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<H1>CUPS Software Performance Specification</H1></A><BR>
CUPS-SPS-1.2<BR>
Easy Software Products<BR>
Copyright 1997-2003, All Rights Reserved<BR>
</CENTER>
<HR>
<H1 ALIGN="CENTER"><A NAME="CONTENTS">Table of Contents</A></H1>
<BR>
<BR><B><A HREF="#1">1 Scope</A></B>
<UL>
<LI><A HREF="#1_1">1.1 Identification</A></LI>
<LI><A HREF="#1_2">1.2 System Overview</A></LI>
<LI><A HREF="#1_3">1.3 Document Overview</A></LI>
</UL>
<B><A HREF="#2">2 References</A></B>
<UL>
<LI><A HREF="#2_1">2.1 CUPS Documentation</A></LI>
<LI><A HREF="#2_2">2.2 Other Documents</A></LI>
</UL>
<B><A HREF="#3">3 Programs</A></B>
<BR>
<BR><B><A HREF="#4">4 Scheduler Objects</A></B>
<BR>
<BR><B><A HREF="#5">A Glossary</A></B>
<UL>
<LI><A HREF="#5_1">A.1 Terms</A></LI>
<LI><A HREF="#5_2">A.2 Acronyms</A></LI>
</UL>
<HR>
<H1><A NAME="1">1 Scope</A></H1>
<H2><A NAME="1_1">1.1 Identification</A></H2>
<P>This software performance specification provides an analysis of the
 memory, disk, and processor utilitization of each program in the Common
 UNIX Printing System (&quot;CUPS&quot;) Version 1.2.</P>
<P>For the purposes of comparison, all figures are for the Linux Intel
 platform. Memory utilization on other platforms should be similar.</P>
<H2><A NAME="1_2">1.2 System Overview</A></H2>
<P>CUPS provides a portable printing layer for UNIX&reg;-based operating
 systems. It has been developed by<A HREF="http://www.easysw.com"> Easy
 Software Products</A> to promote a standard printing solution for all
 UNIX vendors and users. CUPS provides the System V and Berkeley
 command-line interfaces.</P>
<P>CUPS uses the Internet Printing Protocol (&quot;IPP&quot;) as the basis for
 managing print jobs and queues. The Line Printer Daemon (&quot;LPD&quot;) Server
 Message Block (&quot;SMB&quot;), and AppSocket (a.k.a. JetDirect) protocols are
 also supported with reduced functionality. CUPS adds network printer
 browsing and PostScript Printer Description (&quot;PPD&quot;) based printing
 options to support real-world printing under UNIX.</P>
<P>CUPS also includes a customized version of GNU Ghostscript (currently
 based off GNU Ghostscript 5.50) and an image file RIP that are used to
 support non-PostScript printers. Sample drivers for HP and EPSON
 printers are included that use these filters.</P>
<H2><A NAME="1_3">1.3 Document Overview</A></H2>
<P>This software performance specification is organized into the
 following sections:</P>
<UL>
<LI>1 - Scope</LI>
<LI>2 - References</LI>
<LI>3 - Programs</LI>
<LI>4 - Scheduler Objects</LI>
<LI>A - Glossary</LI>
</UL>
<H1><A NAME="2">2 References</A></H1>
<H2><A NAME="2_1">2.1 CUPS Documentation</A></H2>
<P>The following CUPS documentation is referenced by this document:</P>
<UL>
<LI>CUPS-CMP-1.2: CUPS Configuration Management Plan</LI>
<LI>CUPS-IDD-1.2: CUPS System Interface Design Description</LI>
<LI>CUPS-IPP-1.2: CUPS Implementation of IPP</LI>
<LI>CUPS-SAM-1.2.x: CUPS Software Administrators Manual</LI>
<LI>CUPS-SDD-1.2: CUPS Software Design Description</LI>
<LI>CUPS-SPM-1.2.x: CUPS Software Programming Manual</LI>
<LI>CUPS-SSR-1.2: CUPS Software Security Report</LI>
<LI>CUPS-STP-1.2: CUPS Software Test Plan</LI>
<LI>CUPS-SUM-1.2.x: CUPS Software Users Manual</LI>
<LI>CUPS-SVD-1.2: CUPS Software Version Description</LI>
