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56 lines
2.6 KiB
56 lines
2.6 KiB
<HTML>
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<!-- SECTION: Getting Started -->
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<HEAD>
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<TITLE>Printer Accounting Basics</TITLE>
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<LINK REL="STYLESHEET" TYPE="text/css" HREF="../cups-printable.css">
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</HEAD>
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<BODY>
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<H1 CLASS="title">Printer Accounting Basics</H1>
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<P>CUPS supports a variety of printer accounting schemes. Aside from the
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built-in <A HREF="#QUOTAS">quota</A> and <A HREF="#PAGELOG">page logging</A>
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support, there are several third-party solutions that can be found online.</P>
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<H2 CLASS="title"><A NAME="QUOTAS">Quota Support</A></H2>
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<P>CUPS supports page and size-based quotas for each printer.
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The quotas are tracked individually for each user, but a single set of
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limits applies to all users for a particular printer. For example, you
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can limit every user to 5 pages per day on an expensive printer, but
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you cannot limit every user except Johnny.</P>
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<P>The <CODE>job-k-limit</CODE>, <CODE>job-page-limit</CODE>, and <CODE>job-quota-period</CODE>
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options determine whether and how quotas are enforced for a printer.
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The <CODE>job-quota-period</CODE> option determines the time interval for
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quota tracking. The interval is expressed in seconds, so a day is
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86,400, a week is 604,800, and a month is 2,592,000 seconds. The
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<CODE>job-k-limit</CODE> option specifies the job size limit in kilobytes. The
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<CODE>job-page-limit</CODE> option specifies the number of pages limit.</P>
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<P>For quotas to be enforced, the period and at least one of the limits
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must be set to a non-zero value. The following options will enable
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weekly quotas with the given size and page count limits:</P>
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<PRE CLASS="command">
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<KBD>/usr/sbin/lpadmin -p <I>printer</I> -o job-quota-period=604800 \
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-o job-k-limit=1024 ENTER</KBD>
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<KBD>/usr/sbin/lpadmin -p <I>printer</I> -o job-quota-period=604800 \
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-o job-page-limit=100 ENTER</KBD>
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</PRE>
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<P>Or, you can combine all three options on the same line.</P>
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<P>While there is no way to query the current quota state for a particular
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user, any application can request a list of jobs for a user and printer that
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can be used to easily determine that information.</P>
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<H2 CLASS="title"><A NAME="PAGELOG">Page Logging</A></H2>
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<P>CUPS can log every page that is printed on a system to the <VAR><A HREF="man-cupsd-logs.html">page_log</A></VAR> file. Page logging must be enabled by setting the <CODE>PageLogFormat</CODE> directive in the <VAR><A HREF="man-cupsd.conf.html">cupsd.conf</A></VAR> file and is only available for drivers that provide page accounting information, typically all PostScript and CUPS raster devices. Raw queues and queues using third-party solutions such as Foomatic generally do not have useful page accounting information available.</P>
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</BODY>
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</HTML>
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