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5 <TITLE>Add to Archive Dialog Box</TITLE>
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11 <H1>Add to Archive Dialog Box</H1>
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13 <P>Allows you to specify options for creating or updating an archive.</P>
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15 <H4>How to call this dialog box</H4>
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17 <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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18 <LI>Point to <B>7-Zip</B>, and then click the <B>Add to archive...</B> command item.</LI>
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24 <DD>Provides a space for you to specify a destination archive name.
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25 You can click "<B>...</B>" button to display "Open" dialog box
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26 that you can use to locate archive.</DD>
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28 <DT>Archive format</DT>
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29 <DD>Specifies a format of created archive. Some formats (gzip and bzip2)
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30 do not support compressing more the one file per archive.</DD>
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32 <DT>Compression level</DT>
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34 <P>Specifies compression level. There are 6 levels of compression:</P>
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36 <TR> <TH>Value</TH> <TH>Meaning</TH> </TR>
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37 <TR> <TD>Store</TD> <TD>Files will be copied to archive without compression.</TD> </TR>
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38 <TR> <TD>Fastest</TD> <TD>Fastest compression.</TD> </TR>
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39 <TR> <TD>Fast</TD> <TD>Fast compression.</TD> </TR>
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40 <TR> <TD>Normal</TD> <TD>Compression with balanced settings.</TD> </TR>
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41 <TR> <TD>Maximum</TD> <TD>Can give a higher compression ratio than Normal level.
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42 But it can be slower, and it can require more memory.</TD> </TR>
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43 <TR> <TD>Ultra</TD> <TD>Can give a higher compression ratio than Maximum level.
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44 But it can be slower, and it can require more memory.</TD> </TR>
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48 <DT>Compression method</DT>
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50 <P>Specifies compression method. Each archive format can have its own compression methods:</P>
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52 <TR> <TH>Method</TH> <TH>Description</TH> </TR>
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53 <TR> <TD>LZMA</TD> <TD>Default compression method of 7z format. It provides high
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54 compression ratio and very fast decompression.</TD> </TR>
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55 <TR> <TD>PPMd</TD> <TD>Dmitry Shkarin's PPMdH algorithm with small changes.
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56 Usually it provides high compression ratio and high speed
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57 for text files.</TD> </TR>
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58 <TR> <TD>BZip2</TD> <TD>Standard compression method based on BWT algorithm.
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59 Usually it provides high speed and pretty good
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60 compression ratio for text files.</TD> </TR>
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61 <TR> <TD>Deflate</TD> <TD>Standard compression method of ZIP and GZip formats.
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62 Compression ratio is not too high. But it provides pretty fast
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63 compressing and decompressing. Deflate method supports only
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64 32 KB dictionary.</TD> </TR>
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65 <TR> <TD>Deflate64</TD> <TD>Modified version of Deflate algorithm with
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66 bigger dictionary (64KB).</TD> </TR>
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68 <P>Estimated 7-Zip performance and memory requirements for AMD Athlon 64 X2 3800+:</P>
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71 <TH class="cc">Method</TH>
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72 <TH class="cc">Level</TH>
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73 <TH class="cc">Dictionary Size</TH>
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74 <TH class="cc">Compressing Speed</TH>
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75 <TH class="cc">Decompressing Speed</TH>
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76 <TH class="cc">Memory for Compressing</TH>
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77 <TH class="cc">Memory for Decompressing</TH>
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80 <TD class="cc" rowspan="5">LZMA</TD>
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81 <TD class="cc">fastest</TD>
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82 <TD class="cc">64 KB</TD>
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83 <TD class="cc">4.5 MB/s</TD>
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84 <TD class="cc" rowspan="5">15 MB/s</TD>
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85 <TD class="cc">3 MB</TD>
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86 <TD class="cc">3 MB</TD></TR>
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88 <TD class="cc">fast</TD>
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89 <TD class="cc">1 MB</TD>
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90 <TD class="cc">3 MB/s</TD>
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91 <TD class="cc">10 MB</TD>
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92 <TD class="cc">3 MB</TD></TR>
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94 <TD class="cc">normal</TD>
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95 <TD class="cc">16 MB</TD>
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96 <TD class="cc">2 MB/s</TD>
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97 <TD class="cc">186 MB</TD>
