Re: Remove datastore from one esxi host only
Spoke to VMware support and the solution was to open a vSphere Client directly to the ESXi host instead of the vCenter. Then unmount and detach every LUN on by one, then remove the host/datastore...
View ArticleSetup a non-redundant vm cluster with IBM 3512 SAN
Hello people! I have a small cluster of 3 hosts that i want to connect on a IBM 3512 SAN, with SAS cable. The SAN can have up to 4 SAS entry, so i cannot have redundant attachment as recommended by...
View ArticleRe: Optimizing NFS performance with vSphere 5.1 using Oracle Sun ZFS Appliance
Hi Nate, We use Nexenta with vSphere 5.1, but with 10GbE hosts as well.You probably should change the record size of your NFS volumes to 8 or 16 KB instead of 128KB if you need more IOPS instead of...
View ArticleRe: Remove datastore from one esxi host only
Hi, Did you apply this procedure with direct access to the host? Thanks for share with us, Regards
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Re: Optimizing NFS performance with vSphere 5.1 using Oracle Sun ZFS Appliance
Sounds pretty well setup. I agree with Dirk about the record size. We've found that 16k is a pretty good sweet spot as your I/O will be fairly random with your majority of VMs seem to be J2EE web...
View ArticleRe: Optimizing NFS performance with vSphere 5.1 using Oracle Sun ZFS Appliance
Thanks - it's great to get some real world feedback on the record size. I definitely want to lean towards higher IOPS vs. throughput. I've seen conflicting advice on the subject but I put greater stock...
View ArticleRe: Optimizing NFS performance with vSphere 5.1 using Oracle Sun ZFS Appliance
Thanks for this reply. 8k and 16k seemed a lot more reasonable to me than what we were using. It was actually someone on Oracle's forums who recommended the 128K record size (but they might not have...
View ArticleSSD datastore performance
Would like to get some info on whether or not there are ESXi specific tweaks to get better performance out of VMs sitting on an SSD datastore. Lab Setup:LSI 9260-8i RAID card8 x 500GB Samsung 830 SSDs...
View ArticleDeploy VSA on second LUN
I have two ESXi 5.1 hosts and am deploying VSA. Each host has two RAID LUNs-- a small 2-drive RAID-1 and a large 6-drive RAID-10. ESXi is installed on the RAID-1. When I run the wizard to deploy VSA on...
View ArticleIs there any impact if we Remove Dead Path...(force hba relogin on physical...
Dear Team, i have one ha enabled cluster , 2 esx 4.1 host is a member of the same. Once i click FC HBA adapters => Devices, i m able to see dead path entries of old luns which we have deleted from a...
View ArticleRe: Faults using Storage DRS in vSphere 5
Can someone clarify this issue? Emulate IDE is the default setting if Client Device is selected for VM. I have SDRS enabled datastores that wont migrate VMs and it appears that this may be the because...
View ArticleRe: SSD datastore performance
Hi, I have done quite a bit of work with SSD myself. SSD have a good use cases depending on the workload. Read VS Write and Random VS Sequential. You also need to look at the long term PE of the...
View Articleesxi 5.1 dell openmanage / lockdown mode
This is probably a really basic question, but I am new to this aspect of esxi, and cannot seem to find an answer. I am setting up a server (poweredge r515) running esxi 5.1 (free license). I access it...
View ArticleRe: Limiting IO per VM
jrocket wrote: Can I ask what the use case is for limiting the I/O? probably the vm is generating too many iops or saturating his NFS causing the other vms to have a high latency
View ArticleRe: Limiting IO per VM
We are trying to prevent a "noisy neighbor" VM from generating excessive IO that increases latency and negatively impacts the other VMs that share that datastore.
View ArticleRe: Limiting IO per VM
Have you looked into SIOC, which is explcitly designed to solve this noisy neighbour problem?
View ArticleRe: SSD datastore performance
Hi, Thanks for the reply. So in my scenario, I want all the VMs (various workloads) on this particular host to run on SSDs, no need for selective caching. Have run extensive benchmarks and both...
View ArticleRe: Limiting IO per VM
I was asking about the use can becase it sounded like the VM that needed the IOPS is just going to run slower and take longer. There is another way to adress the IOPS. You can do Server Side Cacheing...
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