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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:18:56 +0000 |
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| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:18:56 +0000 |
| commit | b7c15c31519dc44c1f691e0466badd556ffe9423 (patch) | |
| tree | f944572f288bab482a615e09af627d9a2b6727d8 /html/MEMCACHE_README.html | |
| parent | Initial commit. (diff) | |
| download | postfix-b7c15c31519dc44c1f691e0466badd556ffe9423.tar.xz postfix-b7c15c31519dc44c1f691e0466badd556ffe9423.zip | |
Adding upstream version 3.7.10.upstream/3.7.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'html/MEMCACHE_README.html')
| -rw-r--r-- | html/MEMCACHE_README.html | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/html/MEMCACHE_README.html b/html/MEMCACHE_README.html new file mode 100644 index 0000000..a57a9eb --- /dev/null +++ b/html/MEMCACHE_README.html @@ -0,0 +1,76 @@ +<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/html4/loose.dtd"> + +<html> + +<head> + +<title>Postfix memcache client Howto</title> + +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + +</head> + +<body> + +<h1><img src="postfix-logo.jpg" width="203" height="98" ALT="">Postfix memcache client Howto</h1> + +<hr> + +<h2>Introduction</h2> + +<p>The Postfix memcache client allows you to hook up Postfix to a +memcache server. The current implementation supports one memcache +server per Postfix table, with one optional Postfix database that +provides persistent backup. The Postfix memcache client supports +the lookup, update, delete and sequence operations. The sequence +(i.e. first/next) operation requires a backup database that supports +this operation. </p> + +<p> Typically, the Postfix memcache client is used to reduce query +load on a persistent database, but it may also be used to query a +memory-only database for low-value, easy-to-recreate, information +such as a reputation cache for <a href="postscreen.8.html">postscreen(8)</a>, <a href="verify.8.html">verify(8)</a> or greylisting. +</p> + +<h2>Limitations</h2> + +<ul> + +<li> <p> The Postfix memcache client cannot be used for security-sensitive +tables such as <tt><a href="postconf.5.html#alias_maps">alias_maps</a></tt> (these may contain "<tt>|command</tt>" +and "<tt>/file/name</tt>" destinations), or <tt><a href="postconf.5.html#virtual_uid_maps">virtual_uid_maps</a></tt>, +<tt><a href="postconf.5.html#virtual_gid_maps">virtual_gid_maps</a></tt> and <tt><a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a></tt> (these +specify UNIX process privileges or "<tt>/file/name</tt>" destinations). +Typically, a memcache database is writable by any process that can +talk to the memcache server; in contrast, security-sensitive tables +must never be writable by the unprivileged Postfix user. </p> + +<li> <p> The Postfix memcache client requires additional configuration +when used as <a href="postscreen.8.html">postscreen(8)</a> or <a href="verify.8.html">verify(8)</a> cache. For details see the +<tt>backup</tt> and <tt>ttl</tt> parameter discussions in the +<a href="memcache_table.5.html">memcache_table(5)</a> manual page. </p> + +</ul> + +<h2>Building Postfix with memcache support</h2> + +<p>The Postfix memcache client has no external dependencies, +and is therefore built into Postfix by default. </p> + +<h2>Configuring memcache lookup tables</h2> + +<p> Configuration is described in the <a href="memcache_table.5.html">memcache_table(5)</a> manpage. </p> + +<h2>Credits</h2> + +<p> The first memcache client for Postfix was written by Omar Kilani, +and was based on the libmemcache library. </p> + +<p> Wietse wrote the current memcache client from the ground up for +Postfix version 2.9. This implementation does not use libmemcache, +and bears no resemblance to earlier work. </p> + +</body> + +</html> |