[ebay BO] RMS-200/8G PCI-e NVRAM Accelerator 360$

Patrick

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Hey @Monoman here is what I am getting with the same command via a FreeBSD 12 LiveCD:
Radian Memory Systems RMS-200 diskinfo.jpg
At first I thought it was completely due to the system, but then I tried an Intel DC P4801X 100GB drive and saw this:
Intel Optane DC P4801X diskinfo.jpg
I was hoping that with the RMS-200 drive being NVMe it would work well with the default NVMe driver. Apparently not.
 
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rshakin

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Jan 15, 2019
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Try maybe the Free Nas image I had that issue with my PMC drive with old version of Free nas
 

Patrick

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Ok that is really interesting. Using FreeNAS 11.2-U3
Code:
/dev/nvd0
        512             # sectorsize
        100030242816    # mediasize in bytes (93G)
        195371568       # mediasize in sectors
        0               # stripesize
        0               # stripeoffset
        INTEL SSDPEL1K100GA     # Disk descr.
        PHKM9015000G100D        # Disk ident.
        Yes             # TRIM/UNMAP support
        0               # Rotation rate in RPM
Synchronous random writes:
         0.5 kbytes:     28.8 usec/IO =     17.0 Mbytes/s
           1 kbytes:     28.6 usec/IO =     34.1 Mbytes/s
           2 kbytes:     27.4 usec/IO =     71.3 Mbytes/s
           4 kbytes:     22.5 usec/IO =    173.3 Mbytes/s
           8 kbytes:     31.1 usec/IO =    251.0 Mbytes/s
          16 kbytes:     45.5 usec/IO =    343.3 Mbytes/s
          32 kbytes:     69.5 usec/IO =    449.5 Mbytes/s
          64 kbytes:    112.5 usec/IO =    555.7 Mbytes/s
         128 kbytes:    177.1 usec/IO =    705.9 Mbytes/s
         256 kbytes:    300.3 usec/IO =    832.5 Mbytes/s
         512 kbytes:    527.1 usec/IO =    948.6 Mbytes/s
        1024 kbytes:    971.1 usec/IO =   1029.8 Mbytes/s
        2048 kbytes:   1861.0 usec/IO =   1074.7 Mbytes/s
        4096 kbytes:   3677.6 usec/IO =   1087.7 Mbytes/s
        8192 kbytes:   7311.3 usec/IO =   1094.2 Mbytes/s
/dev/nvd1
        512             # sectorsize
        8581545984      # mediasize in bytes (8.0G)
        16760832        # mediasize in sectors
        0               # stripesize
        0               # stripeoffset
        RMS-200         # Disk descr.
        0002477         # Disk ident.
        Yes             # TRIM/UNMAP support
        0               # Rotation rate in RPM
Synchronous random writes:
         0.5 kbytes:     26.0 usec/IO =     18.8 Mbytes/s
           1 kbytes:     25.2 usec/IO =     38.7 Mbytes/s
           2 kbytes:     25.9 usec/IO =     75.5 Mbytes/s
           4 kbytes:     27.4 usec/IO =    142.8 Mbytes/s
           8 kbytes:     28.6 usec/IO =    273.2 Mbytes/s
          16 kbytes:     72.5 usec/IO =    215.5 Mbytes/s
          32 kbytes:     83.5 usec/IO =    374.3 Mbytes/s
          64 kbytes:    107.1 usec/IO =    583.4 Mbytes/s
         128 kbytes:    156.2 usec/IO =    800.1 Mbytes/s
         256 kbytes:    212.5 usec/IO =   1176.4 Mbytes/s
         512 kbytes:    293.0 usec/IO =   1706.3 Mbytes/s
        1024 kbytes:    461.1 usec/IO =   2168.9 Mbytes/s
        2048 kbytes:    766.8 usec/IO =   2608.2 Mbytes/s
        4096 kbytes:   1428.0 usec/IO =   2801.1 Mbytes/s
        8192 kbytes:   2746.0 usec/IO =   2913.4 Mbytes/s
 
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rshakin

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Jan 15, 2019
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Yeah lots of fun... Right ;) as long as freenas won't change what ever they did to nvme driver you could back Port it to your freebsd and load that driver from boot
 

rshakin

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What are your specs on the system, I am hitting a bottle neck somewhere... Might be my ram or processor
 

Patrick

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That was with an Intel Xeon Gold 6240 single CPU in a Supermicro X11 motherboard
 

drros

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Mar 22, 2019
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Does this device have any endurance or something like that? Looks like a really good choice for SLOG if it doesn't have any "wearing parts".
 

