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https://issues.apache.org/jira/browse/DIRSERVER-918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Emmanuel Lecharny updated DIRSERVER-918:
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Affects Version/s: 1.0.2
1.5.0
Fix Version/s: pre-2.0
Postponed to 2.0
> Storing DN within attributes
> ----------------------------
>
> Key: DIRSERVER-918
> URL: https://issues.apache.org/jira/browse/DIRSERVER-918
> Project: Directory ApacheDS
> Issue Type: Improvement
> Affects Versions: 1.0.2, 1.5.0
> Reporter: Emmanuel Lecharny
> Fix For: pre-2.0
>
>
> Attributes are stored into the Master table, and the associated DN is stored
> in another table. If we store the LdapDN into an object containing also the
> Attributes, we will avoid many DN parsing in the server :
> - the ReferralService tries to check if a DN is a referral, and has to parse
> the UpDN found into the updn index
> - the CollectiveAttributeService is also doing this normalization
> - the DefaultAuthorizationService method isSearchable method normalize a DN
> which is stored into the invocation stack : this DN has already been parsed
> - the searchResponseIterator constructor parse the DN too.
> All those useless normalization could be avoided if we store the normalized
> DN into the backend. The gain is important : on a search test, search for
> 2705 entries, it cost 12% of all the time spent into the server. This is
> around 4 times the initial DN parsing cost (in the codec).
> Now, if we store the normalized form, we will have to pay a price for it :
> more time to deserialize this added element, which is one of the most costly
> operation (15% of all the time).
> Another option could be to parse this updn only once, and to set it into the
> searchResult object which is created.
> As we are using the javax.naming.Searchresult object, which stores the DN as
> a String, we will then have to create a new class to handle a LdapDN instead
> of a String.
> The expected gain should be around 10%, which is far from being negligible.
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