<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2900.3132" name=GENERATOR></HEAD> <BODY> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>Hi,</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>You need gfs for the changes to appear on both servers. With GFS, when one server changes a file, the other server is made aware of the changes. Also GFS takes care of file locking. Also you need a fencedevice, so the cluster can shutdown a "defective" server, and make sure it dosn't corrupt the GFS. </FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>For your current setup:</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>When you have both servers running, you could mount the ext3 fs on both servers, but only the server that writes a file, will be aware of it. The other server will be aware of the new file when you remount the fs. </FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>Hope this helps a bit.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>Kind Regards</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2>Kristoffer</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=227410612-20072007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV><BR> <DIV class=OutlookMessageHeader lang=da dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>Fra:</B> linux-cluster-bounces@redhat.com [mailto:linux-cluster-bounces@redhat.com] <B>På vegne af </B>Dan.Askew@jmsmucker.com<BR><B>Sendt:</B> 20. juli 2007 14:01<BR><B>Til:</B> linux clustering<BR><B>Emne:</B> [Linux-cluster] Linux Clustering Newbe<BR></FONT><BR></DIV> <DIV></DIV><BR><FONT face=sans-serif size=2>Greetings all,</FONT> <BR><BR><FONT face=sans-serif size=2>I am an old veteran of HP-UX Service Guard. I am trying to get a NFS linux Cluster working and need some advise.</FONT> <BR><BR><FONT face=sans-serif size=2>I have read the NFS Cookbook from Redhat and have a the following working</FONT> <BR><BR><FONT face=sans-serif size=2>2 Node Linux Cluster (RHEL AS 4.0 update 5)</FONT> <BR><BR><FONT face=sans-serif size=2>one test disk LVM formated ext3 (have not decided onGFS or not)</FONT> <BR><BR><FONT face=sans-serif size=2>Use Vitual IPAddress to access the disks via NFS</FONT> <BR><BR><FONT face=sans-serif size=2>When SYSTEMA runs the service and the client machine access the disk and makes changes. Then I fail over to SYSTEMB these changes made by the client are not present. </FONT><BR><BR><FONT face=sans-serif size=2>I am runing CLVMD deamon </FONT><BR><FONT face=sans-serif size=2>The LVM disks are mounted on both systems</FONT> <BR><FONT face=sans-serif size=2>I have made the following changes to LVM.CONF</FONT> <BR><BR><FONT face=sans-serif size=2>(I have tried locking_type = 2 and locking_type = 3) both have he same results. (as above)</FONT> <BR><BR><FONT face=sans-serif size=2>Sorry for my ignorance but can anyone tell me what I am doing wrong...would GFS solve the syncing problem? </FONT><BR><BR><BR><BR><FONT face=sans-serif size=2><BR><BR>Dan Askew<BR>Sr Systems Administrator<BR>The J. M. Smucker Company<BR><BR>Phone (330)684-3662<BR><BR></FONT></BODY></HTML>