Christiaan Willemsen wrote:
So, what you are basically saying, is that a single mirror is in general
more than enough to facilitate the transaction log.
http://www.commandprompt.com/blogs/joshua_drake/2008/04/is_that_performance_i_smell_ext2_vs_ext3_on_50_spindles_testing_for_postgresql/
http://wiki.postgresql.org/wiki/HP_ProLiant_DL380_G5_Tuning_Guide
And to answer your question, yes. Transaction logs are written
sequentially. You do not need a journaled file system and raid 1 is
plenty for most if not all work loads.
Sincerely,
Joshua D. Drake
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