Increasing the disk timeout values for a Linux 2.6 virtual machine (1009465)

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Jul 312011
 
Increasing the disk timeout values for a Linux 2.6 virtual machine (1009465)

· Inconsistent Linux operating system performance when disks are located on SAN-based datastores. · The Linux Guest operating system may experience intermittent issues when

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After migrating the host from ESX Classic to ESXi, ESXi reports the warning: Migrate: 456: Invalid message type for new connection: 542393671. Expecting message of type INIT (0) (2002969)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für After migrating the host from ESX Classic to ESXi, ESXi reports the warning: Migrate: 456: Invalid message type for new connection: 542393671. Expecting message of type INIT (0) (2002969)
Jul 312011
 
After migrating the host from ESX Classic to ESXi, ESXi reports the warning: Migrate: 456: Invalid message type for new connection: 542393671. Expecting message of type INIT (0) (2002969)

· You have recently migrated your host from ESX Classic to

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        Copyright © 2010 VMware, Inc. All rights reserved.

Generating a self-signed SSL certificate using the Java keytool command (2004193)

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Jul 312011
 
Generating a self-signed SSL certificate using the Java keytool command (2004193)

A certificate generated using the Java keytool command is compatible with products such as Apache Tomcat, vFabric tc Server and Eclipse Virgo and can be used to provide

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Installing the VMware View agent on a physical machine using the command line (2003129)

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Jul 312011
 
Installing the VMware View agent on a physical machine using the command line (2003129)

This article provides information on installaing the VMware View agent on a physical computer using the command line. The View Agent can be installed either in

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        Copyright © 2010 VMware, Inc. All rights reserved.

VMware View Administrator shows the virtual machine status error: Configuration Error (1039274)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für VMware View Administrator shows the virtual machine status error: Configuration Error (1039274)
Jul 312011
 
VMware View Administrator shows the virtual machine status error: Configuration Error (1039274)

· In View Administrator, the desktop reports the status error: Configuration Error · Entitled user is unable to connect to the desktop using PCoIP, but

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Installing View composer with an Oracle database fails (2000633)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für Installing View composer with an Oracle database fails (2000633)
Jul 312011
 
Installing View composer with an Oracle database fails (2000633)

When using an Oracle database to host the VMware View Composer database, you experience these symptoms:  · Cannot install View Composer · Installing View Composer fails · In the Event

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        Copyright © 2010 VMware, Inc. All rights reserved.

Top 5 Planet V12N blog posts for week 30

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Jul 302011
 
Top 5 Planet V12N blog posts for week 30

Great to see this past week a lot of the vExperts gave a shout out to John Troyer for his birthday.  For those of you that don’t know him, John Troyer is a VMware employee that leads a lot of the social media activities for VMware and the community.  He is also responsible for maintaining this site, and recruited me to help out in highlighting some of the top blog posts every week.  It wasn’t so much his birthday but an official “thanks for all you do for the VMware community”. 

I second that notion in tipping my hat in honor of Mr. Troyer.  For all your valiant efforts, hours of community podcasts, devotion to Twitter, leading the vExpert program, acting as the catalyst for the VMware community, and in general making this a fun experience.  Thanks John!

image

 

Ok on with this weeks top 5!

Gabrie van Zanten - vSphere 5 – How to run ESXi stateless with vSphere Auto Deploy - A great new feature of vSphere 5 is the possibility to run ESXi stateless. Long, long time ago when ESX 3.0 was hip, we would all install ESX on the local harddisk (or SAN disk). With ESX 3.5, the first ESXi version was released but only few were using it. With 4.x ESXi really got a large install base and more and more people were moving to installing ESXi on USB or SD card. Now with vSphere 5 and ESXi as the only hypervisor (no more ESX), we don’t need to install ESXi at all.

