oracle RAC啟動序列

　　Oracle的RAC涉及到的進程很多，各進程的日誌目錄結構也非常複雜，如果不清楚各進程的啟動順序和相互關係，以及進程對應日誌的位置，在出現問題時候，排查起來非常困難。因此我做了一個簡單的總結，便於快速尋找，也的確幫我解決了一個問題。

進程屬主--進程----日誌位置

$LOG_HOME=$GRID_HOME/log/hostname/

root----/etc/init.d/init.ohasd run  --- $LOG_HOME/ohasd.log

         root ----- orarootagent.bin ------$LOG_HOME/agent/ohasd

                   root----------crsd.bin

                            grid------------oraagent.bin-----------$LOG_HOME/agent/crsd

                                     grid------clusterd asm instance

                                     grid---- tnslsnr (scan listener)

                                     grid-----tnslsnr (node listener)

                                     grid----- $GRID_HOME/opmn/bin/ons

                                     grid ---- enhanced ONS

                            oracle----------oraagent.bin-----------同上

                                     oracle --- 資料庫執行個體

                            root------------orarootagent.bin

                                     網路資源

                                     scan virtual ip

                                     node virtual ip

                                     ASM cluster file system Registry

                                     GNS

                   grid-----------diskmon.bin

                   root ---------- octssd.bin

         grid---- oraagent.bin----------------$LOG_HOME/agent/ohasd

                   grid---------- evmd.bin

                   grid---------- evmlogger.bin

                   grid --------- gipcd.bin

                   grid --------- gpnpd.bin

                   grid --------- mdbsd.bin

         root---- cssdmonitor

         root ---- cssdagent------------------$LOG_HOME/agent/ohasd

                   grid --------- ocssd.bin