[GTALUG] New Desktop PC -- debian Linux - Proposed 2 TB HDD Partitioning;

[Jamon Camisso]

On 2018-04-18 07:35 AM, Russell via talk wrote:
> 
> 
> On April 17, 2018 9:02:14 AM CDT, lsorense at csclub.uwaterloo.ca wrote:
>> On Tue, Apr 17, 2018 at 08:20:47AM -0400, Russell via talk wrote:
>>> Currently I have two versions of the same os on the same machine. One
>> on M.2 Xpoint nvram and one on a standard SSD. I'm playing around with
>> tweaking before I do a final config. So far the Xpoint direct hw access
>> appears 3x as fast as the SSD while real world throughput shows up
>> about twice as fast on the Xpoint, recent INTEL cache fencing
>> notwithstanding.
>>>
>>> dd if=/dev/zero bs=1M count=1024 | md5sum
>>> 1024+0 records in
>>> 1024+0 records out
>>> 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.35008 s, 795 MB/s
>>> cd573cfaace07e7949bc0c46028904ff  -
>>>
>>> 795 is just under twice as fast as writing to the conventional SSD.
>>
>> That command didn't write anything to anywhere.
> 
> It wrote a bunch of zeros to a virtual file. Perhaps even touching a tmp file along the way. Even if it didnt touch tmp, it wrote the zeros someplace in order to perform the count.
> 
> I was just trying to comment on the speeds of the two installs relative to the respective  disks the OS runs from. I'm sorry you didn't understand that. Perhaps I should have said running the OS from the two different drives, irrespective of all the other disk writes which may happen when the OS operates normally when calling dd from a GUI.

Try bonnie++ a few times on each install. It is explicitly designed to
test drive performance.

Cheers, Jamon