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From "Grierson, David" <David.Grier...@bskyb.com>
Subject RE: Subversion Windows Performance compared to Linux
Date Tue, 22 Apr 2014 13:30:51 GMT
Also for consideration in any comparison like this is whether or not a virus scanner is getting
in the way at all.

Obviously on Linux this isn't going to be happening but most Windows builds will have a virus
scanner of some sort.

Dg.
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From: Florian Ludwig [mailto:vierzigundzwei@gmail.com]
Sent: 22 April 2014 13:55
To: Johan Corveleyn
Cc: users@subversion.apache.org
Subject: Re: Subversion Windows Performance compared to Linux


From your numbers I deduce that the performance degradation can be
attributed partly to NTFS vs. ext4, and partly to Windows7 vs. Linux:
* NTFS vs. ext4: roughly a factor 3 slower.
* Windows 7 vs. Linux: roughly a factor 2.5 slower.

You assume that the file operation performance of Windows on NTFS and Linux on NTFS is the
same - which I am sure it is not.  First of all the NTFS driver on Linux is FUSE-based so
it runs in userspace and therefor slower than kernel based drivers such as ext4.  Also ext4
is one of the most used file system on Linux so I expect its code to be much more optimized.


Another interesting data point might be: what does the client-side
option exclusive-locking [1] (available as of 1.8) do to the test
results? Can you give that a try? Just adding "--config-option
config:working-copy:exclusive-locking=true" to your command line
invocations should do the trick.

I tried that, it bring down the checkout times (better result of two runs):

 * Linux ext4: 1m 15s
 * Linux NTFS: 3m  2s
 * Windows NTW: 6m 52s

So there is no noteworthy change on Linux but Windows performance improved by 25% (9m 19s
down to 6m 52s). It is still slow and further improvements would be welcome.

Also: it would be good to know the exact versions of sqlite and other
libraries that your svn (client) versions were built with. As of 1.8,
this information is provided by 'svn --version --verbose'.

 Linux:

svn, version 1.8.8 (r1568071)

   compiled Feb 28 2014, 19:40:43 on x86_64-redhat-linux-gnu



Copyright (C) 2013 The Apache Software Foundation.

This software consists of contributions made by many people;

see the NOTICE file for more information.

Subversion is open source software, see http://subversion.apache.org/



The following repository access (RA) modules are available:



* ra_svn : Module for accessing a repository using the svn network protocol.

  - with Cyrus SASL authentication

  - handles 'svn' scheme

* ra_local : Module for accessing a repository on local disk.

  - handles 'file' scheme

* ra_serf : Module for accessing a repository via WebDAV protocol using serf.

  - using serf 1.3.4

  - handles 'http' scheme

  - handles 'https' scheme



System information:



* running on x86_64-unknown-linux-gnu

  - Fedora release 20 (Heisenbug) (Heisenbug) [Linux 3.13.8-200.fc20.x86_64]

* linked dependencies:

  - APR 1.5.0 (compiled with 1.5.0)

  - APR-Util 1.5.3 (compiled with 1.5.3)

  - SQLite 3.8.4.2 (compiled with 3.8.3)

Windows:



svn, version 1.8.8 (r1568071)

   compiled Apr 12 2014, 14:17:25 on x86-microsoft-windows



Copyright (C) 2013 The Apache Software Foundation.

This software consists of contributions made by many people;

see the NOTICE file for more information.

Subversion is open source software, see http://subversion.apache.org/



The following repository access (RA) modules are available:



* ra_svn : Module for accessing a repository using the svn network protocol.

  - with Cyrus SASL authentication

  - handles 'svn' scheme

* ra_local : Module for accessing a repository on local disk.

  - handles 'file' scheme

* ra_serf : Module for accessing a repository via WebDAV protocol using serf.

