Low READ/WRITE benchmark values on IBM server

Started by krishna123

Low READ/WRITE benchmark values on IBM server   17 January 2015, 00:12

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!
Attachments:
open | download – server.gif (92.5 KB)
open | download – laptop.gif (98.5 KB)
SoftPerfect Support forum - Andrew avatar image

Re: Low READ/WRITE benchmark values on IBM server   17 January 2015, 12:07

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?

Re: Low READ/WRITE benchmark values on IBM server   18 January 2015, 03:51

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

Re: Low READ/WRITE benchmark values on IBM server   18 January 2015, 07:18

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

Re: Low READ/WRITE benchmark values on IBM server   18 January 2015, 12:47

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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