> It is the recommended filesystem for the application I'm going to use. it's also very much not supported by Red Hat. At all. > Heavy use > of mysql 24/7. Thats why I want the filesystem on at least one partition. ext3 isn't too bad for mysql either; reiserfs' strength is the case where you have ten and ten thousands of files in a single directory; however databases don't do that. You may want to change journalling mode to be writeback, eg the same as reiserfs (by default ext3 has a more strict journalling mode which costs some performance but gives higher data integrity, not just metadata integrity like reiserfs does in rhel3; however you can turn this off to the same level as protection as reiserfs gives and get back the performance costs. Also these costs are only on file creation/extension, not something databases do a lot)
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