Ext3: Why data=journal is better than data=ordered when data needs to be read from and written to disk at the same time
I see many literatures mentioned this, but I have never seen any one
explains it in detail.(Although this link exposed the original story:
"Journal mode: This mode is the slowest except when data needs to be
read from and written to disk at the same time where it outperform all
Since this is pretty counter-intuitive, I believe many people are not
aware about the root cause, thus I won't be the last one to ask this
same question. Can any one kindly explain it so as to make it more
clear? Thank you!
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