</UL>
<H2><A NAME="2_2">2.2 Other Documents</A></H2>
<P>The following non-CUPS documents are referenced by this document:</P>
<UL>
<LI><A HREF="http://partners.adobe.com/asn/developer/PDFS/TN/5003.PPD_Spec_v4.3.pdf">
Adobe PostScript Printer Description File Format Specification, Version
 4.3.</A></LI>
<LI><A HREF="http://partners.adobe.com/asn/developer/PDFS/TN/PLRM.pdf">
Adobe PostScript Language Reference, Third Edition.</A></LI>
<LI>IPP: Job and Printer Set Operations</LI>
<LI>IPP/1.1: Encoding and Transport</LI>
<LI>IPP/1.1: Implementers Guide</LI>
<LI>IPP/1.1: Model and Semantics</LI>
<LI><A HREF="http://www.ietf.org/rfc/rfc1179.txt">RFC 1179, Line Printer
 Daemon Protocol</A></LI>
<LI><A HREF="http://www.ietf.org/rfc/rfc2567.txt">RFC 2567, Design Goals
 for an Internet Printing Protocol</A></LI>
<LI><A HREF="http://www.ietf.org/rfc/rfc2568.txt">RFC 2568, Rationale
 for the Structure of the Model and Protocol for the Internet Printing
 Protocol</A></LI>
<LI><A HREF="http://www.ietf.org/rfc/rfc2569.txt">RFC 2569, Mapping
 between LPD and IPP Protocols</A></LI>
<LI><A HREF="http://www.ietf.org/rfc/rfc2616.txt">RFC 2616, Hypertext
 Transfer Protocol -- HTTP/1.1</A></LI>
<LI><A HREF="http://www.ietf.org/rfc/rfc2617.txt">RFC 2617, HTTP
 Authentication: Basic and Digest Access</A> Authentication</LI>
</UL>
<H1><A NAME="3">3 Programs</A></H1>
<P>The following table describes the average memory, disk, and CPU usage
 of each program in CUPS.</P>
<P>The base memory column shows the initial memory requirements for each
 program, including any shared libraries that are provided by CUPS.</P>
<P>The max memory column shows the maximum amount of memory that will be
 used by the program based upon the default configuration settings
 supplied with CUPS.</P>
<P>The temp files column indicates whether any temporary files are
 created.</P>
<P>The CPU usage column specifies a relative CPU usage by the program
 under normal conditions, either low, medium, or high. Low usage
 indicates that the program will never use more than 33% of the
 available CPU time. Medium usage indicates the program will use as much
 as 66% of the available CPU time. High usage indicates the program uses
 66% or more of the available CPU time.
<CENTER>
<TABLE BORDER="1" WIDTH="80%">
<TR><TH COLSPAN="3">Backends</TH></TR>
<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
 Files</TH><TH>CPU Usage</TH></TR>
<TR><TD>ipp</TD><TD>91k</TD><TD>256k</TD><TD>Up to size of print file</TD><TD>
Low</TD></TR>
<TR><TD>lpd</TD><TD>89k</TD><TD>89k</TD><TD>Up to size of print file</TD><TD>
Low</TD></TR>
<TR><TD>parallel</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print
 file</TD><TD>Low</TD></TR>
<TR><TD>serial</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print file</TD><TD>
Low</TD></TR>
<TR><TD>socket</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print file</TD><TD>
Low</TD></TR>
<TR><TD>usb</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print file</TD><TD>
Low</TD></TR>
<TR><TH COLSPAN="3">CGIs</TH></TR>
<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
 Files</TH><TH>CPU Usage</TH></TR>
<TR><TD>admin.cgi</TD><TD>107k</TD><TD>256k</TD><TD>Up to size of PPD
 file</TD><TD>Medium</TD></TR>
<TR><TD>classes.cgi</TD><TD>95k</TD><TD>Size of class objects</TD><TD>
