Linux buffer cache effect on IO writes?
- by Patrick LeBoutillier
Hi,
I'm copying large files (3 x 30G) between 2 filesystems on a Linux server (kernel 2.6.37, 16 cores, 32G RAM) and I'm getting poor performance. I suspect that the usage of the buffer cache is killing the I/O performance.
To try and narrow down the problem I used fio directly on the SAS disk to monitor the performance.
Here is the output of 2…