Blame Manuals/HowTos/Dialup/Server/Usage/diskspace.docbook

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<sect1 id="server-usage-diskspace">
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    <title>Administering Disk Space</title>
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    <para>
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        The maximum number of registered user profiles is limited
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        inside the server computer, based on the maximum disk space
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        the server computer confines to such purpose. For example,
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        consider an environment where users can get registered
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        themselves using a web interface. In this case the web
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        interface must know how much disk space is available before
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        proceeding to register new mail accounts inside the server
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        computer and this way preventing any disk writing when there
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        isn't enough free space on disk to perform a new user
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        registration.  Considering the server computer has confined
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        1GB of disk space to handle the mail service (e.g., mail
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        queues, mailboxes, etc.) and each user mailbox is 10MB, it
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        will be possible to provide self-registration through the web
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        interface for 100 users in total.
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    </para>
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    <para>
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        Another measure related to save disk space might be to remove
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        unused user accounts and their related files (e.g., mailboxes)
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        from the server computer. For example, consider an environment
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        where user accounts are automatically removed from the server
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        computer when they don't establish a connection with the
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        server computer in a period greater than 7 days since the last
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        valid connection established to the server computer.  Once the
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        user account is removed, it is no longer functional of course,
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        and the person whom lost the account will need to create a new
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        one, assuming it want to have access to the mail service
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        again.
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    </para>
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</sect1>