The content of a ZEO section describe operational parameters of a ZEO server except for the storage(s) to be served. The address at which the server should listen. This can be in the form 'host:port' to signify a TCP/IP connection or a pathname string to signify a Unix domain socket connection (at least one '/' is required). A hostname may be a DNS name or a dotted IP address. If the hostname is omitted, the platform's default behavior is used when binding the listening socket ('' is passed to socket.bind() as the hostname portion of the address). Flag indicating whether the server should operate in read-only mode. Defaults to false. Note that even if the server is operating in writable mode, individual storages may still be read-only. But if the server is in read-only mode, no write operations are allowed, even if the storages are writable. Note that pack() is considered a read-only operation. The storage server keeps a queue of the objects modified by the last N transactions, where N == invalidation_queue_size. This queue is used to speed client cache verification when a client disconnects for a short period of time. The address at which the monitor server should listen. If specified, a monitor server is started. The monitor server provides server statistics in a simple text format. This can be in the form 'host:port' to signify a TCP/IP connection or a pathname string to signify a Unix domain socket connection (at least one '/' is required). A hostname may be a DNS name or a dotted IP address. If the hostname is omitted, the platform's default behavior is used when binding the listening socket ('' is passed to socket.bind() as the hostname portion of the address). The maximum amount of time to wait for a transaction to commit after acquiring the storage lock, specified in seconds. If the transaction takes too long, the client connection will be closed and the transaction aborted. The name of the protocol used for authentication. The only protocol provided with ZEO is "digest," but extensions may provide other protocols. The path of the database containing authentication credentials. The authentication realm of the server. Some authentication schemes use a realm to identify the logical set of usernames that are accepted by this server. The full path to the file in which to write the ZEO server's Process ID at startup. If omitted, $INSTANCE/var/ZEO.pid is used. $INSTANCE/var/ZEO.pid (or $clienthome/ZEO.pid)