Maybe I should've started a new thread with this question (it was in the /proc/sys/vm/bdflush thread), so I am now :) According to tests performed for this article: http://www-106.ibm.com/developerworks/linux/library/l-fs8/ "ext3's data=journal mode is incredibly well-suited to situations where data needs to be read from and written to disk at the same time." This is the situation that exists on my box. My question is: has anyone had any other real-world experience to backup the claims of the above statement? I would love to get better performance, AND have better data integrity, but that seems to good to be true :) Also, if I do use data=journal would I need to retune the journal/fs? It is a ~400GB file system with some fairly large files (none over 2GB due to limitations with UniVerse - the RDBMS system we are using). Thanks, Andy. PS Here are the specs for my CPU and disk subsystem. Let me know if you need any more info: Quad Xeon 1.4GHz w/HT enabled 8GB RAM Dell PERC (LSI/AMI Megaraid) HW RAID card 24 36GB 15K SCSI - /dev/md0 is ext3 file system on a software RAID0 array across 12 HW RAID1 arrays Andrew Rechenberg Infrastructure Team, Sherman Financial Group arechenberg@shermanfinancialgroup.com Phone: 513.707.3809 Fax: 513.707.3838 _______________________________________________ Ext3-users@redhat.com https://listman.redhat.com/mailman/listinfo/ext3-users
