defaria.com/blogs/Status/2005/11/create-dev-snap.html

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  73                       <li class="asset-meta-list-item">Posted on <time datetime="2005-11-17T12:39:40-08:00" itemprop="datePublished">November 17, 2005</time></li>
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  84                   <ul>
  85   <li>Looked into create_dev_snapview.pl.</li>
  86
  87   <li>Tested speeds of FTP vs. SMB</li>
  88 </ul>
  89                   <h2>create_dev_snapview.pl</h2>
  90
  91 <blockquote type=cite>
  92 <b>From:</b> Andrew Feltham <br>
  93 <b>Sent:</b> Tuesday, November 15, 2005 3:58 PM<br>
  94 <b>To:</b> Shivdutt Jha<br>
  95 <b>Subject:</b> creating snapshot views <br>
  96 </font><br>
  97
  98 <p>Hi Shivdutt,</p>
  99
 100 <p>so I've tried to use Naga's tool for creating a snapshot view of a particular stream using a variety of  incremental baselines.</p>
 101
 102 <p>I've done this using a file generated by Phil's nightly builds (see attached) which lists the specific baseline which was current for each vob.</p>
 103
 104 <p>First of all, it does not seem to work (see image below). I'm not sure I'm handling the composite baseline label properly</p>
 105
 106 <p>Secondly, I do find the tool a bit awkward as it expects me to input several incremental baselines for vobs which are not included in my load rules.</p>
 107
 108 <p>It would be nice if I could specify the vobs on the cmd line, and only provide those labels.</p>
 109 </blockquote>
 110
 111 <p>Actually the script is working as designed. The arguments for create_dev_snapview.pl are:</p>
 112
 113 <div class="code"><pre>
 114 create_dev_snapview.pl &lt;project_name&gt; [ baseline_selector ]
 115 </pre></div>
 116
 117 <p>project_name is mandatory but baseline_selector is optional. If you don't specify the baseline_selector then it appears that the script takes all the recommended baselines for all components in the project. Or you can specify a list of baselines if you want different ones. The script checks the number of baselines you specified and compares them to the number of <i>modifiable</i> components in the project. These two numbers must agree.</p>
 118
 119 <p>After painstakingly typing in the command line (wish you would have posted the command line in text! :-( ) and running it through Perl's debugger I came to the realization that you typed in 11 (very long) baselines and there are only 10 modifiable components in the ldx_2.3 project.</p>
 120
 121 <p>In thinking of how to do this better I can think of two methods:</p>
 122
 123 <ul>
 124   <li>Assuming the <span>buildconfig</span>.txt file is a standard file and contains all the information needed, add a -f &lt;buildconfig&gt; option to create_dev_snapview.pl. When present the script would open and parse that file, extracting out the required information. This would help cut down on typing and errors.</li>
 125
 126   <li>Modify the script to present a series of dialog boxes prompting for the baseline to use for each component in the project. Note that in this instance this would mean a total of 10 dialog box prompts!</li>
 127 </ul>
 128
 129 <p>Either of these options can be added to the existing script via options that cause it to operate in a different way if present or to operate like it used to operate if those options are not present.</p>
 130
 131 <p>(Question: When you type "perl" at your command line, what Perl are you running? Because Perl isn't normally present on Windows. Normally people using Clearcase run ccperl...).</p>
 132
 133 <h2>FTP vs. SMB</h2>
 134
 135 <p>Well this runs contrary to my previous experience but it turns out that a regular file copy using SMB shares is faster than FTP. I tested copying the old 2.7 Gig CQProd2001A database to my desktop, once with FTP and once with SMB. SMB won! Which is surprising to me because last time I tested something like this FTP was up to 10 times faster:</p>
 136
 137 <div class="code"><pre>
 138 Local:time ftpget -u vobadm -p4sjadm p4test . "/dev/d/CQBackupsfromIrvine/0916/CQProd2001A_db_200509160213.BAK"
 139 CQProd2001A_db_200509160213.BAK           2.66 GB    60.35 kB/s
 140
 141 real               769m10.858s
 142 user               1m29.418s
 143 sys                4m36.387s
 144 </pre></div>
 145
 146 <p>Versus:</p>
 147
 148 <div class="code"><pre>
 149 Local:time cp //p4test/CQBackupsfromIrvine/0916/CQProd2001A_db_200509160213.BAK /tmp
 150
 151 real              532m7.457s
 152 user              0m16.714s
 153 sys               1m11.362s
 154 </pre></div>
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