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    <p>The rule of thumb is simple:<br> The less branch, the better.</p> <p>I mean, if you ever done deliver and rebase before with ClearCase, you know:</p> <ul> <li>how painful it is</li> <li>how poorly it scales with the number of file (merging 1000 files is awfully long, merging 5000 files is murder)</li> </ul> <p>So the real rule of thumb is:</p> <p><strong>if you don't have to modify any file for a given development stage, don't create a branch</strong>.</p> <p>For instance, for promoting a code to QA, where you will only read it (and launch some tests, in order to accept that code if they pass, or to reject that code if they fail), <strong>don't create a QA Stream where you would deliver the code</strong>: it is too long for an non-existent added value.</p> <p>Use <strong><a href="http://publib.boulder.ibm.com/infocenter/cchelp/v7r0m0/index.jsp?topic=/com.ibm.rational.clearcase.cc_proj.doc/t_chng_bl_prom_lvl.htm" rel="nofollow noreferrer">baseline promotion level</a></strong> whenever you can, and <a href="http://publib.boulder.ibm.com/infocenter/cchelp/v7r0m0/index.jsp?topic=/com.ibm.rational.clearcase.cc_proj.doc/c_ucm_ovvw_recommend_bl.htm" rel="nofollow noreferrer">recommend your promoted baselines</a>.</p> <p><img src="https://i.stack.imgur.com/XpUMk.gif" alt="promoted baselines"></p> <blockquote> <p>The Deployment Engineer will always use a dedicated stream for each environment to get his/her files required to carry out the build/deployment activities. </p> </blockquote> <p>Err... no, if you don't have any change to do.<br> The Deployment Engineer doesn't care at all where the baseline is coming from, only if the code deploys and runs successfully. </p>
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