Hi. Let's see article from http://wiki.centos.org/HowTos/Ha-Drbd
Let's do commands: [EMAIL PROTECTED] /]# drbdadm primary repdata ; mount /dev/drbd0 /repdata [EMAIL PROTECTED] /]# dd if=/dev/urandom of=/repdata/test.file bs=1000000c count=1000; ip l set eth0 down; [EMAIL PROTECTED] /]# ls -l /repdata/test.file -rw-r--r-- 1 user users 1000000000 Sep 15 15:07 /repdata/test.file [EMAIL PROTECTED] /]# drbdadm primary repdata ; mount /dev/drbd0 /repdata [EMAIL PROTECTED] /]# ls -l /repdata/test.file -rw-r--r-- 1 user users 868456004 Sep 15 15:07 /repdata/test.file As you will see there will be different sizes. But they SHOULD be the same. If we will add to mount command the option '-o sync', than there will be no differences in sizes. But in case of 'bs=1c' in dd command the file creation will be very and very slow because of turned off chaching. Anybody knows this issue? SHOULD I turn off caching om ALL underling devices and filesystems to get HA cluster filesystem? -- Regards, Alexandr A. Panko _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
