We help IT Professionals succeed at work.

Speed NAS Datastorage in ESX 5.0

lnrivera
lnrivera asked
on
Hi,

I have a NAS connected to ESX 5.0 (1Gbps) as a datastore for backup purposes.

I have a second NIC only to connect to the NAS, and I enabled jumbo frame (9000 MTU) (In the NAS and in the NIC of the ESX)

But the speed rate is too slow (About 5 MB/s), Have you got any suggestion to improve the transfer speed?

Regards
Comment
Watch Question

What's the Make and Model of the NAS?

Author

Commented:
Ctera C400
Neil RussellTechnical Development Lead
CERTIFIED EXPERT

Commented:
What are you using to backup? What are you backing up? VM's or content from inside the VM's?

Author

Commented:
The question is the speed of the copy process From the main datastore to the NAS datastore of the full VM
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017

Commented:
check with Jumbo Frames enabled and disabled, Jumbo Frames does not always work well.

What disks are installed in your NAS, SATA? and what RAID are you using?

Author

Commented:
I try with and whithout jumbo frames.

The disk are sata and we use RAID5
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017

Commented:
RAID10 would give you better performance, but SATA disks do not perform well.
Neil RussellTechnical Development Lead
CERTIFIED EXPERT

Commented:
Your answer is there! SATA.
Using a SATA NAS for datastores is a big NO NO. You are not going to achieve any kind of throughput that approaches anything like a good usable speed while you are using a SATA NAS with Virtualization, sorry.

Author

Commented:
I only want to do a backup
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017

Commented:
Are you connected via NFS or iSCSI?

iSCSI may give you better throughput?

Author

Commented:
I try with both

Author

Commented:
Maybe the rate speed issue could be related with the RAID stripe size parameters?

Regards
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017

Commented:
RAID10 may give you better read and write, but SATA disks do not perform well.

now many SATA disks in the RAID set?

Author

Commented:
4
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017

Commented:
if you are prepared to change to RAID10, this might give you better performance slightly.

But the bottleneck is likely to be the SATA disks.

Author

Commented:
RAID10 is not supported, only RAID 0,1 o 5
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017

Commented:
looks like you have reached it's maximum performance.

Author

Commented:
Are you sure that 5 MB/s is the maximum speed of RAID5 using SATA disk?
VMware and Virtualization Consultant
CERTIFIED EXPERT
Fellow
Expert of the Year 2017
Commented:
turn OFF jumbo frames, and retest

Explore More ContentExplore courses, solutions, and other research materials related to this topic.