None</TD><TD>Medium</TD></TR>
<TR><TD>jobs.cgi</TD><TD>93k</TD><TD>Size of job objects</TD><TD>None</TD><TD>
Medium</TD></TR>
<TR><TD>printers.cgi</TD><TD>95k</TD><TD>Size of printer objects</TD><TD>
None</TD><TD>Medium</TD></TR>
<TR><TH COLSPAN="3">Command-Line Programs</TH></TR>
<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
 Files</TH><TH>CPU Usage</TH></TR>
<TR><TD>accept</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>cancel</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>disable</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>enable</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lp</TD><TD>90k</TD><TD>256k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lpadmin</TD><TD>148k</TD><TD>256k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lpc</TD><TD>86k</TD><TD>Size of job and printer objects</TD><TD>
None</TD><TD>Medium</TD></TR>
<TR><TD>lpinfo</TD><TD>89k</TD><TD>Size of device and PPD objects</TD><TD>
None</TD><TD>Medium</TD></TR>
<TR><TD>lpmove</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lpoptions</TD><TD>89k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lppasswd</TD><TD>90k</TD><TD>90k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lpq</TD><TD>87k</TD><TD>Size of job objects</TD><TD>None</TD><TD>
Medium</TD></TR>
<TR><TD>lpr</TD><TD>87k</TD><TD>256k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lprm</TD><TD>84k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>lpstat</TD><TD>119k</TD><TD>Size of job, printer, and class
 objects</TD><TD>None</TD><TD>Medium</TD></TR>
<TR><TD>reject</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TH COLSPAN="3">Daemons</TH></TR>
<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
 Files</TH><TH>CPU Usage</TH></TR>
<TR><TD>cups-lpd</TD><TD>92k</TD><TD>256k</TD><TD>One file per control
 or data file from client</TD><TD>Low</TD></TR>
<TR><TD>cupsd</TD><TD>308k</TD><TD>See Scheduler Requirements</TD><TD>
See Scheduler Requirements</TD><TD>Medium</TD></TR>
<TR><TD>cups-polld</TD><TD>84k</TD><TD>Size of printer and class objects</TD><TD>
None</TD><TD>Low</TD></TR>
<TR><TH COLSPAN="3">Filters</TH></TR>
<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
 Files</TH><TH>CPU Usage</TH></TR>
<TR><TD>hpgltops</TD><TD>263k</TD><TD>320k</TD><TD>None</TD><TD>Medium</TD>
</TR>
<TR><TD>imagetops</TD><TD>628k</TD><TD>10M</TD><TD>Swap file for
 uncompressed image data</TD><TD>Medium</TD></TR>
<TR><TD>imagetoraster</TD><TD>652k</TD><TD>10M</TD><TD>Swap file for
 uncompressed image data</TD><TD>High</TD></TR>
<TR><TD>pstops</TD><TD>775k</TD><TD>840k</TD><TD>Up to size of print
 file</TD><TD>Medium</TD></TR>
<TR><TD>pstoraster</TD><TD>4M</TD><TD>14M</TD><TD>Swap file for command
 lists</TD><TD>High</TD></TR>
<TR><TD>rastertoepson</TD><TD>693k</TD><TD>1M</TD><TD>None</TD><TD>Low</TD>
</TR>
<TR><TD>rastertohp</TD><TD>690k</TD><TD>1M</TD><TD>None</TD><TD>Low</TD></TR>
<TR><TD>texttops</TD><TD>638k</TD><TD>4*cols*rows</TD><TD>None</TD><TD>
Low</TD></TR>
</TABLE>
</CENTER>
</P>
<H1><A NAME="4">4 Scheduler Objects</A></H1>
<P>The <CODE>cupsd</CODE> program is the CUPS scheduler process. It
 manages many interdependent server objects that are used to manage and
 print files to printers.</P>
<P>The following table provides the memory and disk cost associated with
 each server object.
