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

Lennart Sorensen lsorense at csclub.uwaterloo.ca
Tue Apr 17 10:02:14 EDT 2018

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 tests how fast md5sum can calculate the checksum of 1GB of zeroes.

Certainly in no way testing any disk speed.  Reasonable test of CPU and
ram speed perhaps.

Len Sorensen

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