William Lam - New vSphere Health Check 5.0 & ghettoVCB Script - The vSphere Health Check script has now been updated to support vSphere 5.0 and includes the following new features, vCenter Server Instance UUID, vCenter hostname, Storage DRS Configuration (Maintenance Mode, Stats Aggregation, Stats Collection for Datastores), FDM/HA Heartbeat Policy + Datastore, FDM/HA State, Host Agent Settings, Host New iSCSI Configuration/Information…

Eric Sloof - vSphere 5 Video - Storage DRS - So what’s the fuzz about this new vSphere 5 Storage DRS feature? This feature delivers the DRS benefits of resource aggregation, automated initial placement, and bottleneck avoidance to storage. You can group and manage similar datastores as a single load-balanced storage resource called a datastore cluster. Storage DRS makes VMDK placement and migration recommendations to avoid I/O and space utilization bottlenecks on the datastores in the cluster.

Chad Sakac - Even MORE reasons to run Oracle on VMware - If I told you that I could do something to make your most mission critical app, perform better, cost less, have higher overall availaiblity, you would either: A) assume I’m a vendor trying to sell you something and write it off as such; b) assume I’ve made an error – and ignore my advice; c) investigate, and if you agree, you would consider that deployment model for the app.  Or, you’d be a person who likes “just keep it the way it is” SO much that you are willing to pay more, for less performance, and suffer more downtime.  

Vladan Seget - VMware vSphere 5 performance enhancements whitepaper - After reading this whitepaper, I really started to like some of the new features introduced in vSphere 5. Besides the CPU enhancements which can now scale up to 32 vCPU per VM, which I will implement less likely immediately, or the possibility to configure 1TB of vMem in one single VM, the paper discuss the interesting SSD Swap Cache, which is new feature in ESXi 5.0 and which permits to configure the redirection of those swapped-out memory pages rather on SSD local drive instead of SATA/SAS.

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        Copyright © 2010 VMware, Inc. All rights reserved.

Top 10 Reasons to Attend VMworld

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Jul 292011
 
Top 10 Reasons to Attend VMworld

If you haven’t yet registered for VMworld 2011, do it today as hotel rooms are selling out quickly and airfare won’t drop significantly in the near future. VMworld is THE place to learn about the hottest virtualization and cloud computing technologies and get a sneak peek of what is coming up next.

 

Here are Top 10 reasons why you won’t want to miss VMworld 2011.

 

1. Dive deep into VMware vSphere.
Get the latest updates to the best platform for building cloud infrastructures with Sessions and Labs dedicated to vSphere 5.0.

 

2. Get a grip on cloud computing.
Learn what cloud computing is all about, including how to use it to reduce IT complexity and enable IT as a service.

 

3. Arm yourself with knowledge.
Choose from more than 175 unique Breakout Sessions led by subject-matter experts.

 

4. Get your hands dirty.
Explore how virtualization can make a powerful impact on your organization by choosing from Hands-on Labs covering over 20 topics.

 

5. Hear from the top in General Sessions.
VMware’s Paul Maritz, Chief Executive Officer, and Dr. Stephen Herrod, Chief Technology Officer and Senior Vice President of R&D, present VMware’s vision for IT as a Service.

 

6. Participate in the ultimate show-and-share.
With more than 250 exhibitors, the Solutions Exchange is the perfect place to network, learn and explore the latest virtualization and cloud infrastructure products, services and solutions.

 

7. Stay in the know.
Be one of the first to hear exciting announcements from VMware. We've got some great ones coming up that you don't want to miss.

 

8. Pick the brain of an expert.
Hear subject-matter experts present in Sessions, lead Group Discussions and then meet them one-on-one to cover topics that relate specifically to your organization.

 

9. Network, network, network.
Meet, connect, and share your experiences with virtualization and cloud computing with peers from around the world and across your industry.

 

10. Revel in your "developerness".
If you're a developer building and delivering solutions on VMware platforms, the Technology Exchange for Alliance Partners is the premier event for you.

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        Copyright © 2010 VMware, Inc. All rights reserved.

Analysis of Storage Technologies on Clusters using VMmark 2.1

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für Analysis of Storage Technologies on Clusters using VMmark 2.1
Jul 292011
 
Analysis of Storage Technologies on Clusters using VMmark 2.1

Previous blog entries utilizing VMmark 2.1 introduced the benchmark, showed the effects of generational scaling, and evaluated the scale-out performance of vSphere clusters.  This article analyzes the performance impact of the type of storage infrastructure used, specifically when comparing the effects of Enterprise Flash Drives (EFDs; often referred to as SSDs) versus traditional SCSI HDDs.  There is a general perception, both in the consumer and business space, that EFDs are better than HDDs.  Less clear, however, is how much better and whether the performance benefits of the typically more expensive EFDs are observed in today’s more complex datacenters. 

