<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On 30 Aug 2005, at 2:02 pm, david coornaert wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"> <TT>Which of these PVFS2 Lustre GPFS have some level of redundancy ?<BR></TT></BLOCKQUOTE></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>GPFS can be configured to store two copies of all the data (which helps read performance too, since it gives an extra path to the data).</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Lustre stores everything as RAID5, so I understand, and the metadata servers are in pairs, so there's plenty of redundancy there. Don't know about PVFS2, but the consensus in our group is that it has less redundancy.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Tim</DIV><BR><DIV> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">--<SPAN class="Apple-converted-space"> </SPAN></FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">Dr Tim Cutts</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">Informatics Systems Group, Wellcome Trust Sanger Institute</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">GPG: 1024D/E3134233 FE3D 6C73 BBD6 726A A3F5<SPAN class="Apple-converted-space"> </SPAN>860B 3CDD 3F56 E313 4233</FONT></P> </DIV><BR></BODY></HTML>