<CENTER>
<TABLE BORDER="1" WIDTH="80%">
<TR><TH>Object</TH><TH>Memory Per</TH><TH>Disk Per</TH></TR>
<TR><TD>Browse ACL</TD><TD>1k</TD><TD>120</TD></TR>
<TR><TD>Browse Poll</TD><TD>24</TD><TD>80</TD></TR>
<TR><TD>Browse Relay</TD><TD>28</TD><TD>80</TD></TR>
<TR><TD>Certificate</TD><TD>76</TD><TD>32</TD></TR>
<TR><TD>Class</TD><TD>9k</TD><TD>200</TD></TR>
<TR><TD>Client</TD><TD>13k</TD><TD>-</TD></TR>
<TR><TD>Device</TD><TD>256</TD><TD>-</TD></TR>
<TR><TD>Job</TD><TD>2k</TD><TD>1k + size of document files</TD></TR>
<TR><TD>Location ACL</TD><TD>1k</TD><TD>120</TD></TR>
<TR><TD>MIME Filter</TD><TD>268</TD><TD>80</TD></TR>
<TR><TD>MIME Type</TD><TD>340</TD><TD>80</TD></TR>
<TR><TD>PPD</TD><TD>200</TD><TD>656</TD></TR>
<TR><TD>Printer</TD><TD>11k</TD><TD>32k</TD></TR>
</TABLE>
</CENTER>
</P>
<H1 TYPE="A" VALUE="1"><A NAME="5">A Glossary</A></H1>
<H2><A NAME="5_1">A.1 Terms</A></H2>
<DL>
<DT>C</DT>
<DD>A computer language.</DD>
<DT>parallel</DT>
<DD>Sending or receiving data more than 1 bit at a time.</DD>
<DT>pipe</DT>
<DD>A one-way communications channel between two programs.</DD>
<DT>serial</DT>
<DD>Sending or receiving data 1 bit at a time.</DD>
<DT>socket</DT>
<DD>A two-way network communications channel.</DD>
</DL>
<H2><A NAME="5_2">A.2 Acronyms</A></H2>
<DL>
<DT>ASCII</DT>
<DD>American Standard Code for Information Interchange</DD>
<DT>CUPS</DT>
<DD>Common UNIX Printing System</DD>
<DT>ESC/P</DT>
<DD>EPSON Standard Code for Printers</DD>
<DT>FTP</DT>
<DD>File Transfer Protocol</DD>
<DT>HP-GL</DT>
<DD>Hewlett-Packard Graphics Language</DD>
<DT>HP-PCL</DT>
<DD>Hewlett-Packard Page Control Language</DD>
<DT>HP-PJL</DT>
<DD>Hewlett-Packard Printer Job Language</DD>
<DT>IETF</DT>
<DD>Internet Engineering Task Force</DD>
<DT>IPP</DT>
<DD>Internet Printing Protocol</DD>
<DT>ISO</DT>
<DD>International Standards Organization</DD>
<DT>LPD</DT>
<DD>Line Printer Daemon</DD>
<DT>MIME</DT>
<DD>Multimedia Internet Mail Exchange</DD>
<DT>PPD</DT>
<DD>PostScript Printer Description</DD>
<DT>SMB</DT>
<DD>Server Message Block</DD>
<DT>TFTP</DT>
<DD>Trivial File Transfer Protocol</DD>
</DL>
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	23	<CENTER><A HREF="#CONTENTS"><IMG SRC="images/cups-large.gif" BORDER="0" WIDTH="431" HEIGHT="511"><BR>
	24	<H1>CUPS Software Performance Specification</H1></A><BR>
	25	CUPS-SPS-1.2<BR>
	26	Easy Software Products<BR>
	27	Copyright 1997-2003, All Rights Reserved<BR>
	28	</CENTER>
	29	<HR>
	30	<H1 ALIGN="CENTER"><A NAME="CONTENTS">Table of Contents</A></H1>
	31	<BR>
	32	<BR><B><A HREF="#1">1 Scope</A></B>
	33	<UL>
	34	<LI><A HREF="#1_1">1.1 Identification</A></LI>
	35	<LI><A HREF="#1_2">1.2 System Overview</A></LI>
	36	<LI><A HREF="#1_3">1.3 Document Overview</A></LI>
	37	</UL>
	38	<B><A HREF="#2">2 References</A></B>
	39	<UL>
	40	<LI><A HREF="#2_1">2.1 CUPS Documentation</A></LI>
	41	<LI><A HREF="#2_2">2.2 Other Documents</A></LI>
	42	</UL>
	43	<B><A HREF="#3">3 Programs</A></B>
	44	<BR>
	45	<BR><B><A HREF="#4">4 Scheduler Objects</A></B>
	46	<BR>
	47	<BR><B><A HREF="#5">A Glossary</A></B>
	48	<UL>
	49	<LI><A HREF="#5_1">A.1 Terms</A></LI>
	50	<LI><A HREF="#5_2">A.2 Acronyms</A></LI>
	51	</UL>
	52	<HR>
	53	<H1><A NAME="1">1 Scope</A></H1>