  - using serf 1.3.4

  - handles 'http' scheme

  - handles 'https' scheme



System information:



* running on x86_64-microsoft-windows6.1.7601

  - Windows 7 Ultimate N, Service Pack 1, build 7601 [6.1 Client Multiprocessor Free]

* linked dependencies:

  - APR 1.5.0 (compiled with 1.5.0)

  - APR-Util 1.5.3 (compiled with 1.5.3)

  - SQLite 3.8.3.1 (compiled with 3.8.3.1)

* loaded shared libraries:

  - C:\Program Files\TortoiseSVN\bin\svn.exe   (1.8.8.60743)

  - C:\Windows\SYSTEM32\ntdll.dll   (6.1.7601.18247)

  - C:\Windows\system32\kernel32.dll   (6.1.7601.18409)

  - C:\Windows\system32\KERNELBASE.dll   (6.1.7601.18229)

  - C:\Program Files\TortoiseSVN\bin\libsvn_tsvn.dll   (1.8.8.60743)

  - C:\Program Files\TortoiseSVN\bin\libapr_tsvn.dll   (1.5)

  - C:\Windows\system32\WS2_32.dll   (6.1.7601.17514)

  - C:\Windows\system32\msvcrt.dll   (7.0.7601.17744)

  - C:\Windows\system32\RPCRT4.dll   (6.1.7601.18205)

  - C:\Windows\system32\NSI.dll   (6.1.7600.16385)

  - C:\Windows\system32\MSWSOCK.dll   (6.1.7601.18254)

  - C:\Windows\system32\user32.dll   (6.1.7601.17514)

  - C:\Windows\system32\GDI32.dll   (6.1.7601.18275)

  - C:\Windows\system32\LPK.dll   (6.1.7601.18177)

  - C:\Windows\system32\USP10.dll   (1.626.7601.18009)

  - C:\Windows\system32\ADVAPI32.dll   (6.1.7601.18247)

  - C:\Windows\SYSTEM32\sechost.dll   (6.1.7600.16385)

  - C:\Windows\system32\SHELL32.dll   (6.1.7601.18222)

  - C:\Windows\system32\SHLWAPI.dll   (6.1.7601.17514)

  - C:\Windows\system32\MSVCR110.dll   (11.0.51106.1)

  - C:\Program Files\TortoiseSVN\bin\libaprutil_tsvn.dll   (1.5.3)

  - C:\Windows\system32\WLDAP32.dll   (6.1.7601.17514)

  - C:\Program Files\TortoiseSVN\bin\intl3_tsvn.dll   (0.14.6)

  - C:\Program Files\TortoiseSVN\bin\libsasl.dll   (2.1.24)

  - C:\Windows\system32\ole32.dll   (6.1.7601.17514)

  - C:\Windows\system32\Secur32.dll   (6.1.7601.18270)

  - C:\Windows\system32\SSPICLI.DLL   (6.1.7601.18270)

  - C:\Windows\system32\CRYPT32.dll   (6.1.7601.18277)

  - C:\Windows\system32\MSASN1.dll   (6.1.7601.17514)

  - C:\Windows\system32\VERSION.dll   (6.1.7600.16385)

  - C:\Windows\system32\IMM32.DLL   (6.1.7600.16385)

  - C:\Windows\system32\MSCTF.dll   (6.1.7600.16385)

  - C:\Windows\system32\profapi.dll   (6.1.7600.16385)

  - C:\Program Files\TortoiseSVN\bin\saslANONYMOUS.dll   (2.1.24)

  - C:\Program Files\TortoiseSVN\bin\saslCRAMMD5.dll   (2.1.24)

  - C:\Program Files\TortoiseSVN\bin\saslDIGESTMD5.dll   (2.1.24)

  - C:\Program Files\TortoiseSVN\bin\saslGSSAPI.dll   (2.1.24)

  - C:\Program Files\TortoiseSVN\bin\saslLOGIN.dll   (2.1.24)

  - C:\Program Files\TortoiseSVN\bin\saslNTLM.dll   (2.1.24)

  - C:\Program Files\TortoiseSVN\bin\saslPLAIN.dll   (2.1.24)

  - C:\Windows\system32\Msimg32.DLL   (6.1.7600.16385)

  - C:\Windows\system32\api-ms-win-downlevel-advapi32-l1-1-0.dll   (6.2.9200.16492)

  - C:\Windows\system32\psapi.dll   (6.1.7600.16385)

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