Solved

iscsi speed

Posted on 2013-11-14
8
549 Views
Last Modified: 2013-12-01
Experts up there, if we use software iscsi initiator in the esxi, What will be the iscsi speed?
I see the vswitches uses nic teaming policy and grouped 4 physical NIC
Is it it 1GB iscsi or 10GB ?
Are not supposed to have HBA for 10GB and switches should support 10GB port etc ?
 how do i find out whether I am using 10GB or 1GB?
0
Comment
Question by:sara2000
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 200 total points
ID: 39649549
Its recommended to use multi path for iSCSI rather than teaming.
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 200 total points
ID: 39649557
Your speed is determined by your physical nic speed so do you have 1GB or 10GB NICs bound to iSCSI also what your SAN is compatible with 1GB or 10GB
0
 
LVL 9

Assisted Solution

by:dipopo
dipopo earned 100 total points
ID: 39650842
The speed will be the speed of the physical NIC.

The truth of the matter is that iSCSI over a 1GB network is a waste of time really as the guaranteed throughput is about 125MB, even with jumbo frames you only get 10% improvement.

With 10GB connectivity however, the story changes drastically, as you can get a 85% performance boost with jumbo frames.
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 
LVL 19

Assisted Solution

by:compdigit44
compdigit44 earned 200 total points
ID: 39657932
To add onto the other experts comments the physical switch in-between you esxi host and storage must support 10GB in order to run at this speed

If you network can support 10GB iscsi then you shoudl most definentaly go with it.
0
 

Author Comment

by:sara2000
ID: 39683964
This is more in to education than break and fix. For an example I have 4*1GB nic cards in the server and i team all nic cards, this should give me 4GB. so the esxi can send 4 iscsi packets at one time , becuase there are 4 nic cards.
If I use single 10GB nic card , then it is possible that esxi host will have more iscsi sessions at one time hence more iscsi packets ?
0
 
LVL 119
ID: 39684025
Teaming 4 iSCSI network interfaces is not recommended.

4 x iSCSI NICs in Multipath is recommended, and 10GB iSCSI will be faster, if you really can generate that much traffic across the iSCSI storage to the SAN.
0
 
LVL 19

Accepted Solution

by:
compdigit44 earned 200 total points
ID: 39685538
Also your vSwitch nic team policy will also determine how utilized each of your NIC's will be in the team.

The following KB will explain in detail what I am referring to: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004088
0
 

Author Closing Comment

by:sara2000
ID: 39688443
Thank you all, it was good points
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
LINUX backups with VEEAM 8 81
Snapshot removal stuck at 99% 4 53
vCenter Server Health Check Alarm 3 20
Storage DRS Recommendation Alert 3 38
HOW TO: Connect to the VMware vSphere Hypervisor 6.5 (ESXi 6.5) using the vSphere (HTML5 Web) Host Client 6.5, and perform a simple configuration task of adding a new VMFS 6 datastore.
This article outlines why you need to choose a backup solution that protects your entire environment – including your VMware ESXi and Microsoft Hyper-V virtualization hosts – not just your virtual machines.
Teach the user how to use vSphere Update Manager to update the VMware Tools and virtual machine hardware version Open vSphere Client: Review manual processes for updating VMware Tools and virtual hardware versions: Create a new baseline group in vSp…
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question