rezass
commented
6 years ago Can you run iostat -Ntx -y -d 5 when cache is flushing and see the main disk utilization?
Flushing cache will not necessarily send sequential requests to the disk.
Open HJarausch opened 6 years ago
rezass
commented
6 years ago Can you run iostat -Ntx -y -d 5 when cache is flushing and see the main disk utilization?
Flushing cache will not necessarily send sequential requests to the disk.
Given, the underlying hard disk is not that fast. fio reports about 36 Mb/sec in sequential write.
But "eio_cli delete" writes only 8 Mb/sec. I've done a fio test with 10G on the cached FS which was showed about 225 Mb/sec. Then I tried to delete the cache. It wrote only 1024 blocks (a 8K) per second.