**mupdate**
***********

MUPDATE server process


Synopsis
========

   **mupdate** [ **-C** *config-file* ] [ **-m** ] [ **-a** ]


Description
===========

**mupdate** is the mailboxdb aggregation server.  It accepts commands
on its standard input and responds on its standard output.  It MUST be
invoked by master(8) with those descriptors attached to a remote
client connection.

**mupdate** reads its configuration options out of the imapd.conf(5)
file unless specified otherwise by **-C**.

If the directory "log"/*user* exists under the directory specified in
the "configdirectory" configuration option, then **mupdate** will
create protocol telemetry logs for sessions authenticating as *user*.

The telemetry logs will be stored in the "log"/*user* directory with a
filename of the **mupdate** process-id.


Options
=======

-C config-file

   Use the specified configuration file *config-file* rather than the
   default imapd.conf(5).

-m

   Run as the MUPDATE master.  Default is to act as slave.

-a

   [autoselect] Check "mupdate_server" setting in imapd.conf(5) to see
   if this is the designated master server, and act as master if this
   is the case.  Otherwise act as slave.


Examples
========

**mupdate** is commonly included in the SERVICES section of
cyrus.conf(5) like so:

   SERVICES {
       imap        cmd="imapd -U 30" listen="imap" prefork=0
       imaps       cmd="imapd -s -U 30" listen="imaps" prefork=0 maxchild=100
       lmtpunix    cmd="lmtpd" listen="/var/run/cyrus/socket/lmtp" prefork=0 maxchild=20
       sieve       cmd="timsieved" listen="sieve" prefork=0
       notify      cmd="notifyd" listen="/var/run/cyrus/socket/notify" proto="udp" prefork=1
       httpd       cmd="httpd" listen=8080 prefork=1 maxchild=20
       # (mupdate master, only one in the entire cluster)
       **mupdate     cmd="mupdate -m" listen="mupdate" prefork=1**
       #
       # (mupdate slave, run on each frontend host in the cluster)
       # mupdate     cmd="mupdate" listen="mupdate" prefork=1
   }


Files
=====

/etc/imapd.conf


See Also
========

imapd.conf(5), master(8)