VMmark 2 Overview:

Once again we used VMmark2.1 to model the performance characteristics of a multi-host heterogeneous virtualization environment.  VMmark 2.1 is a combination of application workloads and infrastructure operations running simultaneously.  In general, the infrastructure operations increase with the number of hosts in an N/2 fashion, where N is the number of hosts.  To calculate the score for VMmark 2.1, final results are generated from a weighted average of the two kinds of workloads; hence scores will not increase linearly as workload tiles are added.  For more general information on VMmark 2.1, including the application and infrastructure workload details, take a look at the expanded overview in my previous blog post or the VMmark 2.1 release notification written by Bruce Herndon.

Environment Configuration:

  • Systems Under Test: 2 HP ProLiant DL380 G6
  • CPUs: 2 Quad-Core Intel® Xeon® CPU 5570 @ 2.93 GHz with Hyper-Threading enabled per system
  • Memory: 96GB DDR2 Reg ECC per system
  • Storage Arrays Under Test:
    • HDD: EMC CX3-80
      • 8 Enclosures: RAID0 LUNs, 133.68GB FC HDDs
    • EFD: EMC CX4-960
      • 4 Enclosures: RAID0 LUNs, mix of 66.64GB and 366.8GB FC EFDs
  • Hypervisor: VMware ESX 4.1
  • Virtualization Management: VMware vCenter Server 4.1

Testing Methodology:

To analyze the comparative performance of EFDs versus HDDs with VMmark 2.1, a vSphere DRS enabled cluster consisting of two identically-configured HP ProLiant DL380 servers was connected to the two EMC storage arrays.  A series of tests were then conducted against the cluster with the same VMs being moved to the storage array under test, increasing the number of tiles until the cluster approached saturation.  Saturation was defined as the point where the cluster was unable to meet the minimum quality-of-service (QoS) requirements for VMmark 2.1.  The minimum configuration for VMmark 2.1 is a two-host cluster running a single tile.  The result from this minimal configuration on the HDD storage array was used as the baseline, and all VMmark 2.1 data in this article were normalized to that result.  In addition to the standard VMmark 2.1 results, esxtop data was also collected during the measurement phase of the benchmark to provide additional statistics. 

Results:

In a top-down approach to reviewing the two storage technologies, it seems natural that the first point of comparison would be the overall performance of VMmark 2.1.  By comparing the normalized scores, it’s possible to immediately see the impact of running our cluster on EFDs versus traditional HDDs at a variety of load levels.

    P1


Click to Enlarge

The improvement in score is apparent at every point of utilization, from the lowest-loaded 1-tile configuration out to the saturation point of 6 tiles.  Overall, the average improvement in score for the EFD configuration was 25.4%.  And while the HDD configuration was unable to meet the QoS requirements at 6 tiles, the EFD configuration not only met the requirements, but also improved the overall VMmark 2.1 score, even when the cluster was completely saturated (as seen in the graph below).  VMmark 2.1 can drive a considerable amount of I/O, up to many thousands of IOPS for large numbers of tiles.  Digging deeper into the root cause of such dramatic improvement for EFDs led me to investigate the overall throughputs for each of the configurations. 

    P2


Click to Enlarge

It’s apparent from the above graph that there was significant improvement in the total bandwidth, represented by Total MB/s, in the EFD configurations.  Compared to the HDD configuration, the EFD configuration’s total throughput improved (8%, 9.2%, 9.5%, 6.5%, and 14.5%, respectively). The amount of improvement actually increased as the I/O demands on the cluster increased.  Another interesting detail that arose from reviewing the data over numerous points of utilization was that %CPU used on the EFD configuration was typically higher than its HDD counterpart at the same load.  Although slightly counter-intuitive at first, it makes sense that if the system is waiting less for I/Os to complete, it can spend more time doing actual work as demonstrated by the higher VMmark 2.1 scores.  This observation leads to another interesting comparison.  Disk latency characteristics are often used to predict hardware performance. This can be useful, but what can be unclear is how this translates to real-world disk latencies running a diverse set of workloads. 

