
lly more than it takes to render your JSF pages. If you have performance is=
sues then rather scale-out by adding another node and have a haproxy or any=
 other load balancer with sticky session in front of it. =0A=0ALieGrue,=0As=
trub=0A=0A=0A=0A=0A----- Original Message -----=0A> From: "Howard W. Smith,=
 Jr." <smithh032772@gmail.com>=0A> To: MyFaces Discussion <users@myfaces.ap=
ache.org>=0A> Cc: =0A> Sent: Sunday, 20 October 2013, 13:07=0A> Subject: Re=
: [OT but still JSF]: Clustering, session replication, and database, too=0A=
> =0A> interesting response, Jose', thanks!=0A> =0A> for some time, I thoug=
ht that it might be best to have separate server=0A> (tomee + @EJB/DTO's + =
tomcat's jdbc + database) which is/becomes the=0A> database tier. I guess I=
 need to learn how to do/make remote calls to EJB=0A> server from JSF web l=
ayer like you are doing.=0A> =0A> i wonder if this is the typical/common/mo=
st-recommended-and-preferred=0A> solution.=0A> =0A> hmmm, avoid database re=
plication.=0A> =0A> i have even seen tomcat committer (mark thomas slidesho=
w/document on=0A> people.apache.org) mention that clustering your app shoul=
d be avoided, if=0A> possible (or only used, if necessary). :)=0A> =0A> =0A=
> =0A> =0A> On Sun, Oct 20, 2013 at 1:30 AM, Jos=E9 Luis Cetina =0A> <maxto=
rzito@gmail.com>wrote:=0A> =0A>>  I have a early experience with a "mini cl=
uster" 2 servers using =0A> tomee +=0A>>  memcached for session replication=
+ sticky session but using 1 only server=0A>>  for database (i mean i dont =
use db replication). My jsf apps (ear) are=0A>>  running in this mini clust=
er everithyng works fine except when i shutdown=0A>>  tomee for do a re dep=
loy i always see an xhtml parser error. I could never=0A>>  configure it se=
ssion replication with tomcat.=0A>> =0A>>  In your web apps just use distri=
butable tag in web.xml and all other are=0A>>  configuration. You can use m=
emcached to not only session replication even=0A>>  thougth for savr inform=
ation of your app and with this you can share=0A>>  information between you=
r nodes and with this you dont persist information=0A>>  that could be "tra=
nsient".=0A>>  The result is incredible.=0A>> =0A>>  As i sayed i could nev=
er configure session replication with tomcat,=A0 the=0A>>  only way i could=
 do it is using memcached session replication.=0A>> =0A>>  I dont know if a=
nybody here have any experience with this.=0A>> =0A>>  Regards Howard.=0A>>=
 =A0 El 19/10/2013 22:49, "Howard W. Smith, Jr." =0A> <smithh032772@gmail.c=
om>=0A>>  escribi=F3:=0A>> =0A>>  > I had a question or two, since I have b=
een reading "Java Summit -=0A>>  Pitfalls=0A>>  > in EE"[1] provided by Mar=
k Struberg while having a discussion on =0A> tomee=0A>>  user=0A>>  > list.=
=0A>>  >=0A>>  > The following page stated the following:=0A>>  >=0A>>  > P=
age 134=0A>>  > Clustering=0A>>  >=0A>>  > * We use 'asymmetric clustering'=
=0A>>  > * use sticky sessions=0A>>  > * backup away the session to a memca=
ched after each=0A>>  > request=0A>>  > * do not replicate the session over=
 to other nodes!=0A>>  > * Session-Replication always in node pairs.=0A>>  =
> * only restore the session from the memcached if a failover=0A>>  > happe=
ned=0A>>  > * msm can be integrated into OWB:=0A>>  > http://code.google.co=
m/p/memcached-session-manager/=0A>>  >=0A>>  > Since it says, 'We use asymm=
etric clustering' and other =0A> suggestions were=0A>>  > made, I found it =
appropriate to direct my question(s) to MyFaces =0A> 'JSF'=0A>>  user=0A>> =
 > list and committers.=0A>>  >=0A>>  > is there some type of blog (or two =
or three) available that discuss =0A> how=0A>>  to=0A>>  > properly cluster=
 a tomcat/tomee/openwebbeans/myfaces JSF web app? =0A> also,=0A>>  how=0A>>=
  > is the database replicated? I don't ever see database =0A> cluster/repl=
ication=0A>>  > discussed by JSF developers; i recently had to search for d=
atabase=0A>>  cluster=0A>>  > and saw 'replication', which is something i h=
ave not had to =0A> worry about=0A>>  > since my previous work involved dat=
abase teams while i was doing=0A>>  > front-end/GUI software.=0A>>  >=0A>> =
 > now that i am doing java ee and jsf, i would love to know how to do=0A>>=
  > database clustering and/or replicating database while clustering JSF=0A=
>>  > webapp. Of course, right now, i only have one=A0 tomee which referenc=
es=0A>>  > 'apache' derby (which is performing well, but I would love to =
=0A> get my feet=0A>>  > wet and cluster my web app + database). i did sear=
ch derby's mail =0A> list=0A>>  > archives and i learned about sequioa and =
HA-JDBC (High-Availability=0A>>  JDBC).=0A>>  >=0A>>  > i was hoping to get=
 an answer from MyFaces 'JSF' =0A> users/committers...based=0A>>  > on thei=
r experience. I think someone told me that they use mysql=0A>>  > (clusteri=
ng); my preference is still 'apache' derby (smile). =0A> please=0A>>  > rem=
ember, i'm wondering if any blogs are available that discuss=0A>>  clusteri=
ng=0A>>  > tomcat (preference =3D tomee) + JSF web app (with database) + me=
mcached=0A>>  > session manager.=0A>>  >=0A>>  > Thomas has already started=
 writing a blog[2] about this. I'm =0A> looking=0A>>  > forward to seeing s=
ample config for it all (if available). :)=0A>>  >=0A>>  > [1]=0A>>  >=0A>>=
  >=0A>> =0A> http://people.apache.org/~struberg/eesummit2013/Java%20EE%20S=
ummit%20-%20pitfalls%20in%20EE.pdf=0A>>  >=0A>>  > [2]=0A>>  >=0A>>  >=0A>>=
 =0A> http://tandraschko.blogspot.com/2013/09/session-replication-clusterin=
g-failover.html=0A>>  >=0A>> =0A>