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Re: how issue-2897 branch solves reflective merges?

From: Mark Phippard <markphip_at_gmail.com>
Date: Mon, 21 Jan 2008 11:55:59 -0500

On Jan 21, 2008 11:25 AM, C. Michael Pilato <cmpilato_at_collab.net> wrote:
> Mark Phippard wrote:
> > On Jan 21, 2008 10:20 AM, Mark Phippard <markphip_at_gmail.com> wrote:
> >> On Jan 11, 2008 2:45 PM, David Glasser <glasser_at_davidglasser.net> wrote:
> >>> My personal preference would be to merge reintegrate to trunk in the
> >>> very near future; then update issue-2897 based on that, then to (on
> >>> the 2897 branch) reimplement the FS API without SQLite (I'll do that),
> >>> while concurrently folks review Kamesh's libsvn_client changes (not
> >>> the backend, which as I said I'll rewrite). Then merge that back to
> >>> trunk, then remove the SQLite dependency (which also involves
> >>> rewriting the node origin cache on FSFS only, which will be very
> >>> easy... just store them as small files in a directory or something),
> >>> then BRANCH 1.5.
> >> This sounded like a good plan. How are we doing? Step 1 was to get
> >> reintegrate merged to trunk. What is left to do for that to happen?
> >>
> >> Also, are there any opportunities to divide this work up so that it is
> >> not all on your shoulders?
> >
> > Looking at your list again, it looks like a good item that could be
> > taken off your shoulders would be rewriting the node origins cache to
> > not use SQLite. Could you file an issue or post something to dev@
> > that describes how you would do it? Then maybe someone else could do
> > that while you are updating the issue-2897 branch?
> Node-origins in FSFS can be done by writing a single file for each node-id
> which contains the origin value into a 'node-origins' subdirectory. We'd
> probably want to shard that in some fashion -- we have around 5000 origins
> to store for the Subversion source code repository today.

If we have to create an object in the file system for every node in
the repository is this potentially a problem waiting to happen? Are
we going to be greatly increasing the size of the repository and the
demands on the server file system? An svn import of thousands of
files would have to create thousands of these items too right?

Do we have an official goal to remove SQLite as a dependency now?

Mark Phippard
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Received on 2008-01-21 17:56:10 CET

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