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AHV Virtualization

Webscale Virtualization for the Enterprise

  • 635 Topics
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635 Topics
joshodgers
Nutanix Employee
joshodgersNutanix Employee
posted in AHV Virtualization
VMware Storage DRS (SDRS)

Storage DRS is a feature of vSphere 5.0 onwards which aims to reduce the complexity of managing storage capacity and performance for virtual machines running on traditional shared storage. SDRS helps simplify management of Datastores (LUNs / NFS Mounts) by analyzing the available datastores capacity and placing new virtual machines in datastores with the required available capacity. This is called "Initial Placement". SDRS also allows administrators to create rules ([b]"Affinity" & "Anti-Affinity")[/b] to ensure specific what VMs should be kept together or apart for performance / capacity reasons and finally, monitor I/O metrics and relocate VMs to different datastores where contention or capacity constraints exist. As it is recommended to have one Large NFS Datastore in a Nutanix environment, the issue of initial placement (which SDRS helps resolve) is natively eliminated as all Virtual machines, regardless of performance or capacity requirements can and should be placed into one

0
joshodgers
Nutanix Employee
9 years ago
joshodgers
Nutanix Employee
joshodgersNutanix Employee
posted in AHV Virtualization
VMware Network I/O Control (NIOC)

Network I/O control is a feature available since vSphere 4.1 with the Virtual Distributed Switch (VDS) which uses Network resource pools determine the bandwidth that different network traffic types are given. When network I/O control is enabled, distributed switch traffic is divided into Customer Network Resource pools and/or the following predefined network resource pools: Fault Tolerance traffic, iSCSI traffic, vMotion traffic, management traffic, vSphere Replication (VR) traffic, NFS traffic, and virtual machine traffic. From vSphere 5.0 onwards, you can also create custom network resource pools for virtual machine traffic. You can control the bandwidth each network resource pool is given by setting the physical adapter shares and host limit for each network resource pool. The physical adapter shares assigned to a network resource pool determine what share of the total available bandwidth will be guaranteed to the traffic associated with that network resource pool in the event o

0
joshodgers
Nutanix Employee
9 years ago
joshodgers
Nutanix Employee
joshodgersNutanix Employee
posted in AHV Virtualization
VMware Storage I/O Control (SIOC)

The following tables show the recommended configuration of VMware Storage I/O Control (SIOC). [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/264i74FC812702A61EE4.jpg[/img]

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joshodgers
Nutanix Employee
9 years ago
joshodgers
Nutanix Employee
joshodgersNutanix Employee
posted in AHV Virtualization
Best Practices for VMware Distributed Resource Scheduler (DRS)

The following tables show the recommended configuration of VMware Distributed Resource Scheduler (DRS). [b]DRS (General)[/b] [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/258iC0B64EA0AB05913D.jpg[/img] [b]DRS Rules[/b] [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/260iC36A3829678786A2.jpg[/img] [b]DRS Distributed Power Management (DPM)[/b] [b][img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/262i30C4C439D67776FB.jpg[/img][/b]

0
joshodgers
Nutanix Employee
9 years ago
R
rsciaraffoAdventurer
posted in AHV Virtualization
Microsoft Exchange Server

Is anyone running Microsoft Exchange on their Nutanix cluster? If so, approximately how many mailbox databases (EDBs) are you running and what is the approximate size of each? Also, overall feedback/thoughts of the performance of your Exchange environment on the Nutanix cluster?

8
joshodgers
Nutanix Employee
9 years ago
T
tenKeAdventurer
posted in AHV Virtualization
IOPS&Latency issue

Hello mates, We have 2x NX3350 and Arista switch which handle roughly 100 VM. Workloads are: 20x VM with heavy disk workload which are used mainly for reporting and analysis. R/W ratio is roughly 50/50. They created 20K IOPS workload when they lived on SAN storage with RAID10 and tiny flash tier and average latency was always below 5 ms. 10x VM which are used for application virtualization 70x VM which are use for desktop virtualization. Now, when we migrated to Nutanix, we have only 4K cluster IOPS and 20 ms latency which does not seems to be very good for us. Trying to resolve the issue, we enabled inline compression and increased CVM memory up to 20GB. We also tried to change tier sequential write priority. Unfortunately, this does not help. ncc, cluster status and prism health claim that everything is ok. Before we migrated our environment, we've run diagnostic VM and the results was roughly 100K IOPS for read. Here is the current configuration of cluster:NOS Version: 4

11
T
9 years ago
J
jgrinwisVoyager
posted in AHV Virtualization
fdm and pynfs

When we want to reconfigure for HA, installation of the fdm always fails with the following error: syslog.log:2014-09-10T07:34:33Z fdm-installer: VIB Nutanix_bootbank_pynfs_5.0.0-0.0.1 violates extensibility rule checks: [u'(line 22: col 0) Element vib failed to validate content'] We need to remove pynfs, reconfigure for HA and then we can re-install pynfs again. Is there a workaround in stead of keep on removing and reinstalling pynfs? Regards John Grinwis

3
dlink7
10 years ago
K
kiboroAdventurer
asked in AHV Virtualization
Can someone from Nutanix comment on this security issue with libvirt?

I know this is a Mandriva notice but I assume CentOS is also affected. _______________________________________________________________________ Mandriva Linux Security Advisory MDVSA-2014:097 http://www.mandriva.com/en/support/security/ _______________________________________________________________________ Package : libvirt Date : May 16, 2014 Affected: Business Server 1.0 _______________________________________________________________________ Problem Description: Multiple vulnerabilities has been discovered and corrected in libvirt: The LXC driver (lxc/lxc_driver.c) in libvirt 1.0.1 through 1.2.1 allows local users to (1) delete arbitrary host devices via the virDomainDeviceDettach API and a symlink attack on /dev in the container; (2) create arbitrary nodes (mknod) via the virDomainDeviceAttach API and a symlink attack on /dev in the container; and cause a denial of service (shutdown or reboot host OS) via the (3) virDomainShutdown or (4) virDomainReboot API and a symlink attack on /

1
shuguet
10 years ago
shuguet
shuguetTrailblazer
posted in AHV Virtualization
Official support date for vSphere 5.5/5.5U1

Hello everyone, Does anyone have an official date for the support of vSphere 5.5? And with 5.5 update 1 right around the corner (next month or so), do you now if the U1 version will be supported on the release date or will we need to wait some more? For what it's worth, our block is running fine in 5.5 since ~1month (although unsupported by Nutanix, we updated it with VUM without problem). Thanks in advance for you answers, Sylvain.

2
M
10 years ago
mluksch
mlukschAdventurer
posted in AHV Virtualization
KVM iSCSI vs. NFS

Can someone enlighten me, why KVM uses iSCSI-LUNs and not the NFS exported container like it is done with vSphere/ESX? Currently, I only see disadvantages, like cumbersome handling of VMs, and no benefits.

2
shuguet
10 years ago

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