Re: Node scheme, how much storage for metadata?

From: Lee Iverson (
Date: Fri Feb 16 2001 - 07:56:59 PST

In message <001301c09826$19a99fe0$2312d1d1@computer>, "N. C a r r o l l" writes
>Lee, how much storage would you anticipate metadata
>needing in the node/path scheme?
>E.g., A DKR consisting of:
>100 straight-text HTML pages
>of 20kb each
>and 2kb each of added author metadata
>with ? grains specified (lines, characters?)
>= [Kb total storage?]

Well, each node has mandatory fields for (forgetting any?):
o ID
o changed & changedBy
o created & createdBy (maybe only on head versions)
o changedBelow & changedBelowBy (maybe only on structuring nodes)
o permission

Now, all of these are single-word additions to node size (either 32 bits for
id or timestamp or a pointer to user or permission record).
So that's 32 bytes per node, not generally too bad.

>(I'm ignoring path data storage here.)

Don't ignore it. Put simply, Paths are client-side, transient objects --
they are context holders. Path Descriptions would, however, be stored in
the Repository.

Lee Iverson SRI International 333 Ravenswood Ave., Menlo Park CA 94025 (650) 859-3307

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