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Re: [PATCH] svnadmin copy command(Scanned for viruses: Notes Admin)

From: <vberezniker_at_siuh.edu>
Date: 2003-07-31 18:56:47 CEST

Here is my logic. There are two ways the function can be used. First is
by outside tool that calls svnadmin archive. In this case absolute path
is *the* way, as the tool should not need to know anything about the
repository layout. However, in cases when a manipulation is done by
subversion internals that are aware of the repository structure and needs
to compare logs files between two repositories, then the relative path
would be useful.

In case of my proposed svnadmin copy command when unused log deletion is
requested, I use the following algorithm:

1. Make a copy of everything but /db area.
2. Copy all tables
3. Copy all logs
4. Get a list of unused logs in the source repository.
5. Iterate over unused log list
5a.If log exists at the destination and is the same file, then delete the
log at source

At step 3 absolute log path can be used to make a copy. However, at step
5a since I need to check log file name at two different repositories it is
easier to use log file name only and append it to a "db" paths within each

Logical question I expect here is why not delete all unused log files from
source and be done with it, as hot-backup.py does?

I have a concern about unconditionally deleting unused log files in the
source repository. Imagine the following scenario:
While logs a being copied (step 3) there is repository activity that
causes the latest log to go from used to the unused state (e.g. reached
maximum size limit). If at (step 5) we just delete unused logs we would
delete a log that was not copied fully.

Please correct me if I am overlooking something.

Vladimir Berezniker

Sent by: cmpilato@localhost.localdomain
07/31/2003 12:05 PM
Please respond to cmpilato
        To: <vberezniker@siuh.edu>
        cc: dev@subversion.tigris.org
        Subject: Re: [PATCH] svnadmin copy command(Scanned for
viruses: Notes Admin)

<vberezniker@siuh.edu> writes:

> For starters I would like to submit a patch to libsvn_fs's
> svn_fs_berkeley_archive() functionality.
> First is to change the return type of a function from Berkeley DBs
> list to apr array (apr_array_header_t). Add a new parameter allowing to

> receive only log file names without the absolute path and a parameter
> would include used log files in the list.

I don't really see the need to have the abs-vs.-rel path parameter. I
mean, can we not do the right thing with both? The second parameter,
yes, we need that.

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Received on Thu Jul 31 20:08:49 2003

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