Hi Martin,
Yes, they are in the same slot - also I checked
the BIOS and the PCI speed and type is properly negotiated
system profile ( performance)
note
This happened after I upgrade firmware on the servers - however they all have the same firmware
BAD server
lspci | grep -i Optane
04:00.0 Non-Volatile memory controller: Intel Corporation Optane DC P4800X Series SSD
GOOD server
lspci | grep -i Optane
04:00.0 Non-Volatile memory controller: Intel Corporation Optane DC P4800X Series SSD
On Thu, 25 Oct 2018 at 11:59, Martin Verges <martin.verges@xxxxxxxx> wrote:
Hello Steven,
are you sure that the systems are exact the same? Sometimes vendors
place extension cards into different PCIe slots.
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2018-10-25 17:46 GMT+02:00 Steven Vacaroaia <stef97@xxxxxxxxx>:
> Hi,
> I have 4 x DELL R630 servers with exact same specs
> I installed Intel Optane SSDPED1K375GA in all
>
> When comparing fio performance ( both read and write), when is lower than
> the other 3
> ( see below - just read)
>
> Any suggestions as to what to check/fix ?
>
> BAD server
> [root@osd04 ~]# fio --filename=/dev/nvme0n1 --direct=1 --sync=1 --rw=read
> --bs=4k --numjobs=100 --iodepth=1 --runtime=60 --time_based
> --group_reporting --name=journal-test
> journal-test: (g=0): rw=read, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T)
> 4096B-4096B, ioengine=psync, iodepth=1
> ...
> fio-3.1
> Starting 100 processes
> Jobs: 100 (f=100): [R(100)][100.0%][r=2166MiB/s,w=0KiB/s][r=554k,w=0
> IOPS][eta 00m:00s]
>
>
> GOOD server
> [root@osd02 ~]# fio --filename=/dev/nvme0n1 --direct=1 --sync=1 --rw=read
> --bs=4k --numjobs=100 --iodepth=1 --runtime=60 --time_based
> --group_reporting --name=journal-test
> journal-test: (g=0): rw=read, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T)
> 4096B-4096B, ioengine=psync, iodepth=1
> ...
> fio-3.1
> Starting 100 processes
> Jobs: 100 (f=100): [R(100)][100.0%][r=2278MiB/s,w=0KiB/s][r=583k,w=0
> IOPS][eta 00m:00s]
>
>
> many thanks
> steven
>
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>
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