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<p>Hallo Bernd,</p>
<p><br></p>
<p>Mittwoch, 10. September 2008, meintest Du:</p>
<p><br></p>
<p><br></p>
<p><span class=rvts6>BS> No, you can do active/active with several systems</span></p>
<p><br></p>
<p><br></p>
<p><br></p>
<p><span class=rvts6>BS> Raid1</span></p>
<p><span class=rvts6>BS> / \</span></p>
<p><span class=rvts6>BS> OSS1 OSS2</span></p>
<p><span class=rvts6>BS> \ /</span></p>
<p><span class=rvts6>BS> Raid2</span></p>
<p><br></p>
<p><br></p>
<p><span class=rvts6>BS> (Raid1 and Raid2 are hardware raid systems).</span></p>
<p><br></p>
<p><span class=rvts6>BS> Now OSS1 will primarily serve Raid1 and OSS2 will primarily serve Raid2. So</span></p>
<p><span class=rvts6>BS> you have an active active situation. </span></p>
<p><span class=rvts6><br></span></p>
<p>this is not what you would call "active/active" in a HA-environment. If Server1 is DHCP-Server and Server2 is NFS-Server and both can take over the other service you have an "active/passive" DHCP and "active/passive" NFS. </p>
<p><br></p>
<p>Ofr Lustre you have "active/passive" for the data on RAID1 and "active/passive" for the data on RAID2. </p>
<p><br></p>
<p>But i know that in the Lustre world this scenario is called "active/active" because no hardware is idle ;-)</p>
<p><br></p>
<p>Jan </p>
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