	54	<H2><A NAME="1_1">1.1 Identification</A></H2>
	55	<P>This software performance specification provides an analysis of the
	56	memory, disk, and processor utilitization of each program in the Common
	57	UNIX Printing System ("CUPS") Version 1.2.</P>
	58	<P>For the purposes of comparison, all figures are for the Linux Intel
	59	platform. Memory utilization on other platforms should be similar.</P>
	60	<H2><A NAME="1_2">1.2 System Overview</A></H2>
	61	<P>CUPS provides a portable printing layer for UNIX®-based operating
	62	systems. It has been developed by<A HREF="http://www.easysw.com"> Easy
	63	Software Products</A> to promote a standard printing solution for all
	64	UNIX vendors and users. CUPS provides the System V and Berkeley
65	command-line interfaces.</P>
66	<P>CUPS uses the Internet Printing Protocol ("IPP") as the basis for
67	managing print jobs and queues. The Line Printer Daemon ("LPD") Server
68	Message Block ("SMB"), and AppSocket (a.k.a. JetDirect) protocols are
69	also supported with reduced functionality. CUPS adds network printer
70	browsing and PostScript Printer Description ("PPD") based printing
71	options to support real-world printing under UNIX.</P>
72	<P>CUPS also includes a customized version of GNU Ghostscript (currently
73	based off GNU Ghostscript 5.50) and an image file RIP that are used to
74	support non-PostScript printers. Sample drivers for HP and EPSON
75	printers are included that use these filters.</P>
76	<H2><A NAME="1_3">1.3 Document Overview</A></H2>
77	<P>This software performance specification is organized into the
78	following sections:</P>
79	<UL>
80	<LI>1 - Scope</LI>
81	<LI>2 - References</LI>
82	<LI>3 - Programs</LI>
83	<LI>4 - Scheduler Objects</LI>
84	<LI>A - Glossary</LI>
85	</UL>
86	<H1><A NAME="2">2 References</A></H1>
87	<H2><A NAME="2_1">2.1 CUPS Documentation</A></H2>
88	<P>The following CUPS documentation is referenced by this document:</P>
89	<UL>
90	<LI>CUPS-CMP-1.2: CUPS Configuration Management Plan</LI>
91	<LI>CUPS-IDD-1.2: CUPS System Interface Design Description</LI>
92	<LI>CUPS-IPP-1.2: CUPS Implementation of IPP</LI>
93	<LI>CUPS-SAM-1.2.x: CUPS Software Administrators Manual</LI>
94	<LI>CUPS-SDD-1.2: CUPS Software Design Description</LI>
95	<LI>CUPS-SPM-1.2.x: CUPS Software Programming Manual</LI>
96	<LI>CUPS-SSR-1.2: CUPS Software Security Report</LI>
97	<LI>CUPS-STP-1.2: CUPS Software Test Plan</LI>
98	<LI>CUPS-SUM-1.2.x: CUPS Software Users Manual</LI>
99	<LI>CUPS-SVD-1.2: CUPS Software Version Description</LI>
100	</UL>
101	<H2><A NAME="2_2">2.2 Other Documents</A></H2>
102	<P>The following non-CUPS documents are referenced by this document:</P>
103	<UL>
104	<LI><A HREF="http://partners.adobe.com/asn/developer/PDFS/TN/5003.PPD_Spec_v4.3.pdf">
105	Adobe PostScript Printer Description File Format Specification, Version
106	4.3.</A></LI>
107	<LI><A HREF="http://partners.adobe.com/asn/developer/PDFS/TN/PLRM.pdf">
108	Adobe PostScript Language Reference, Third Edition.</A></LI>
109	<LI>IPP: Job and Printer Set Operations</LI>
110	<LI>IPP/1.1: Encoding and Transport</LI>
111	<LI>IPP/1.1: Implementers Guide</LI>
112	<LI>IPP/1.1: Model and Semantics</LI>
113	<LI><A HREF="http://www.ietf.org/rfc/rfc1179.txt">RFC 1179, Line Printer
