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    <div class="moz-cite-prefix">On 09/22/2017 02:25 AM, Kotresh
      Hiremath Ravishankar wrote:<br>
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cite="mid:CAPgWtC6YvYrP2NZ8c=TT_-V5Kb5WOvxky29FgW1oGgiL+moVmw@mail.gmail.com">
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              <div>The volume layout of geo-replication slave volume
                could be different from master volume.<br>
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              It's not mandatory that if the master volume is arbiter
              type, the slave also needs to be arbiter.<br>
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            But if it's decided to use the arbiter both at master and
            slave, then the expansion rules is<br>
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          applicable both at master and slave.<br>
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        Adding Ravi for arbiter related question<br>
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                        <div class="gmail_quote">On Thu, Sep 21, 2017 at
                          2:07 PM, Marcus <span dir="ltr">&lt;<a
                              href="mailto:marcus.pedersen@slu.se"
                              target="_blank" moz-do-not-send="true">marcus.pedersen@slu.se</a>&gt;</span>
                          wrote:<br>
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                              <p>Hi all!</p>
                              Today I have a small gluster replication
                              on 2 machines.<br>
                              My plan is to scale this, I though need
                              some feedback that how I plan things is in
                              the right direction.<br>
                              <br>
                              First of all I have understood the need of
                              an arbiter.<br>
                              When I scale this, say that I just have 2
                              replica and 1 arbiter, when I add another
                              two machines can I still use the same
                              physical machine as the arbiter?<br>
                              Or when I add additional two machines I
                              have to add another arbiter machine as
                              well?<br>
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    <br>
    You can use the same physical machine for hosting multiple arbiter
    bricks. The general rule of brick placement is the same for any type
    of replica volume: No 2 bricks of the same replica subvolume should
    be on the same node.<br>
    <br>
    Thanks,<br>
    Ravi<br>
    <br>
    <blockquote type="cite"
cite="mid:CAPgWtC6YvYrP2NZ8c=TT_-V5Kb5WOvxky29FgW1oGgiL+moVmw@mail.gmail.com">
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                              My second question is about
                              geo-replication.<br>
                              If I want to setup a geo-replication on
                              above gluster cluster do I need to have
                              the exact "same" machines in the
                              reo-replication?<br>
                              I know that disk size should be same size
                              on both the brick and on the
                              geo-replication side.<br>
                              So if I have 2 replica and 1 arbiter, do I
                              need 2 replica and 1 arbiter for the
                              geo-replication?<br>
                              Or is it sufficient for a 2 replica and 1
                              arbiter to use 1 replica for the
                              geo-replication?<br>
                              What I wonder is when I scale my gluster
                              with additional 2 machines, do I need 2
                              machines for geo-replication or 1 machine
                              for geo-replication?<br>
                              So adding 2 machines means adding 4
                              machines in total or do I just need 3 in
                              total?<br>
                              Is there a need for a arbiter in the
                              geo-replication?<br>
                              <br>
                              Many questions, but I hope that you can
                              help me out!<br>
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                              Many thanks in advance!<br>
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                              Best regards<br>
                              Marcus Pedersén<br>
                               <br>
                              <br>
                              <div
                                class="m_-3139267781090650604moz-signature">--
                                <br>
                                <hr> <b>Marcus Pedersén</b><br>
                                <i>System administrator</i><br>
                                <br>
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                                        <b>Interbull Centre</b><br>
                                        Department of Animal Breeding
                                        &amp; Genetics — SLU<br>
                                        Box 7023, SE-750 07<br>
                                        Uppsala, Sweden<br>
                                        <br>
                                        Visiting address:<br>
                                        Room 55614, Ulls väg 26, Ultuna<br>
                                        Uppsala<br>
                                        Sweden<br>
                                        <br>
                                        Tel: <a
                                          href="tel:+46%2018%2067%2019%2062"
                                          value="+4618671962"
                                          target="_blank"
                                          moz-do-not-send="true">+46-(0)18-67
                                          1962</a><br>
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                        -- <br>
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                            <div>Thanks and Regards,<br>
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                            Kotresh H R<br>
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