Hi Herta, > Thanks for the reply, Johann, but given that Oracle is still using the > filesystem (unless you use raw devices or ASM), what good does caching > do in case of a hard crash? It's handled at the application level. > The O_SYNC and O_DIRECT would help. Is there any way to verify that > this is what Oracle actually does? It does: http://www.oracle.com/technology/tech/linux/htdocs/oracleonlinux_faq.html#8 http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:618260965466 (thread entitled "Commited data not "guaranteed" ?") http://www.redhat.com/magazine/013nov05/features/oracle/ You can google "Oracle O_SYNC" for more pointers (or do it yourself with strace or gdb). Johann _______________________________________________ Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
