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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<META http-equiv="Content-Type" content="text/html; charset=Windows-1252">
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<TITLE>Add to Archive Dialog Box</TITLE>
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<LINK href="style.css" rel="stylesheet" type="text/css">
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<H1>Add to Archive Dialog Box</H1>
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<P>Allows you to specify options for creating or updating an archive.</P>
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<H4>How to call this dialog box</H4>
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<LI>In Windows Explorer or in 7-Zip, right-click the file(s) or folder(s) you want to compress.</LI>
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<LI>Point to <B>7-Zip</B>, and then click the <B>Add to archive...</B> command item.</LI>
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<DD>Provides a space for you to specify a destination archive name.
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You can click "<B>...</B>" button to display "Open" dialog box
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that you can use to locate archive.</DD>
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<DT>Archive format</DT>
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<DD>Specifies a format of created archive. Some formats (gzip and bzip2)
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do not support compressing more the one file per archive.</DD>
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<DT>Compression level</DT>
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<P>Specifies compression level. There are 6 levels of compression:</P>
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<TR> <TH>Value</TH> <TH>Meaning</TH> </TR>
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<TR> <TD>Store</TD> <TD>Files will be copied to archive without compression.</TD> </TR>
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<TR> <TD>Fastest</TD> <TD>Fastest compression.</TD> </TR>
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<TR> <TD>Fast</TD> <TD>Fast compression.</TD> </TR>
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<TR> <TD>Normal</TD> <TD>Compression with balanced settings.</TD> </TR>
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<TR> <TD>Maximum</TD> <TD>Can give a higher compression ratio than Normal level.
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But it can be slower, and it can require more memory.</TD> </TR>
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<TR> <TD>Ultra</TD> <TD>Can give a higher compression ratio than Maximum level.
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But it can be slower, and it can require more memory.</TD> </TR>
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<DT>Compression method</DT>
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<P>Specifies compression method. Each archive format can have its own compression methods:</P>
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<TR> <TH>Method</TH> <TH>Description</TH> </TR>
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<TR> <TD>LZMA</TD> <TD>Default compression method of 7z format. It provides high
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compression ratio and very fast decompression.</TD> </TR>
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<TR> <TD>PPMd</TD> <TD>Dmitry Shkarin's PPMdH algorithm with small changes.
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Usually it provides high compression ratio and high speed
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for text files.</TD> </TR>
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<TR> <TD>BZip2</TD> <TD>Standard compression method based on BWT algorithm.
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Usually it provides high speed and pretty good
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compression ratio for text files.</TD> </TR>
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<TR> <TD>Deflate</TD> <TD>Standard compression method of ZIP and GZip formats.
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Compression ratio is not too high. But it provides pretty fast
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compressing and decompressing. Deflate method supports only
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32 KB dictionary.</TD> </TR>
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<TR> <TD>Deflate64</TD> <TD>Modified version of Deflate algorithm with
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bigger dictionary (64KB).</TD> </TR>
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<P>Estimated 7-Zip performance and memory requirements for AMD Athlon 64 X2 3800+:</P>
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<TH class="cc">Method</TH>
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<TH class="cc">Level</TH>
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<TH class="cc">Dictionary Size</TH>
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<TH class="cc">Compressing Speed</TH>
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<TH class="cc">Decompressing Speed</TH>
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<TH class="cc">Memory for Compressing</TH>
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<TH class="cc">Memory for Decompressing</TH>
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<TD class="cc" rowspan="5">LZMA</TD>
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<TD class="cc">fastest</TD>
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<TD class="cc">64 KB</TD>
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<TD class="cc">4.5 MB/s</TD>
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<TD class="cc" rowspan="5">15 MB/s</TD>
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<TD class="cc">3 MB</TD>
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<TD class="cc">3 MB</TD></TR>
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<TD class="cc">fast</TD>
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<TD class="cc">1 MB</TD>
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<TD class="cc">3 MB/s</TD>
