High IOPS x low read/writes - What??

[Gregorio Silveira]

Hi freends,

I have one cenario with this weapons:

Intel S1200V3RP, Intel(R) Xeon(R) CPU E3-1220 v3 @ 3.10GHz, 8GB ECC memory, 2 NIC gigabit, 5 disks 1TB and one ZFS POOL RAIDZ.

I'm testing my ambient and need some help. My graphics are showed by Zabbix.

First test:

Pardale software:

iSCSI Disk on Microsoft Windows 2012 - NTFS quickly formated: File Size 4000KB +
1MByte Block Size:

Seq. Write Speed: 64 MB/s
Random QD32: 7.7 MB/s, 1972.8 IOPS, 0.51 ms

Seq. Read Speed: 59.6 MB/s
Random QD32: 10.7 MB/s, 2743.3 IOPS, 0.36 ms

iSCSI Disk on Microsoft Windows 2012 - NTFS quickly formated: File Size 4000KB +
64 kB Block Size:

Seq. Write Speed: 35.2 MB/s
Random QD32: 7.8 MB/s, 1991 IOPS, 0.50 ms

Seq. Read Speed: 45.3 MB/s
Random QD32: 10.7 MB/s, 2731.3 IOPS, 0.37 ms

I didn't understood the relation about low read/write and high IOPS!

 

[zambanini]

did you read cyberjocks noob guide? ; )

 

[Gregorio Silveira]

did you read cyberjocks noob guide? ; )

Yes! :)

 

[zambanini]

your ntfs block size is far to big.
zfs block size and iops are reverse related.