Problem with GFS read and write performance
I am using iozone to obtain read and write performance of GFS. I have a single logical volume with the GFS filesystem and mounted it on one server. I have used lock_nolock locking protocol to ensure it is treated as local filesystem.
When i run multiple threads of iozone on the GFS partition, I observe that the performance(read and write) numbers decreases as the no.of iozone thread increases.
Is this expected behaviour ? If yes, then how do check for scalability because as we increase the iozone threads the performance numbers would be decrementing.
Thanks in Advance,