Low READ/WRITE benchmark values on IBM server

krishna123

Low READ/WRITE benchmark values on IBM server 16 January 2015, 23:12

Registered: 9 years ago
Posts: 3

Hi Experts,

RamDisk benchmark values are low on server : IBM System x3850 X5 (4 * Xeon E7- 4870) with 32 * 16 GB= 512 Gb of ECC RAM.
Channel wise, RAM on this server is configured optimally. This server is having windows server 2012.

While the RamDisk gives exceptional values if it is run on laptop (win 7) with i5 CPU and 8GB RAM.

I have attached the CrystalDiskMark screenshots taken from server and the laptop.

Thank you!

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Attachments:
open | download – server.gif (92.5 KB)
open | download – laptop.gif (98.5 KB)

Andrew

Re: Low READ/WRITE benchmark values on IBM server 17 January 2015, 11:07

Admin
Registered: 18 years ago
Posts: 3 555

It looks like there's something with the I/O system as even local disk throughput on the server is slower than that on the laptop.

Could be some sort of antivirus or other monitoring software that analyses I/O activity and thus slows it down?

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krishna123

Re: Low READ/WRITE benchmark values on IBM server 18 January 2015, 02:51

Registered: 9 years ago
Posts: 3

Local disk of server performed better after configuring it as RAID 0. Now these values are better than laptop for local disk.
But still the RamDisk values are much low. Server does not have any antivirus.
I have attached latest disk mark screen shots.
No clue what is causing this. Is it because of ecc ram or numa? or any any other cause?

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Attachments:
open | download – server_raid_0.gif (89.8 KB)

Re: Low READ/WRITE benchmark values on IBM server 18 January 2015, 06:18

Registered: 14 years ago
Posts: 34

Try to enable the Allocate within the specified NUMA node only option in the RAM Disk's advanced properties.

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krishna123

Re: Low READ/WRITE benchmark values on IBM server 18 January 2015, 11:47

Registered: 9 years ago
Posts: 3

Quote
VD
Try to enable the Allocate within the specified NUMA node only option in the RAM Disk's advanced properties.

Used numa option as well earlier, but no improvement.
Any specific ramdisk version need to be used for win 2012?

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