rshakin

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Jan 15, 2019
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Well the only thing that can and will wear out is the capacitor... Everything else well pretty much ram and nand flash...
 

rshakin

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Jan 15, 2019
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Radiant does not make these anymore... But this seems a great choice for a slog. Also I've been using a pmc flashtec drive for that purpose, abeit with some caveats, but also works great if you have a ups.
 

rshakin

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Jan 15, 2019
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It only writes to nand on power failure or complete shutdown... So cycle usage would out live most of the system
 

MiniKnight

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Mar 30, 2012
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NYC
It only writes to nand on power failure or complete shutdown... So cycle usage would out live most of the system
It's also SLC NAND so write endurance is MUCH higher than TLC/ QLC. If you're pushing 8GB to two 32GB SLC NAND devices and had a minute between for cap recharge, it'd be hard to do that much even power cycling every few minutes.
 
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Monoman

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Oct 16, 2013
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Hey @Monoman here is what I am getting with the same command via a FreeBSD 12 LiveCD:
View attachment 11140
At first I thought it was completely due to the system, but then I tried an Intel DC P4801X 100GB drive and saw this:
View attachment 11141
I was hoping that with the RMS-200 drive being NVMe it would work well with the default NVMe driver. Apparently not.
It appears we had the same results. I have seen your freenas results, will replicate :D
 
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rshakin

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Confirmed and replicated same results works great.....

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning: 0x00
Temperature: 46 Celsius
Available Spare: 0%
Available Spare Threshold: 0%
Percentage Used: 0%
Data Units Read: 95,513,598,780 [48.9 PB]
Data Units Written: 96,577,229,991 [49.4 PB]
Host Read Commands: 1,148,532,179
Host Write Commands: 1,220,615,011
Controller Busy Time: 430
Power Cycles: 19
Power On Hours: 3,293
Unsafe Shutdowns: 14
Media and Data Integrity Errors: 0
Error Information Log Entries: 1

Error Information (NVMe Log 0x01, max 63 entries)
No Errors Logged


[root@freenas ~]# diskinfo -wS /dev/nvd0
/dev/nvd0
512 # sectorsize
8581545984 # mediasize in bytes (8.0G)
16760832 # mediasize in sectors
0 # stripesize
0 # stripeoffset
RMS-200 # Disk descr.
0085217 # Disk ident.
Yes # TRIM/UNMAP support
0 # Rotation rate in RPM

Synchronous random writes:
0.5 kbytes: 25.9 usec/IO = 18.9 Mbytes/s
1 kbytes: 26.6 usec/IO = 36.7 Mbytes/s
2 kbytes: 26.8 usec/IO = 72.9 Mbytes/s
4 kbytes: 30.3 usec/IO = 129.0 Mbytes/s
8 kbytes: 33.5 usec/IO = 233.4 Mbytes/s
16 kbytes: 45.9 usec/IO = 340.4 Mbytes/s
32 kbytes: 56.3 usec/IO = 555.2 Mbytes/s
64 kbytes: 66.5 usec/IO = 940.3 Mbytes/s
128 kbytes: 118.0 usec/IO = 1059.6 Mbytes/s
256 kbytes: 137.3 usec/IO = 1821.4 Mbytes/s
512 kbytes: 176.6 usec/IO = 2830.5 Mbytes/s
1024 kbytes: 315.6 usec/IO = 3169.0 Mbytes/s
2048 kbytes: 540.0 usec/IO = 3703.8 Mbytes/s
4096 kbytes: 1020.7 usec/IO = 3918.9 Mbytes/s
8192 kbytes: 1835.7 usec/IO = 4358.1 Mbytes/s
[root@freenas ~]#
 

rshakin

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Jan 15, 2019
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Yes, but I am sure this thing is going to be a fun little addition for my freenas server.
 

Patrick

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@rshakin mind sharing the FreeNAS version/ your system specs? It looks like you are getting the best performance of anyone.
 

rshakin

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Jan 15, 2019
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FreeNas 11 - u3 version no power saving features the card is plugged in on its own x16 slot only to CPU 1 socket all the rest are CPU socket 2 the key to much low latency is to have it on a separate pciex bus. No power saving full fan profile sounds like a jet engine to help with cooling and power distribution... These do take quite a power hungry so it's better to have it alone. Also this is a ddr 3 low latency 1833