Question

subversion http connections

Asked by: sants_pp

HI experts,
    i have a question regarding subversion. we are using apache dav to access the repositories across the network and we have integrated with LDAP for authentication. when we checkout project, lets say it has 1000 of files, it is generating more than 1000 httpd request and ldap is getting over loaded. Does each files are authenticated in subversion? is there any way to avoid opening http connection for each files.
   any idea or help is highly appreciated

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Asked On
2009-09-18 at 08:27:21ID24743575
Topics

Subversion

,

Linux

,

Unix Operating Systems

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Answers

 

by: ckhsu1977Posted on 2009-09-18 at 11:47:39ID: 25368754

From http://svnbook.red-bean.com/en/1.1/ch06s04.html

Review your setup and see if this can be used.
--snip
Disabling Path-based Checks

The mod_dav_svn module goes through a lot of work to make sure that data you've marked "unreadable" doesn't get accidentally leaked. This means that it needs to closely monitor all of the paths and file-contents returned by commands like svn checkout or svn update commands. If these commands encounter a path that isn't readable according to some authorization policy, then the path is typically omitted altogether. In the case of history or rename tracing  e.g. running a command like svn cat -r OLD foo.c on a file that was renamed long ago  the rename tracking will simply halt if one of the object's former names is determined to be read-restricted.

All of this path-checking can sometimes be quite expensive, especially in the case of svn log. When retrieving a list revisions, the server looks at every changed path in each revision and checks it for readability. If an unreadable path is discovered, then it's omitted from the list of the revision's changed paths (normally seen with the --verbose option), and the whole log message is suppressed. Needless to say, this can be time-consuming on revisions that affect a large number of files. This is the cost of security: even if you haven't configured a module like mod_authz_svn at all, the mod_dav_svn module is still asking Apache httpd to run authorization checks on every path. The mod_dav_svn module has no idea what authorization modules have been installed, so all it can do is ask Apache to invoke whatever might be present.

On the other hand, there's also an escape-hatch of sorts, one which allows you to trade security features for speed. If you're not enforcing any sort of per-directory authorization (i.e. not using mod_authz_svn or similar module), then you can disable all of this path-checking. In your httpd.conf file, use the SVNPathAuthz directive:

Example 6.4. Disabling path checks altogether

<Location /repos>
  DAV svn
  SVNParentPath /usr/local/svn
           
  SVNPathAuthz off
</Location>            
         

The SVNPathAuthz directive is "on" by default. When set "off", all path-based authorization checking is disabled; mod_dav_svn stops invoking authorization checks on every path it discovers.

-- snip

 

by: sants_ppPosted on 2009-09-18 at 14:27:19ID: 25370119

just tried with SVNPathAuthz off. but still no luck. commited two files and it opened lots of connections.

FYI : access.log

127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn HTTP/1.1" 207 637 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "MKACTIVITY /svn/!svn/act/753b392d-e1db-614e-a900-bc9005af9a3b HTTP/1.1" 201 348 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/!svn/vcc/default HTTP/1.1" 207 389 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser l [18/Sep/2009:17:07:09 -0400] "CHECKOUT /svn/!svn/bln/10 HTTP/1.1" 201 363 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPPATCH /svn/!svn/wbl/753b392d-e1db-614e-a900-bc9005af9a3b/10 HTTP/1.1" 207 456 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn HTTP/1.1" 207 374 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "CHECKOUT /svn/!svn/ver/10/ HTTP/1.1" 201 361 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/!svn/wrk/753b392d-e1db-614e-a900-bc9005af9a3b/New%20Text%20Document%20(6).txt HTTP/1.1" 404 397 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/New%20Text%20Document%20(6).txt HTTP/1.1" 404 351 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/!svn/wrk/753b392d-e1db-614e-a900-bc9005af9a3b/New%20Text%20Document%20(7).txt HTTP/1.1" 404 397 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/New%20Text%20Document%20(7).txt HTTP/1.1" 404 351 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/!svn/wrk/753b392d-e1db-614e-a900-bc9005af9a3b/New%20Text%20Document%20(8).txt HTTP/1.1" 404 397 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PROPFIND /svn/New%20Text%20Document%20(8).txt HTTP/1.1" 404 351 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PUT /svn/!svn/wrk/753b392d-e1db-614e-a900-bc9005af9a3b/New%20Text%20Document%20(6).txt HTTP/1.1" 201 374 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PUT /svn/!svn/wrk/753b392d-e1db-614e-a900-bc9005af9a3b/New%20Text%20Document%20(7).txt HTTP/1.1" 201 374 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "PUT /svn/!svn/wrk/753b392d-e1db-614e-a900-bc9005af9a3b/New%20Text%20Document%20(8).txt HTTP/1.1" 201 374 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:09 -0400] "MERGE /svn HTTP/1.1" 200 1559 "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
127.0.0.1 - testuser [18/Sep/2009:17:07:10 -0400] "DELETE /svn/!svn/act/753b392d-e1db-614e-a900-bc9005af9a3b HTTP/1.1" 204 - "-" "SVN/1.6.5 (r38866)/TortoiseSVN-1.6.5.16974 neon/0.28.6"
                                              
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by: ckhsu1977Posted on 2009-09-18 at 14:58:55ID: 25370342

Not sure what you mean by lots of connections. I see one connection from testuser. Your access.log looks fine for those 3 files (New Text Document(6|7|8).txt) you commited.

 

by: sants_ppPosted on 2009-09-18 at 16:06:50ID: 25370670

i mean lots of http connection. i have committed two files but seeing more than two test user entries in the log files. commiting two files logging multiple "test user" entries in the log file. each test user entries are http connections right?

 

by: ckhsu1977Posted on 2009-09-18 at 16:17:38ID: 25370707

access.log logs what httpd is doing. Entries in the log represent transactions requested to and from httpd. So multiple entries does not equal multiple connections.

 

by: sants_ppPosted on 2009-09-20 at 12:24:03ID: 25378581

Thanks..

20120131-EE-VQP-002

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