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- 7Profile, don't speculate!Gilles 'SO- stop being evil'– Gilles 'SO- stop being evil'2011-03-17 23:30:27 +00:00Commented Mar 17, 2011 at 23:30
- 4Interestingly, their benchmarks suggest there is little benefit above 4K however.Mikel– Mikel2011-03-18 01:24:47 +00:00Commented Mar 18, 2011 at 1:24
- 4Also, apparently the default file read ahead window is 128 KB, so that value might be beneficial.Mikel– Mikel2011-03-18 01:33:16 +00:00Commented Mar 18, 2011 at 1:33
- 12I have access to a 24 drive RAID50 here, where bs=8K gets me 197MB/s but bs=1M gets me 2.2 GB/s which is close to the theoretical throughput of the RAID. So bs matters ALOT. However using bs=10M I only get 1.7GB/s. So it appears to get worse over some threshold, but not sure why.Joseph Garvin– Joseph Garvin2015-11-02 18:22:58 +00:00Commented Nov 2, 2015 at 18:22
- 2@JosephGarvin Yes, I always find it worthwhile to play around a bit with the block size if I'm doing a large transfer. It seems the optimum block size depends on a lot of different things.sudo– sudo2017-05-06 21:01:00 +00:00Commented May 6, 2017 at 21:01
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