Patch config to make Sitecore append to the same log files over App Pool restarts. (Good for tailing the logs over site recycles).

z.Sitecore.Development.RollingLogger.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <log4net>
        <appender name="LogFileAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/log.txt</patch:attribute>
            </file>
        </appender>
        <appender name="WebDAVLogFileAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/WebDAV.log.txt</patch:attribute>
            </file>
        </appender>
        <appender name="PublishingLogFileAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/Publishing.log.txt</patch:attribute>
            </file>
        </appender>
        <appender name="SearchLogFileAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/Search.log.txt</patch:attribute>
            </file>
        </appender>
        <appender name="CrawlingLogFileAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/Crawling.log.txt</patch:attribute>
            </file>
        </appender>
        <appender name="ClientLogAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/Client.log.txt</patch:attribute>
            </file>
        </appender>
        <appender name="FxmLogFileAppender">
            <patch:attribute name="type">log4net.Appender.RollingFileAppender, Sitecore.Logging</patch:attribute>
            <file>
                <patch:attribute name="value">$(dataFolder)/logs/Fxm.log.txt</patch:attribute>
            </file>
        </appender>
      </log4net>
    </sitecore>
</configuration>