Hello all,
I'm new to using FreeNas and would like to know if anyone can help me with diagnosing my slow read performance.
I currently have FreeNas setup as a VM on my xcp-ng server. The VM is configured with 64GB of ram, and direct access to the raid card that was flash into IT mode. I have 10 WD 2.5 blue 2TB drives attached to it in one Zpool using RAIDZ2.
My write speed is good. I performed a DD check directly on the FreeNas box and get a write throughput of 392MB/s, but my read speeds are on the slow side at 93MB/s. I'm just curious if I have something miss configured. I have syncing turned off, but I'm kinda of lost on what else to do. I know the WD Blue 2.5 drives are slow, but with 10 of them I figured the read speed would be a bit better. If I transfer a file off the NAS to my desktop I get a throughput of around 30MB/s using a SMB share. If I recopy the file a second time once it has been cached I get a full 110MB/s. My transfer speed to the NAS is 110MB/s, which makes sense it is just loading it to the memory. It seems like I need a L2ARC, but how much help would that truly be?
Thanks for any help you can provide!
I'm new to using FreeNas and would like to know if anyone can help me with diagnosing my slow read performance.
I currently have FreeNas setup as a VM on my xcp-ng server. The VM is configured with 64GB of ram, and direct access to the raid card that was flash into IT mode. I have 10 WD 2.5 blue 2TB drives attached to it in one Zpool using RAIDZ2.
My write speed is good. I performed a DD check directly on the FreeNas box and get a write throughput of 392MB/s, but my read speeds are on the slow side at 93MB/s. I'm just curious if I have something miss configured. I have syncing turned off, but I'm kinda of lost on what else to do. I know the WD Blue 2.5 drives are slow, but with 10 of them I figured the read speed would be a bit better. If I transfer a file off the NAS to my desktop I get a throughput of around 30MB/s using a SMB share. If I recopy the file a second time once it has been cached I get a full 110MB/s. My transfer speed to the NAS is 110MB/s, which makes sense it is just loading it to the memory. It seems like I need a L2ARC, but how much help would that truly be?
Thanks for any help you can provide!