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98 <TD class="cc">18 MB</TD></TR>
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100 <TD class="cc">maximum</TD>
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101 <TD class="cc">32 MB</TD>
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102 <TD class="cc">1.8 MB/s</TD>
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103 <TD class="cc">376 MB</TD>
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104 <TD class="cc">34 MB</TD></TR>
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106 <TD class="cc">ultra</TD>
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107 <TD class="cc">64 MB</TD>
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108 <TD class="cc">1.6 MB/s</TD>
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109 <TD class="cc">709 MB</TD>
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110 <TD class="cc">66 MB</TD></TR>
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112 <TD class="cc" rowspan="4">PPMD</TD>
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113 <TD class="cc">fast</TD>
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114 <TD class="cc">4 MB</TD>
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115 <TD class="cc" colspan="2">1.4 MB/s</TD>
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116 <TD class="cc" colspan="2">6 MB</TD></TR>
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118 <TD class="cc">normal</TD>
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119 <TD class="cc">24MB</TD>
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120 <TD class="cc" colspan="2">1.2 MB/s</TD>
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121 <TD class="cc" colspan="2">26 MB</TD></TR>
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123 <TD class="cc">maximum</TD>
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124 <TD class="cc">64 MB</TD>
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125 <TD class="cc" colspan="2">1.0 MB/s</TD>
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126 <TD class="cc" colspan="2">66 MB</TD></TR>
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128 <TD class="cc">ultra</TD>
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129 <TD class="cc">192 MB</TD>
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130 <TD class="cc" colspan="2">0.9 MB/s</TD>
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131 <TD class="cc" colspan="2">194 MB</TD></TR>
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133 <TD class="cc" rowspan="4">Deflate</TD>
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134 <TD class="cc">fast</TD>
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135 <TD class="cc" rowspan="4">32 KB</TD>
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136 <TD class="cc">15 MB/s</TD>
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137 <TD class="cc" rowspan="4">40 MB/s</TD>
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138 <TD class="cc" rowspan="2">3 MB</TD>
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139 <TD class="cc" rowspan="4">2 MB</TD></TR>
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141 <TD class="cc">normal</TD>
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142 <TD class="cc">3.5 MB/s</TD></TR>
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144 <TD class="cc">maximum</TD>
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145 <TD class="cc">1.5 MB/s</TD>
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146 <TD class="cc" rowspan="2">4MB</TD></TR>
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148 <TD class="cc">ultra</TD>
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149 <TD class="cc">0.4 MB/s</TD>
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151 <TD class="cc" rowspan="3">BZip2</TD>
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152 <TD class="cc">normal</TD>
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153 <TD class="cc" rowspan="3">900 KB</TD>
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154 <TD class="cc">3 MB/s</TD>
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155 <TD class="cc" rowspan="3">16 MB/s</TD>
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156 <TD class="cc" rowspan="3">20 MB</TD>
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157 <TD class="cc" rowspan="3">7 MB</TD></TR>
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159 <TD class="cc">maximum</TD>
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160 <TD class="cc">1.2 MB/s</TD>
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162 <TD class="cc">ultra</TD>
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163 <TD class="cc">0.4 MB/s</TD>
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167 <DT>Dictionary size</DT>
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169 <P>Specifies Dictionary size for compression method.</P>
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170 <P>Usually, a higher Dictionary size gives a higher compression ratio.
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171 But compressing can be slower and it can require more memory.</P>
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173 Memory (RAM) usage for LZMA compressing is about 11 times more than dictionary size.
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174 Memory usage for LZMA decompressing is close to value of dictionary size.
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175 Memory usage for PPMd compressing and decompressing is almost equal
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176 to dictionary size.</P>
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181 <P>Specifies the length of words, which will be used to find identical
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182 sequences of bytes for compression.</P>
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183 <P>Usually for LZMA and Deflate, big Word size gives a little bit better
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184 compression ratio and slower compression process.
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185 A big Word size parameter can significantly increase compression ratio
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186 for files which contain long identical sequences of bytes. For PPMd,
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187 the Word size strongly affects both compression ratio and
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188 compression/decompression speed.</P>
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192 <DT>Solid Block size</DT>
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194 <P>Specifies the size of a solid block. You can also disable solid mode.