114	Daemon Protocol</A></LI>
115	<LI><A HREF="http://www.ietf.org/rfc/rfc2567.txt">RFC 2567, Design Goals
116	for an Internet Printing Protocol</A></LI>
117	<LI><A HREF="http://www.ietf.org/rfc/rfc2568.txt">RFC 2568, Rationale
118	for the Structure of the Model and Protocol for the Internet Printing
119	Protocol</A></LI>
120	<LI><A HREF="http://www.ietf.org/rfc/rfc2569.txt">RFC 2569, Mapping
121	between LPD and IPP Protocols</A></LI>
122	<LI><A HREF="http://www.ietf.org/rfc/rfc2616.txt">RFC 2616, Hypertext
123	Transfer Protocol -- HTTP/1.1</A></LI>
124	<LI><A HREF="http://www.ietf.org/rfc/rfc2617.txt">RFC 2617, HTTP
125	Authentication: Basic and Digest Access</A> Authentication</LI>
126	</UL>
127	<H1><A NAME="3">3 Programs</A></H1>
128	<P>The following table describes the average memory, disk, and CPU usage
129	of each program in CUPS.</P>
130	<P>The base memory column shows the initial memory requirements for each
131	program, including any shared libraries that are provided by CUPS.</P>
132	<P>The max memory column shows the maximum amount of memory that will be
133	used by the program based upon the default configuration settings
134	supplied with CUPS.</P>
135	<P>The temp files column indicates whether any temporary files are
136	created.</P>
137	<P>The CPU usage column specifies a relative CPU usage by the program
138	under normal conditions, either low, medium, or high. Low usage
139	indicates that the program will never use more than 33% of the
140	available CPU time. Medium usage indicates the program will use as much
141	as 66% of the available CPU time. High usage indicates the program uses
142	66% or more of the available CPU time.
143	<CENTER>
144	<TABLE BORDER="1" WIDTH="80%">
145	<TR><TH COLSPAN="3">Backends</TH></TR>
146	<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
147	Files</TH><TH>CPU Usage</TH></TR>
148	<TR><TD>ipp</TD><TD>91k</TD><TD>256k</TD><TD>Up to size of print file</TD><TD>
149	Low</TD></TR>
150	<TR><TD>lpd</TD><TD>89k</TD><TD>89k</TD><TD>Up to size of print file</TD><TD>
151	Low</TD></TR>
152	<TR><TD>parallel</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print
153	file</TD><TD>Low</TD></TR>
154	<TR><TD>serial</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print file</TD><TD>
155	Low</TD></TR>
156	<TR><TD>socket</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print file</TD><TD>
157	Low</TD></TR>
158	<TR><TD>usb</TD><TD>85k</TD><TD>85k</TD><TD>Up to size of print file</TD><TD>
159	Low</TD></TR>
160	<TR><TH COLSPAN="3">CGIs</TH></TR>
161	<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
162	Files</TH><TH>CPU Usage</TH></TR>
163	<TR><TD>admin.cgi</TD><TD>107k</TD><TD>256k</TD><TD>Up to size of PPD
164	file</TD><TD>Medium</TD></TR>
165	<TR><TD>classes.cgi</TD><TD>95k</TD><TD>Size of class objects</TD><TD>
166	None</TD><TD>Medium</TD></TR>
167	<TR><TD>jobs.cgi</TD><TD>93k</TD><TD>Size of job objects</TD><TD>None</TD><TD>
168	Medium</TD></TR>
169	<TR><TD>printers.cgi</TD><TD>95k</TD><TD>Size of printer objects</TD><TD>
170	None</TD><TD>Medium</TD></TR>
171	<TR><TH COLSPAN="3">Command-Line Programs</TH></TR>
172	<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
173	Files</TH><TH>CPU Usage</TH></TR>
