> ...About one year ago I considered moving to a journaling file system, but > opted not to because it seems like that's what WAL does for us already. How > does putting a journaling file system under it add more reliability?
WAL only works if the WAL files are actually written to disk and can be read off it again. Ext2 has a number of deficiencies which can cause problems with this basic operation (inode corruptions, etc). Journaling does not directly help.
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