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diff --git a/man/man1/vac.html b/man/man1/vac.html new file mode 100644 index 00000000..71f121ff --- /dev/null +++ b/man/man1/vac.html @@ -0,0 +1,160 @@ +<head> +<title>vac(1) - Plan 9 from User Space</title> +<meta content="text/html; charset=utf-8" http-equiv=Content-Type> +</head> +<body bgcolor=#ffffff> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=10><td> +<tr><td width=20><td> +<tr><td width=20><td><b>VAC(1)</b><td align=right><b>VAC(1)</b> +<tr><td width=20><td colspan=2> + <br> +<p><font size=+1><b>NAME </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + vac – create a vac archive on Venti<br> + +</table> +<p><font size=+1><b>SYNOPSIS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>vac</font></tt> [ <tt><font size=+1>−mqsv</font></tt> ] [ <tt><font size=+1>−b</font></tt> <i>blocksize</i> ] [ <tt><font size=+1>−d</font></tt> <i>oldvacfile</i> ] [ <tt><font size=+1>−e</font></tt> <i>exclude</i> + ] [ <tt><font size=+1>−f</font></tt> <i>vacfile</i> ] [ <tt><font size=+1>−i</font></tt> <i>name</i> ] [ <tt><font size=+1>−h</font></tt> <i>host</i> ] <i>file ...<br> + </i> +</table> +<p><font size=+1><b>DESCRIPTION </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <i>Vac</i> creates an archival copy of Plan 9 file trees on Venti. It + can be used to build a simple backup system. One of the unusual + properties of Venti is that duplicate blocks are detected and + coalesced. When <i>vac</i> is used on a file tree that shares data with + an existing archive, the consumption of storage will be approximately + equal to an incremental backup. This reduction in storage consumption + occurs transparently to the user. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + As an optimization, the <tt><font size=+1>−d</font></tt> and <tt><font size=+1>−q</font></tt> options, described below, can + be used to explicitly create an archive relative to an existing + archive. These options do not change the resulting archive generated + by <i>vac</i>, but simply reduce the number of write operations to Venti. + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + The output of <i>vac</i> is the hexadecimal representation of the Sha1 + fingerprint of the root of the archive, in this format:<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>vac:64daefaecc4df4b5cb48a368b361ef56012a4f46<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + </font></tt> + + </table> + Option to <i>vac</i> are:<br> + <tt><font size=+1>−b</font></tt> <i>blocksize<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Specifies the block size that data will be broken into. The units + for the size can be specified by appending <tt><font size=+1>k</font></tt> to indicate kilobytes. + The default is 8k. The size must be in the range of 512 bytes + to 52k.<br> + + </table> + <tt><font size=+1>−d</font></tt> <i>oldvacfile<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Reduce the number of blocks written to Venti by comparing the + files to be stored with the contents of an existing <i>vac</i> file tree + given by <i>oldvacfile</i>.<br> + + </table> + <tt><font size=+1>−e</font></tt> <i>exclude<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Do not include the file or directory specified by <i>exclude</i>. This + option may be repeated multiple times.<br> + + </table> + <tt><font size=+1>−f</font></tt> <i>vacfile<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + The results of <i>vac</i> are place in <i>vacfile</i>, or the standard output + if no file is given.<br> + + </table> + <tt><font size=+1>−i</font></tt> <i>name<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Include standard input as one of the input files, storing it in + the archive with the specified <i>name</i>.<br> + + </table> + <tt><font size=+1>−h</font></tt> <i>host<br> + </i> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + The network address of the Venti server. The default is taken + from the environment variable <tt><font size=+1>venti</font></tt>.<br> + + </table> + <tt><font size=+1>−m</font></tt> Expand and merge any <i>vac</i> archives that are found while reading + the input files. This option is useful for building an archive + from a collection of existing archives. Each archive is inserted + into the new archive as if it had been unpacked in the directory + in which it was found. Multiple archives can be unpacked in + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + a single directory and the contents will be merged. To be detected, + the archives must end in <tt><font size=+1>.vac</font></tt>. Note, an archive is inserted by + simply copying the root fingerprint and does not require the archive + to be unpacked.<br> + + </table> + <tt><font size=+1>−q</font></tt> Increase the performance of the <tt><font size=+1>−d</font></tt> option by detecting unchanged + files based on a match of the files name and other meta data, + rather than examining the contents of the files.<br> + <tt><font size=+1>−s</font></tt> Print out various statistics on standard error.<br> + <tt><font size=+1>−v</font></tt> Produce more verbose output on standard error, including the + name of the files added to the archive and the vac archives that + are expanded and merged.<br> + +</table> +<p><font size=+1><b>SOURCE </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>/usr/local/plan9/src/cmd/vac<br> + </font></tt> +</table> +<p><font size=+1><b>SEE ALSO </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Plan 9’s <i>vacfs</i>(4) and <i>venti</i>(8)<br> + +</table> + +<td width=20> +<tr height=20><td> +</table> +<!-- TRAILER --> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=15><td width=10><td><td width=10> +<tr><td><td> +<center> +<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a> +</center> +</table> +<!-- TRAILER --> +</body></html> |