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Message-ID: <20061109214122.51950.qmail@web31704.mail.mud.yahoo.com>
Date: Thu, 9 Nov 2006 13:41:22 -0800 (PST)
From: Aloke Agarwal <agarwal_aloke@yahoo.com>
Subject: Re: Any Suggestions for Implementing Global Revision/Change Set
To: users@jackrabbit.apache.org
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Thanks for the suggestion that solved our issue. Our time went down by 2 or=
der of magnitude.=0A=0AThanks=0AAloke=0A =0A=0A----- Original Message ----=
=0AFrom: Paul J DeCoursey <paul@decoursey.net>=0ATo: users@jackrabbit.apach=
e.org=0ASent: Thursday, November 2, 2006 5:50:32 PM=0ASubject: Re: Any Sugg=
estions for Implementing Global Revision/Change Set=0A=0AAloke Agarwal wrot=
e:=0A> Hi,=0A>=0A> We are evaluation jackrabbit for one of our project. The=
 project is to provide an XML repository with the following functional requ=
irements:=0A>=0A> 1.  Ability to have different document types to be stored=
 in repository. (For example: /toys/action/x.xml, book/x etc).=0A> 2. All t=
he documents stored are all xml documents which needs to be querieable thro=
ugh xquery (for example get all book where book.author etc).=0A> 3. Ability=
 to store all documents as versionable.=0A> 4. Ability to retrieve document=
s based on global revision. The concept of global revision is similar to "s=
ubversion" concept where a user can submit x number of documents and the sy=
stem returns a unique id back to the user. The user can then use this id to=
 get "any" document in the repository at that point in time not just what h=
e/she checked in.=0A>=0A> Based on the above requirement we were evaluating=
 jackrabbit and have an initial implementation of "globalrevision" and xpat=
h like capability. Our solution is as follows:=0A>=0A> We have root node ca=
lled:=0A>=0A>   =0AWhy does each node need the globalrevisionid? why not ju=
st keep that ID =0Aon the root node?=0A=0A> root (mix:versionable)=0A>     =
- child1=0A>         -property called (globalrevisionid)=0A>     - child 2=
=0A>         -property called (globalrevisionid)=0A>=0A>     - child 3=0A> =
        -property called (globalrevisionid)=0A>=0A>=0A> globalrevisionroot =
(mix: versionable)=0A>     - globalrevision1=0A>     - globalrevision2=0A>=
=0A> So every time there is a commit we save the nodes that are checked in =
and then walk the whole tree to set the property called "globalrevisionid" =
on all the nodes under root at that point in time. =0A>=0A> Our problem is =
as follows:=0A> 1. The performance is really bad with a repository with 500=
 nodes it takes 10 minutes after every save to put this globalrevision prop=
erty on all the nodes.=0A>   =0AIf you move the revisionid to a single node=
 then this shouldn't be an issue.=0A> 2. It does a checkout/set property/ch=
eckin in all the root nodes and hence creates an unneccesary revision in th=
e repository.=0A> 3. The lucene search indexing takes a long time everytime=
=0A>=0A>=0A> Has anyway tried implementing something similar to what we are=
 trying to do?. Is there any better way to do what we are trying to do in J=
CR.=0A>=0A>=0A>  Thanks=0A> Aloke=0A>=0A>=0A>=0A>   =0A=0AI think that have=
 1 instance of the revisionid will solve all your issues.=0A=0A=0A=0A=0A=0A=
=0A=0A=0A =0A______________________________________________________________=
______________________=0AYahoo! Music Unlimited=0AAccess over 1 million son=
gs.=0Ahttp://music.yahoo.com/unlimited
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