Hi, I am running performance test between fuse vs libgfapi. I have a single node, client and server are running on same node. I have NVMe SSD device as a storage.
My volume info:: [root@sys04 ~]# gluster vol info Volume Name: vol1 Type: Distribute Volume ID: 9f60ceaf-3643-4325-855a-455974e36cc7 Status: Started Number of Bricks: 1 Transport-type: tcp Bricks: Brick1: 172.16.71.19:/mnt_nvme/brick1 Options Reconfigured: performance.cache-size: 0 performance.write-behind: off performance.read-ahead: off performance.io-cache: off performance.strict-o-direct: on fio Job file:: [global] direct=1 runtime=20 time_based ioengine=gfapi iodepth=1 volume=vol1 brick=172.16.71.19 rw=read size=128g bs=32k group_reporting numjobs=1 filename=128g.bar While doing sequential read test, I am not seeing any data transfer on device with iostat tool. Looks like gfapi engine is reading from the cache because i am reading from same file with different block sizes. But i disabled io cache for my volume. Can someone help me from where fio is reading the data? Sateesh
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