     P3aP3b 

Lower is Better:Click to Enlarge

Above is a series of graphs that display the average latency reported per write and read I/Os (note that lower latency is better).  In looking at each of the key latency counters we can get a better sense for where the additional performance is derived.  There’s a generalization that EFDs have poor write speeds by comparison to today’s HDDs.  The results here show that the generalization doesn’t always apply.  In fact, when looking at the average write latency for the tested EFDs across all data points, it was within 1% of the average write latency for the tested HDDs.  Additionally, reviewing the read latency comparison data showed massive reductions in latency across all workload levels, 76% on average.  Depending on the workload being run, this in itself could be all the justification needed to move to the newer technology.

It isn’t surprising that EFDs outperformed HDDs.  What is somewhat unexpected is the amount of performance, and the ability for EFDs to show immediate advantages even on the most lightly loaded clusters. With an average VMmark 2.1 score improvement of 25.4%, an average bandwidth increase of 9.6%, and a combined average read latency reduction of 76%, it’s easy to imagine there are a great many environments that might benefit from the real-world performance of EFDs. 

 

 

 

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Unable to save office docs through sharepoint when using virtualized Internet Explorer (2003722)

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Jul 292011
 
Unable to save office docs through sharepoint when using virtualized Internet Explorer (2003722)

When you use a virtualized ThinApp Internet Explorer to access a Microsoft Sharepoint site, and you attempt to edit a document, you may experience these

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        Copyright © 2010 VMware, Inc. All rights reserved.

Auto-connecting a USB device to a virtual machine fails with the error: failed: 17 (2000350)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für Auto-connecting a USB device to a virtual machine fails with the error: failed: 17 (2000350)
Jul 292011
 
Auto-connecting a USB device to a virtual machine fails with the error: failed: 17 (2000350)

· A USB device connects and then disconnects · A USB device does not stay connected · Passing a HID device using the autoconnect command fails. · You are

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        Copyright © 2010 VMware, Inc. All rights reserved.

ESX host shows a purple diagnostic screen and the error: Unable to handle kernel NULL pointer dereference at virtual address 00000004 (2004208)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für ESX host shows a purple diagnostic screen and the error: Unable to handle kernel NULL pointer dereference at virtual address 00000004 (2004208)
Jul 292011
 
ESX host shows a purple diagnostic screen and the error: Unable to handle kernel NULL pointer dereference at virtual address 00000004 (2004208)

· An ESX host crashes and displays a purple diagnostic screen with the following information: Unable to

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        Copyright © 2010 VMware, Inc. All rights reserved.

Troubleshooting migration compatibility warning: Reverting to snapshot would generate error (warnings) on the destination host (1003800)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für Troubleshooting migration compatibility warning: Reverting to snapshot would generate error (warnings) on the destination host (1003800)
Jul 292011
 
Troubleshooting migration compatibility warning: Reverting to snapshot would generate error (warnings) on the destination host (1003800)

When performing a VMotion migration, the following compatibility warning is displayed: Migration from

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        Copyright © 2010 VMware, Inc. All rights reserved.

Cannot extend a vmdk over 1TB (1008528)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für Cannot extend a vmdk over 1TB (1008528)
Jul 292011
 
Cannot extend a vmdk over 1TB (1008528)

Cannot increase the size of  a virtual disk on an ESX/ESXi 3.x host beyond 1024GB. When extending a vmdk over 1TB (1024 GB), on an ESX/ESXi 3.x host using the Virtual Infrastructure (VI) Client, these errors

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Connecting to or checking out the virtual desktop fails with the error: This desktop currently has no desktop sources available or This desktop cannot be checked out (1027221)

 Allgemein, Knowledge Base, Updates, VMware, VMware Partner, VMware Virtual Infrastructure, vSphere  Kommentare deaktiviert für Connecting to or checking out the virtual desktop fails with the error: This desktop currently has no desktop sources available or This desktop cannot be checked out (1027221)
Jul 292011
 
Connecting to or checking out the virtual desktop fails with the error: This desktop currently has no desktop sources available or This desktop cannot be checked out (1027221)

You experience one or more of these symptoms: · Connecting to the virtual

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