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<TD class="cc">10 MB</TD>
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<TD class="cc">3 MB</TD></TR>
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<TD class="cc">normal</TD>
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<TD class="cc">16 MB</TD>
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<TD class="cc">2 MB/s</TD>
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<TD class="cc">186 MB</TD>
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<TD class="cc">18 MB</TD></TR>
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<TD class="cc">maximum</TD>
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<TD class="cc">32 MB</TD>
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<TD class="cc">1.8 MB/s</TD>
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<TD class="cc">376 MB</TD>
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<TD class="cc">34 MB</TD></TR>
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<TD class="cc">ultra</TD>
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<TD class="cc">64 MB</TD>
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<TD class="cc">1.6 MB/s</TD>
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<TD class="cc">709 MB</TD>
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<TD class="cc">66 MB</TD></TR>
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<TD class="cc" rowspan="4">PPMD</TD>
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<TD class="cc">fast</TD>
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<TD class="cc">4 MB</TD>
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<TD class="cc" colspan="2">1.4 MB/s</TD>
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<TD class="cc" colspan="2">6 MB</TD></TR>
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<TD class="cc">normal</TD>
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<TD class="cc">24MB</TD>
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<TD class="cc" colspan="2">1.2 MB/s</TD>
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<TD class="cc" colspan="2">26 MB</TD></TR>
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<TD class="cc">maximum</TD>
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<TD class="cc">64 MB</TD>
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<TD class="cc" colspan="2">1.0 MB/s</TD>
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<TD class="cc" colspan="2">66 MB</TD></TR>
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<TD class="cc">ultra</TD>
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<TD class="cc">192 MB</TD>
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<TD class="cc" colspan="2">0.9 MB/s</TD>
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<TD class="cc" colspan="2">194 MB</TD></TR>
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<TD class="cc" rowspan="4">Deflate</TD>
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<TD class="cc">fast</TD>
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<TD class="cc" rowspan="4">32 KB</TD>
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<TD class="cc">15 MB/s</TD>
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<TD class="cc" rowspan="4">40 MB/s</TD>
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<TD class="cc" rowspan="2">3 MB</TD>
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<TD class="cc" rowspan="4">2 MB</TD></TR>
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<TD class="cc">normal</TD>
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<TD class="cc">3.5 MB/s</TD></TR>
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<TD class="cc">maximum</TD>
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<TD class="cc">1.5 MB/s</TD>
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<TD class="cc" rowspan="2">4MB</TD></TR>
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<TD class="cc">ultra</TD>
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<TD class="cc">0.4 MB/s</TD>
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<TD class="cc" rowspan="3">BZip2</TD>
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<TD class="cc">normal</TD>
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<TD class="cc" rowspan="3">900 KB</TD>
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<TD class="cc">3 MB/s</TD>
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<TD class="cc" rowspan="3">16 MB/s</TD>
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<TD class="cc" rowspan="3">20 MB</TD>
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<TD class="cc" rowspan="3">7 MB</TD></TR>
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<TD class="cc">maximum</TD>
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<TD class="cc">1.2 MB/s</TD>
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<TD class="cc">ultra</TD>
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<TD class="cc">0.4 MB/s</TD>
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<DT>Dictionary size</DT>
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<P>Specifies Dictionary size for compression method.</P>
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<P>Usually, a higher Dictionary size gives a higher compression ratio.
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But compressing can be slower and it can require more memory.</P>
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Memory (RAM) usage for LZMA compressing is about 11 times more than dictionary size.
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Memory usage for LZMA decompressing is close to value of dictionary size.
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Memory usage for PPMd compressing and decompressing is almost equal
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to dictionary size.</P>
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<P>Specifies the length of words, which will be used to find identical
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sequences of bytes for compression.</P>
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<P>Usually for LZMA and Deflate, big Word size gives a little bit better
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compression ratio and slower compression process.