174	<TR><TD>accept</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
175	<TR><TD>cancel</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
176	<TR><TD>disable</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
177	<TR><TD>enable</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
178	<TR><TD>lp</TD><TD>90k</TD><TD>256k</TD><TD>None</TD><TD>Low</TD></TR>
179	<TR><TD>lpadmin</TD><TD>148k</TD><TD>256k</TD><TD>None</TD><TD>Low</TD></TR>
180	<TR><TD>lpc</TD><TD>86k</TD><TD>Size of job and printer objects</TD><TD>
181	None</TD><TD>Medium</TD></TR>
182	<TR><TD>lpinfo</TD><TD>89k</TD><TD>Size of device and PPD objects</TD><TD>
183	None</TD><TD>Medium</TD></TR>
184	<TR><TD>lpmove</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
185	<TR><TD>lpoptions</TD><TD>89k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
186	<TR><TD>lppasswd</TD><TD>90k</TD><TD>90k</TD><TD>None</TD><TD>Low</TD></TR>
187	<TR><TD>lpq</TD><TD>87k</TD><TD>Size of job objects</TD><TD>None</TD><TD>
188	Medium</TD></TR>
189	<TR><TD>lpr</TD><TD>87k</TD><TD>256k</TD><TD>None</TD><TD>Low</TD></TR>
190	<TR><TD>lprm</TD><TD>84k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
191	<TR><TD>lpstat</TD><TD>119k</TD><TD>Size of job, printer, and class
192	objects</TD><TD>None</TD><TD>Medium</TD></TR>
193	<TR><TD>reject</TD><TD>88k</TD><TD>128k</TD><TD>None</TD><TD>Low</TD></TR>
194	<TR><TH COLSPAN="3">Daemons</TH></TR>
195	<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
196	Files</TH><TH>CPU Usage</TH></TR>
197	<TR><TD>cups-lpd</TD><TD>92k</TD><TD>256k</TD><TD>One file per control
198	or data file from client</TD><TD>Low</TD></TR>
199	<TR><TD>cupsd</TD><TD>308k</TD><TD>See Scheduler Requirements</TD><TD>
200	See Scheduler Requirements</TD><TD>Medium</TD></TR>
201	<TR><TD>cups-polld</TD><TD>84k</TD><TD>Size of printer and class objects</TD><TD>
202	None</TD><TD>Low</TD></TR>
203	<TR><TH COLSPAN="3">Filters</TH></TR>
204	<TR><TH>Program</TH><TH>Base Memory</TH><TH>Max Memory</TH><TH>Temp
205	Files</TH><TH>CPU Usage</TH></TR>
206	<TR><TD>hpgltops</TD><TD>263k</TD><TD>320k</TD><TD>None</TD><TD>Medium</TD>
207	</TR>
208	<TR><TD>imagetops</TD><TD>628k</TD><TD>10M</TD><TD>Swap file for
209	uncompressed image data</TD><TD>Medium</TD></TR>
210	<TR><TD>imagetoraster</TD><TD>652k</TD><TD>10M</TD><TD>Swap file for
211	uncompressed image data</TD><TD>High</TD></TR>
212	<TR><TD>pstops</TD><TD>775k</TD><TD>840k</TD><TD>Up to size of print
213	file</TD><TD>Medium</TD></TR>
214	<TR><TD>pstoraster</TD><TD>4M</TD><TD>14M</TD><TD>Swap file for command
215	lists</TD><TD>High</TD></TR>
216	<TR><TD>rastertoepson</TD><TD>693k</TD><TD>1M</TD><TD>None</TD><TD>Low</TD>
217	</TR>
218	<TR><TD>rastertohp</TD><TD>690k</TD><TD>1M</TD><TD>None</TD><TD>Low</TD></TR>
219	<TR><TD>texttops</TD><TD>638k</TD><TD>4colsrows</TD><TD>None</TD><TD>
220	Low</TD></TR>
221	</TABLE>
222	</CENTER>
223	</P>
224	<H1><A NAME="4">4 Scheduler Objects</A></H1>
225	<P>The <CODE>cupsd</CODE> program is the CUPS scheduler process. It
226	manages many interdependent server objects that are used to manage and
227	print files to printers.</P>
228	<P>The following table provides the memory and disk cost associated with
229	each server object.
