[Date Prev][Date Next] [Chronological] [Thread] [Top]

Re: [ldapext] Re: I-D ACTION:draft-sermersheim-ldap-csn-02.txt

A couple of concerns were raised about using fractional seconds in the timestamp portion of the CSN. Mainly, that they do not always increase monotonically; some systems will decrement while adjusting the clock (e.g. using NTP?). The draft-ietf-ldup-model document specifically excluded fractional seconds; I think we need to continue with that restriction here.

Also wrt timestamps, expressing an implementation preference: I would like to see the timestamps restricted to UTC. As I see it, use of local time is really an issue of user-friendliness. As such, it's a matter for clients and user interfaces to deal with, not servers. And storing local time in the server is no friendlier if the client is querying from a remote timezone. I.e., the client must always be prepared to translate the server's timestamp into its localtime regardless, so storing localtime in the server doesn't save anything. It actually makes it harder for clients that are searching for CSNs greater than a specific time. Even if the server is "consistent" in its use of localtime - e.g., we just changed off of Daylight Savings Time, so there's an hour's worth of timestamps that overlap each other except for their offset. In this case, it's more developer-friendly to use UTC consistently.

Internet-Drafts@ietf.org wrote: 
A New Internet-Draft is available from the on-line Internet-Drafts directories.


Title : The LDAP Change Sequence Number
Author(s) : H. Chu, J. Sermersheim
Filename : draft-sermersheim-ldap-csn-02.txt
Pages : 16
Date : 2005-10-26

This document defines a syntax schema element for the Lightweight Directory Access Protocol ([LDAP]) which is used to hold a Change Sequence Number (CSN). In general, a change sequence number represents the place and time that a directory entity was changed. It may be used by various attributes for various LDAP replication, and synchronization applications.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-sermersheim-ldap-csn-02.txt


--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  OpenLDAP Core Team            http://www.openldap.org/project/

_______________________________________________
Ldapext mailing list
Ldapext@ietf.org
https://www1.ietf.org/mailman/listinfo/ldapext