What I meant was, what's the fastest way to check for documents with duplicate id's ?
On Thu, Aug 30, 2012 at 3:00 PM, Danny Sinang <[email protected]> wrote: > Can anyone recommend a fast way to check for duplicate id's ? > > On Thu, Aug 30, 2012 at 2:06 PM, Geert Josten <[email protected]>wrote: > >> That read-locks are URI locks, not fragment locks is something I didn't >> know. Sounds excellent, should have known earlier.. >> >> And now the internal code MarkLogic uses to generate id's for all its >> internal objects makes much more sense too.. >> >> Mike wrote: >> > To put it more simply: how are you going to guarantee the uniqueness of >> the URI, if not by checking to see if it exists? >> >> I can only think of one other way, by using a write lock on a fixed uri >> (or several fixed uri's), like always doing a >> xdmp:document-insert('/assets/lock', <x/>) before deriving a new uri. But >> that slows down creation processes, likely more than using the read-lock >> approach. :-/ >> >> That leaves perhaps only one thing that need attention. If you already >> have many documents, then the likeliness random comes up with an id that >> already exists increases. The average number of attempts it needs to take >> to find an unused number increases over time too. Luckely the range of >> random is very large (20 digits), so you really need quite a very lot of >> documents to even get close to 1/100000 of the space.. >> >> :) >> >> Grtz, >> Geert >> _______________________________________________ >> General mailing list >> [email protected] >> http://developer.marklogic.com/mailman/listinfo/general >> > >
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