DISKSPD 2.0.21a 9/21/2018

[featured_image]
Download
Download is available until [expire_date]
  • Version
  • Download 17
  • File Size 176.29 KB
  • File Count 1
  • Create Date July 18, 2021
  • Last Updated July 18, 2021

DISKSPD 2.0.21a 9/21/2018

50GB File Creation (Change Drive Letter)

diskspd.exe –c50G -d300 -r -w40 -t8 -o32 -b64K -Sh -L E:diskpsdtmp.dat > DiskSpeedResults.txt

 

  • -c50G – file size 50 GB (it is better to use a large file size so that it does not fit in the cache of the storage controller);
  • -d300 – test duration in seconds;
  • -r – random read/write operations (if you need to test sequential access, use –s);
  • -t8 – number of threads;
  • -w40 – ratio of write to read operations 40%/60%;
  • -o32 — queue length;
  • -b64K — block size;
  • -Sh — do not use cache;
  • -L — measure latency;
  • E:diskpsdtmp.dat – test file path.

I have found some recommendations for disk performance in IOPS for some popular Microsoft services:

  1. Microsoft Exchange 2010 with 5,000 users, each of them receives 75 and sends 30 emails per day, will require at least 3,750 IOPS;
  2. Microsoft SQL 2008 Server with 3,500 SQL transactions per second (TPS) requires 28,000 IOPS;
  3. A common Windows application server for 10-100 users requires 10-40 IOPS.

most important disk performance metrics

Using Microsoft Performance Monitor

The recommended Average Disk sec/Read value is below 8ms

Value (ms) Performance
< 8 Excellent
8 – 12 OK
12 – 20 Fair
> 20 Bad

Average Disk sec/Write

Value (ms) Performance
< 1 Excellent
1 – 2 OK
2 – 4 Fair
> 4 Bad

Average Disk sec/Transfer

You can skip to the end and leave a response. Pinging is currently not allowed.

Leave a Reply

You must be logged in to post a comment.

Powered by WordPress and Bootstrap4