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A big Word size parameter can significantly increase compression ratio
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for files which contain long identical sequences of bytes. For PPMd,
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the Word size strongly affects both compression ratio and
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compression/decompression speed.</P>
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<DT>Solid Block size</DT>
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<P>Specifies the size of a solid block. You can also disable solid mode.
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In solid mode all files will be compressed as continuous data blocks.
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Usually compressing to a solid archive improves the compression ratio.
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You can use this option only for 7z archives. With the current version of 7z, you
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can update existing archives only when
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solid mode is switched off and the existing archive is non-solid.</P>
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<DT>Number of CPU threads</DT>
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<P>Specifies the number of threads for compressing.
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A big number of threads can speed up compression speed on Multi-Processor systems.
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Sometimes it can increase speed even on single-core CPU.</P>
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<DT>Split to volumes</DT>
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{Size}[b | k | m | g]
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<P>Specifies volume sizes in Bytes, Kilobytes (1 Kilobyte = 1024 bytes),
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Megabytes (1 Megabyte = 1024 Kilobytes) or Gigabytes (1 Gigabyte = 1024 Megabytes).
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If you specify only {Size}, 7-zip will treat it as bytes. It's possible to specify
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several values. Example:</P>
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<PRE class="example">
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<P>The first volume will be 10 KB, the second will be 15 KB, and all others will be 2 MB.</P>
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<P>Allows you to specify parameters for compression. See the
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<A href="../../../../cmdline/switches/method.htm">-m (Method)</A> switch description for
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more details. Omit the -m prefix (as in -m switch) when using this dialog box.<P>
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<P><B>Examples</B></P>
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<PRE class="example">
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<P>uses PPMd method for compressing files.</P>
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<PRE class="example">
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0=bcj2 1=lzma:d23 2=lzma 3=lzma b0:1 b0s1:2 b0s2:3</PRE>
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<P>uses BCJ2 filter (for x86 executables) and LZMA.</P>
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<P>Specifies update mode:</P>
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<TR> <TH width="30%">Value</TH> <TH>Meaning</TH> </TR>
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<TR> <TD>Add and replace files</TD> <TD>Add all specified files to the archive.</TD> </TR>
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<TR> <TD>Update and add files</TD> <TD>Update older files in the archive and add
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files that are new to the archive.</TD> </TR>
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<TR> <TD>Freshen existing files</TD> <TD>Update specified files in the
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archive that are older than the selected disk files.</TD> </TR>
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<TR> <TD>Synchronize files</TD> <TD>Replace specified files only if
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added files are newer. Always add those files, which are not
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present in the archive. Delete from archive those files,
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which are not present on the disk.</TD> </TR>
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<P>Specifies compression options:</P>
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<TR> <TH width="30%">Option</TH> <TH>Meaning</TH> </TR>
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<TR> <TD>Create SFX archive</TD> <TD>Create self-extracting archive. You can use this option only
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for 7z archives. Look to
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<A href="../../../../cmdline/switches/sfx.htm">-sfx (Create SFX archive)</A> switch description for
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more details about SFX modules.</TD> </TR>
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<TR> <TD>Compress shared files</TD> <TD>Compress files open for writing by another applications.</TD> </TR>
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<P>Specifies password and encryption options.</P>
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<DT>Enter password</DT>
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<DD>Specify passord here</DD>
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<DT>Reenter password</DT>
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<DD>Reenter passord here for verification</DD>
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<DT>Show Password</DT>
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<DD>Shows Password</DD>
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<DT>Encryption method</DT>
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<DD>Specifies the encryption method. For 7z format, it can be only AES-256.
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For ZIP format you can select ZipCrypto or AES-256.
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Use ZipCrypto, if you want to get archive compatible with most of the ZIP archivers.
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AES-256 provides stronger encryption, but now AES-256 is supported only
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by 7-Zip, WinZip and some other ZIP archivers.
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<DT>Encrypt file names</DT>
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<DD>Enables or disables archive header encryption, including file name encryption.</DD>
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GUI/help/fm/plugins/7-zip/add.htm