230	<CENTER>
231	<TABLE BORDER="1" WIDTH="80%">
232	<TR><TH>Object</TH><TH>Memory Per</TH><TH>Disk Per</TH></TR>
233	<TR><TD>Browse ACL</TD><TD>1k</TD><TD>120</TD></TR>
234	<TR><TD>Browse Poll</TD><TD>24</TD><TD>80</TD></TR>
235	<TR><TD>Browse Relay</TD><TD>28</TD><TD>80</TD></TR>
236	<TR><TD>Certificate</TD><TD>76</TD><TD>32</TD></TR>
237	<TR><TD>Class</TD><TD>9k</TD><TD>200</TD></TR>
238	<TR><TD>Client</TD><TD>13k</TD><TD>-</TD></TR>
239	<TR><TD>Device</TD><TD>256</TD><TD>-</TD></TR>
240	<TR><TD>Job</TD><TD>2k</TD><TD>1k + size of document files</TD></TR>
241	<TR><TD>Location ACL</TD><TD>1k</TD><TD>120</TD></TR>
242	<TR><TD>MIME Filter</TD><TD>268</TD><TD>80</TD></TR>
243	<TR><TD>MIME Type</TD><TD>340</TD><TD>80</TD></TR>
244	<TR><TD>PPD</TD><TD>200</TD><TD>656</TD></TR>
245	<TR><TD>Printer</TD><TD>11k</TD><TD>32k</TD></TR>
246	</TABLE>
247	</CENTER>
248	</P>
249	<H1 TYPE="A" VALUE="1"><A NAME="5">A Glossary</A></H1>
250	<H2><A NAME="5_1">A.1 Terms</A></H2>
251	<DL>
252	<DT>C</DT>
253	<DD>A computer language.</DD>
254	<DT>parallel</DT>
255	<DD>Sending or receiving data more than 1 bit at a time.</DD>
256	<DT>pipe</DT>
257	<DD>A one-way communications channel between two programs.</DD>
258	<DT>serial</DT>
259	<DD>Sending or receiving data 1 bit at a time.</DD>
260	<DT>socket</DT>
261	<DD>A two-way network communications channel.</DD>
262	</DL>
263	<H2><A NAME="5_2">A.2 Acronyms</A></H2>
264	<DL>
265	<DT>ASCII</DT>
266	<DD>American Standard Code for Information Interchange</DD>
267	<DT>CUPS</DT>
268	<DD>Common UNIX Printing System</DD>
269	<DT>ESC/P</DT>
270	<DD>EPSON Standard Code for Printers</DD>
271	<DT>FTP</DT>
272	<DD>File Transfer Protocol</DD>
273	<DT>HP-GL</DT>
274	<DD>Hewlett-Packard Graphics Language</DD>
275	<DT>HP-PCL</DT>
276	<DD>Hewlett-Packard Page Control Language</DD>
277	<DT>HP-PJL</DT>
278	<DD>Hewlett-Packard Printer Job Language</DD>
279	<DT>IETF</DT>
280	<DD>Internet Engineering Task Force</DD>
281	<DT>IPP</DT>
282	<DD>Internet Printing Protocol</DD>
283	<DT>ISO</DT>
284	<DD>International Standards Organization</DD>
285	<DT>LPD</DT>
286	<DD>Line Printer Daemon</DD>
287	<DT>MIME</DT>
288	<DD>Multimedia Internet Mail Exchange</DD>
289	<DT>PPD</DT>
290	<DD>PostScript Printer Description</DD>
291	<DT>SMB</DT>
292	<DD>Server Message Block</DD>
293	<DT>TFTP</DT>
294	<DD>Trivial File Transfer Protocol</DD>
295	</DL>
296	</BODY>
297	</HTML>