-How bad is this? :)
Chris Embree 2013-07-09, 02:12
Hey Hadoop smart folks....
I have a tendency to seek optimum performance given my understanding, so
that led to me "brilliant" decision. We settled on EXT4 for our underlying
FS for HDFS. Greedy for speed I thought, let's turn the journal off and
gain the speed benefits. After all, I have 3 copies of the data.
How much does this bother you, given we have a 21 node prod and only 10
node dev cluster.
I'm embarrassed to say I did not capture good pre and post change I/O. In
my simple brain, not writing to journal just screams improved I/O.
Don't be shy, tell me how badly I have done bad things. (I originally said
"screwed the pooch" but I reconsidered our > USA audience. ;)
If I'm not incredibly wrong, should we consider higher speed (less safe)
Correct/support my thinking.
Harsh J 2013-07-09, 07:25