Re: [bailey-developers] SF.net SVN: bailey: [17] trunk/src

[Yonik S. <yo...@ap...>]

I'm trying to catch up with all the activity... please ignore if this
has been addressed in later emails.

On Wed, Apr 2, 2008 at 1:36 PM, Doug Cutting <cu...@ap...> wrote:
>  Second, I don't yet see a way around checking versions when documents
>  are added or deleted.  The ugliest bit is that we have to keep track of
>  the version of every document that's ever been deleted, in case a
>  long-offline node comes online and reports a stale addition.  That table
>  could grow without bound.  Sigh.  Do you see a way around this?
>
>  Perhaps a node could discard old deletions after a time, keeping track
>  of the log entry number of the oldest retained deletion.  Attempts to
>  sync starting with an older entry number should be rejected and should
>  trigger a complete copy-based replacement of the stale index.

Right, this seems like the right approach.  We shouldn't have to
support incremental syncs forever.

> The
>  hazard is that, if a document is added to a single node, then that node
>  goes offline for a long time, then, when it comes online, the addition
>  will be lost.  Not great.

If a document is added to a single node, it could be lost permanently
anyway (node may never come back).  That's why an add should go to
multiple nodes.

-Yonik