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195 In solid mode all files will be compressed as continuous data blocks.
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196 Usually compressing to a solid archive improves the compression ratio.
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197 You can use this option only for 7z archives. With the current version of 7z, you
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198 can update existing archives only when
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199 solid mode is switched off and the existing archive is non-solid.</P>
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202 <DT>Number of CPU threads</DT>
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204 <P>Specifies the number of threads for compressing.
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205 A big number of threads can speed up compression speed on Multi-Processor systems.
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206 Sometimes it can increase speed even on single-core CPU.</P>
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209 <DT>Split to volumes</DT>
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211 <PRE class="syntax">
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212 {Size}[b | k | m | g]
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215 <P>Specifies volume sizes in Bytes, Kilobytes (1 Kilobyte = 1024 bytes),
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216 Megabytes (1 Megabyte = 1024 Kilobytes) or Gigabytes (1 Gigabyte = 1024 Megabytes).
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217 If you specify only {Size}, 7-zip will treat it as bytes. It's possible to specify
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218 several values. Example:</P>
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220 <PRE class="example">
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224 <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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228 <DT>Parameters</DT>
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230 <P>Allows you to specify parameters for compression. See the
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231 <A href="../../../../cmdline/switches/method.htm">-m (Method)</A> switch description for
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232 more details. Omit the -m prefix (as in -m switch) when using this dialog box.<P>
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233 <P><B>Examples</B></P>
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234 <PRE class="example">
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236 <P>uses PPMd method for compressing files.</P>
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238 <PRE class="example">
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239 0=bcj2 1=lzma:d23 2=lzma 3=lzma b0:1 b0s1:2 b0s2:3</PRE>
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240 <P>uses BCJ2 filter (for x86 executables) and LZMA.</P>
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244 <DT>Update mode</DT>
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246 <P>Specifies update mode:</P>
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248 <TR> <TH width="30%">Value</TH> <TH>Meaning</TH> </TR>
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249 <TR> <TD>Add and replace files</TD> <TD>Add all specified files to the archive.</TD> </TR>
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250 <TR> <TD>Update and add files</TD> <TD>Update older files in the archive and add
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251 files that are new to the archive.</TD> </TR>
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252 <TR> <TD>Freshen existing files</TD> <TD>Update specified files in the
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253 archive that are older than the selected disk files.</TD> </TR>
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254 <TR> <TD>Synchronize files</TD> <TD>Replace specified files only if
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255 added files are newer. Always add those files, which are not
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256 present in the archive. Delete from archive those files,
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257 which are not present on the disk.</TD> </TR>
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263 <P>Specifies compression options:</P>
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265 <TR> <TH width="30%">Option</TH> <TH>Meaning</TH> </TR>
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266 <TR> <TD>Create SFX archive</TD> <TD>Create self-extracting archive. You can use this option only
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267 for 7z archives. Look to
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268 <A href="../../../../cmdline/switches/sfx.htm">-sfx (Create SFX archive)</A> switch description for
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269 more details about SFX modules.</TD> </TR>
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270 <TR> <TD>Compress shared files</TD> <TD>Compress files open for writing by another applications.</TD> </TR>
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274 <DT>Encryption</DT>
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276 <P>Specifies password and encryption options.</P>
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278 <DT>Enter password</DT>
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279 <DD>Specify passord here</DD>
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280 <DT>Reenter password</DT>
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281 <DD>Reenter passord here for verification</DD>
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282 <DT>Show Password</DT>
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283 <DD>Shows Password</DD>
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284 <DT>Encryption method</DT>
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285 <DD>Specifies the encryption method. For 7z format, it can be only AES-256.
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286 For ZIP format you can select ZipCrypto or AES-256.
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287 Use ZipCrypto, if you want to get archive compatible with most of the ZIP archivers.
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288 AES-256 provides stronger encryption, but now AES-256 is supported only
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289 by 7-Zip, WinZip and some other ZIP archivers.
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290 <DT>Encrypt file names</DT>
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291 <DD>Enables or disables archive header encryption, including file name encryption.</DD>
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