>From the performance gallery... Be aware that ext3 journal normally is only the meta data. So when something bad happens, you know *which* files are lost, but you don't have their contents. So when there is no file creation activity, the journal does not add much value. Unless you make ext3 do data journal which gets very expensive.
A database typically creates a few big files and the does its own thing inside those files. Some people will still use ext3 because they always did or because ext3 sounds better than ext2. From profiling data I noticed that the extra CPU cost spent in the ext3 journaling can be significant. That's a waste when it does not add any value. PS The same is true for the typical "firewall disabled" that leaves the iptables and conntract kernel modules in with all gates wide open. If you have a lot of network traffic, some improvement is in dropping the modules. But that's a different story... Rob ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
