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RN102 Expected Performance?
I purchased an RN102 a few weeks ago and have just gotten it around to setting it up. It was the preconfigured model with 4TB (2x2TB Toshiba Drives).
Reading the report at smallnetbuilder, it looks like in RAID1 they were achieving 49.1MB/s write and 83.3MB/s read. I can't even come close to that. I assume that was with NFS, but both my NFS and SMB test are about equal. From a Windows 2012 (or Win 2008 R2) server (which is a guest in ESX) I can only seem to get about 45.5 write (not terrible!) but my reads are only about 52-53MB/s. The reads seem to fluctuate like crazy though, sometimes the reads will only be in the mid 30's range.
Am I dreaming of 49.1/83.3 with this unit? My writes using standard windows file copy are usually only in the 35 range, robocopy seems the slowest to NFS. I am able to get a test file of 1024MB sent to the NAS in about 22-24 seconds.
Any thoughts? RN is using 6.1.4, NFS 32kb with 8 threads (all default). Windows 2012 which seems to perform a little better uses an rsize of 64kb it seems, while 2008 use 32kb.
I have both systems connected to a dedicated 1gb unmanaged switch which has a single port uplink to the rest of the network. I want to get the performance sorted before I copy over everything from ESX to the NAS.
Reading the report at smallnetbuilder, it looks like in RAID1 they were achieving 49.1MB/s write and 83.3MB/s read. I can't even come close to that. I assume that was with NFS, but both my NFS and SMB test are about equal. From a Windows 2012 (or Win 2008 R2) server (which is a guest in ESX) I can only seem to get about 45.5 write (not terrible!) but my reads are only about 52-53MB/s. The reads seem to fluctuate like crazy though, sometimes the reads will only be in the mid 30's range.
Am I dreaming of 49.1/83.3 with this unit? My writes using standard windows file copy are usually only in the 35 range, robocopy seems the slowest to NFS. I am able to get a test file of 1024MB sent to the NAS in about 22-24 seconds.
Any thoughts? RN is using 6.1.4, NFS 32kb with 8 threads (all default). Windows 2012 which seems to perform a little better uses an rsize of 64kb it seems, while 2008 use 32kb.
I have both systems connected to a dedicated 1gb unmanaged switch which has a single port uplink to the rest of the network. I want to get the performance sorted before I copy over everything from ESX to the NAS.
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- Just checked and continuous protection is actually off. So is AV. Best to just keep waiting for OS 6.1.5?
- I loaded up 6.1.5 and I still cannot come even close to the 85MB/s read, I can barely break 55.
SMB is definitely faster than NFS, which is weird. My writes are between 35 and 55 depending on which method. My MacBook Pro (w/SSD) over SMB is fastest to write, about 55, but the read is level at 55.
the free benchmark listed above was giving me an abysmal 20mb write or something awful like that. Windows explorer does about 40.
Any tips? These are new Seagate 4TB drives, the 5900 RPM model on the HCL.
edit: is there a period of time where the transfer needs to sync between the raid? After letting a file sit for about 15 minutes, I'm getting read speeds of 90mb/s - when writing to the NAS both drives should be written in parallel.
- Obvious questions but not asked yet :
Is the volume rebuilding ? (I believe it would take 14 to 24H for raid1 with 4To)
Is your network OK ? (no TCP retransmit, no lost packets, your mac no using wifi as top priority even with cable plugged...)
Do you have background apps like torrent downloader, a server app or that kind of thing ?
For info, my RN104 (which has the same hardware with 4 disks) does 90-100 read and 40-50 write with 4 seagate NAS HDD (test OS is win2012R2 with two caviar black in raid0 via CIFS/SMB). The limiter is the CPU. Maybe you should try to disable unused protocols and apps to keep CPU usage low. Speed fluctuates with file size and sometimes, the NAS pauses (drop to 0bytes/s for 2 or 3 seconds, don't know why).
Raid should be splitting between disks on the fly, otherwise raid5 would be a nightmare ;) and raid1 useless if a disk fails before the resync.
if you have enabled SSH (and then already ignored the warning), you should be able to see if the CPU is crawling or not with "top", if you see high %WA, then check network and disk.
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