[ngw] GW in Vm environment
James.Taylor at eastcobbgroup.com
Wed Jul 5 16:22:47 UTC 2017
If you are using virtual disks, then the hypervisor is controlling all of the i/o scheduling to the disks. If the guest os is also trying to schedule, then you are duplicating a lot of i/o within the guest environment.
I have only used this with citrix and vmware, but it is easy to test and does not require a reboot.
Here is one reference. There are number of others if you do a quick search.
james.taylor at eastcobbgroup.com
>>> "Stephen Hesser" <shesser at arandpartners.com> 7/5/2017 9:50 AM >>>
So you suggest setting the I/O Scheduler to NOOP, does this apply to all the different hypervisor's? We use KVM from Scale Computing here and I don't remember seeing this in any documentation for OES/SLES.
>>> "James Taylor" <James.Taylor at eastcobbgroup.com> 7/4/2017 2:51 PM >>>
Hi Thys -
A couple of items I'd recommend...
On virtual linux systems, OES or SLES, set the Global I/O scheduler to NOOP (no op). In a virtual environment you want the host vm to handle disk scheduling.
In yast, this is in System|Kernel Settings.
Also, you didn't mention it in your question, but I would recommend not running GW on OES, and if you do, don't run it on an NSS volume. I personal recommend Reiser on SLES11, and XFS on SLES 12. Others may have differing opinions.
james.taylor at eastcobbgroup.com
>>> "Thys de Beer" <Thys at nwpg.gov.za> 7/4/2017 3:58 AM >>>
Ok we have a new vce/dell vxrail setup, vsan the whole thing .. so now my first time for GW and oes/edir for that matter .. when i try to create here are some new questions (not had this before on my small esxi hosts before ..what do i select?for now gw2012, will upgrade to gw2014 once on new solution
A few questions on VM creations... vCentre vxrails ..... and this an All flash solution,,
For my normal OES/Linux boxes .. i know filr specify some these following questions but for my sles/oes/gw boxes what do i do?
1. Disks should i do "Independent" / "Independent -Persistent" or "Independent - Non-Persistent" .. sorry about this i just want to be sure .. heard horrible things about snaphosts and edir
2. Then also it talks about "Sharing"? ... "no=sharing" or "multi-writer" or " unspecified" this is all new.. remember this is in a vSAN all flash setup for storage..if it matters....
3. "Virtual flash read Cache"? .. do i enable? and how big do i make this? 4Gb 8GB 10 or nothing?..
Thys de Beer
NWPG Office of the Premier
Deputy Dir: Server Administration
018 388 3828
Novell -- CNE
Microsoft -- MCITP- Enterprise Administrator
Microsoft -- MCSE- Private Cloud
Vmware -- VCP5
"This e-mail and any files transmitted with it may contain information which is confidential, private or privilege in nature and it is for the sole use of the recipient to whom it is addressed. If you are not the intended recipient, you must immediately notify the sender via electronic mail and further refrain from reading, disseminating, distributing, copying or using this message or any of its transmitted files. Any views of this message and its transmitted files are those of the sender unless the sender specifically states such views to be those of the North-West Provincial Government. Though this message and its transmitted files have been swept for the presence of computer viruses, the North-West Provincial Government accepts no liability whatsoever for any loss, damage or expenses resulting directly or indirectly from the use or access of this message or any of its transmitted files."
ngw mailing list
ngw at ngwlist.com
More information about the ngw