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<div>Hi list,</div>
<div>I've just set up a 2 node cluster: </div>
<div>Hardare: 1 CPU (current Xeon), 12 GB RAM, RAID 1, 1 *100 Mbit, 1* 1Gbit Ethernet </div>
<div> Storage: Raid 1 (300GB), partitions for OS, Swap and DRBD-Device (160GB).</div>
<div>Software: SLES 11, drbd 8.2.7, heartbeat 2.99, Oracle 10.2.0.4</div>
<div> </div>
<div>Current drbd settings:</div>
<div> </div>
<div>global {</div>
<div> dialog-refresh 1;</div>
<div> minor-count 5;</div>
<div>}</div>
<div>common {</div>
<div> syncer {</div>
<div> rate 50M;</div>
<div> }</div>
<div> net {</div>
<div> after-sb-1pri discard-secondary;</div>
<div> after-sb-2pri disconnect;</div>
<div> after-sb-0pri discard-zero-changes;</div>
<div> }</div>
<div> startup {</div>
<div> degr-wfc-timeout 120;</div>
<div> wfc-timeout 0;</div>
<div> }</div>
<div> handlers {</div>
<div> split-brain "/usr/lib/drbd/notify-split-brain.sh root";</div>
<div> }</div>
<div>}</div>
<div>resource oradata {</div>
<div> protocol C;</div>
<div> disk {</div>
<div> on-io-error pass_on;</div>
<div> }</div>
<div> on elsserverbeta {</div>
<div> device /dev/drbd0;</div>
<div> address 192.168.5.3:7788;</div>
<div> meta-disk internal;</div>
<div> disk /dev/sda3;</div>
<div> }</div>
<div> on elsserveralpha {</div>
<div> device /dev/drbd0;</div>
<div> address 192.168.5.2:7788;</div>
<div> meta-disk internal;</div>
<div> disk /dev/sda3;</div>
<div> }</div>
<div>}</div>
<div> </div>
<div>DRBD uses the Gbit-Ethernet connection for replication.</div>
<div> </div>
<div>The DRBD-device holds the Oracle data (data and redolog files).</div>
<div> </div>
<div>The application which runs on top of the HA-Stack uses a lot of small transactions.</div>
<div>Oracle throws following warning: "log write time 760 ms, size 8 KB".</div>
<div> </div>
<div>If the drbd-stack on the second node (elsserverbeta) is stopped, the application is "fast" (2 to 3 times faster).</div>
<div> </div>
<div><font face="Arial, sans-serif">Any idea ?</font></div>
<div><font face="Arial, sans-serif"> </font></div>
<div><font face="Arial, sans-serif">Regards, Klaus</font></div>
<div><font face="Arial, sans-serif"> </font></div>
<div><font face="Arial, sans-serif"> </font></div>
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