Impact of lost storage connection
I have servers with only 1 Fibre channel HBA. If that 2-port HBA adapter fails, all VMs on the server lose connectivity to storage. How can I estimate the risk of data loss that might occur if a VM...
View ArticleRe: What is wrong with my infrastructure ?
Hi there, I have similar problems, but am using IBM X3755 M3 4 socket servers, Citrix Xenserver, Cisco MDS 9148 and Netapp FAS 2240-2 in active active controller.I have another Xenserver in the lab...
View ArticleRe: How does multipathing work?
I had a chance to flip thru my EMC text (Information Storage and Management, 2009 edition). In its chapter on Intelligent Storage Systems, it talks about A-A and A-P arrays by using the Clarion and...
View ArticleVAAI - What Am I Getting... and what am I missing?
So I'm running vSphere 5.5, and my datastores reside on an HP 3PAR 7200, using 10Gb iSCSI. In order to reclaim space on my thinly provisioned volumes, I run "esxcli storage vmfs unmap -l <name>"....
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Re: VAAI - What Am I Getting... and what am I missing?
Hi theire, If i'am right normally it's included in Compare vSphere Editions: Server Virtualization &amp; Cloud Infrastructure | United States (Enterprise) But what do you get on the...
View ArticleRe: VAAI - What Am I Getting... and what am I missing?
It definitely shows supported on all my LUNs. Again, I've got a 3PAR 7200 that has the VAAI "plugin" already integrated into its OS, and all my Virtual Volumes are thin provisioned. The question is......
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Re: VAAI - What Am I Getting... and what am I missing?
i think instead of "off-loading" it you're Host Ressources will be used beeing able having the VAAI to get working. only Point which is explaining it to me. So would mean at the end that the...
View ArticleRe: Add FC Storage via FC 16G switch into VMmark 2.51 encounter one failed issue
Thanks for your help. I also found old VMFS in FC Storage if want to add to New vCenter have to select to new signature options.
View ArticleRe: 3PAR Peer Persistence (Metro Storage Cluster) needs reboot ?
I'm having similar issues with 3PAR StoreServ 7400. I only experienced the problem with 1 host out of 10 most recently, however. All of the 9 working hosts enumerated the paths as...
View ArticleRe: Impact of lost storage connection
VMinator, I am sorry to say that you will not be able to predict the exact amount of data loss in bytes or in number of WRITE IO commands. It depends on the number of outstanding WRITE commands at the...
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Re: windows 2012 continuous availability nfs server a viably option?
Hi! Thank you for considering StarWind product. With StarWind you have two options:The scenario that you`ve mentioned, when StarWind is installed on the WS hardware boxes. If the budget is the problem...
View ArticleShared hard drive in guest VMs
Hi, I have absolutely no background in VMware technologies, so please bear with me. I'm just a user of a shared service inside the company where I work. We have quite a few Linux boxes on which build...
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Re: Shared hard drive in guest VMs
We had a NFS share first, but the NFS files-system creates temporary hidden files like ".nfs0123123 " by which our build jobs got confused. When there is an inventory process running, getting a list of...
View ArticleRe: Shared hard drive in guest VMs
Hi, welcome to the communities, you shouldn't mount a single virtual disk to multiple VMs, as the filesystem inside the disk is probably not made for multi access. I would go with a NFS share, as it's...
View ArticleRe: Shared hard drive in guest VMs
Well, it's available on VMware side. VMware uses VMFS so that multiple hosts can access the the same datastore. Your problem is not on VMware side, but on client side, as the Filesystem inside the VM...
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Re: Shared hard drive in guest VMs
We did not analyze the failures when an error occurred with the temporary .nfsXXXXXXXXXX files, but it happened from time to time. The solution was to switch to Samba So the baseline of what you are...
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Re: Shared hard drive in guest VMs
Correct, there's no easy way to share a RW disk across multiple VMs. And no, I don't think VMware will or can add such a feature, as it's not VMware's problem. It's the filesystem inside the guest OS...
View ArticleRe: Shared hard drive in guest VMs
Hi, Did you explore the multi-writer option for VMFS? This allows a virtual disk to be shared by multiple VMs, check VMware KB VMware KB: Disabling simultaneous write protection provided by VMFS using...
View ArticleRe: Shared hard drive in guest VMs
Arun Pandey that won't fix the problem though, as you still need cluster-aware applications. If you just mount this vmdk to multiple linux boxes, the VMs all can write to the ext3/ext4 filesystem, but...
View ArticleRe: Shared hard drive in guest VMs
The build jobs are separated like this /export/workspaces Mount point of shared disk/export/workspaces/workspace1 <- VM1 writes to this folder tree/export/workspaces/workspace2 <- VM2 writes to...
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