Tag: virtual san Page 1 of 2

vSAN Adaptive Resync, what does it do?

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I am starting to get some more questions about vSAN Adaptive Resync lately. This was introduced a while back, but is also available in the latest versions of vSAN through vSphere 6.5 Patch 02. As a …

Where is the vSAN storage performance proactive test in vSphere 6.5 U1 patch 02?

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I had some customers asking where the storage performance proactive test and the multicast proactive test was in the latest release of vSAN. In the past this is what the UI looked like when they would …

Can I use a custom TCP/IP stack for the vSAN Network?

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I got this question today if you can use a custom TCP/IP stack for the vSAN Network, and I had this before. This question is usually asked by customers who have a stretched cluster as the …

Holiday gift: vSAN Essentials book available for free

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Christmas is coming so Cormac and I figured we would do something special for everyone, after a long debate we decided to make the vSAN Essentials book available for free. Note that this is the “Essential …

Using HA VM Component Protection in a mixed environment

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I have some customers who are running both traditional storage and vSAN in the same environment. As most of you are aware, vSAN and VMCP do not go together at this point. So what does that …

Sharing the #TechConfessions video

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At VMworld I sat down with Amy Lewis and had my Tech Confession. Where/When/How did I have my Software Defined  world.

I would also highly recommend the tech confession by William Lam and Alan Renouf, …

Isolation Address in a 2-node direct connect vSAN environment?

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As most of you know by now, when vSAN is enabled vSphere HA uses the vSAN network for heartbeating. I recently wrote an article about the isolation address and relationship with heartbeat datastores. In the …

vSphere HA heartbeat datastores, the isolation address and vSAN

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I’ve written about vSAN and vSphere HA various times, but I don’t think this has been explicitly called out before. Cormac and I were doing some tests this week and noticed something. When we were looking …

What is the overhead for Swap in a stretched cluster?

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Last week internally we had a debate about the overhead of a swap file in a stretched cluster. With the ability to have a double protection (across site and within a site) the question was what …

Which disk controller to use for vSAN

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I have many customers going through the plan and design phase for implementing a vSAN based infrastructure. Many of them have conversations with OEMs and this typically results in a set of recommendations in terms of …

VMworld vSAN Sessions Playlist

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I just created a simple playlist up on youtube which has most (if not all) vSAN sessions on there. If you are interested in vSAN simply have a look at the playlist and pick what you …

Sharing the “Top 10 things to know about vSAN” slides…

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I was asked by a few people to share the slides for our Top 10 vSAN session at VMworld. Instead of sending the slides around via email I figured I would simply throw it up on …

Watch VMworld session “Top 10 Things to Know about vSAN #STO1264BE” for free …

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I didn’t know, but apparently our session was a featured session at VMworld Europe. For those interested in our VMworld: Top 10 vSAN session there’s a “mini player” below of our European VMworld session. I somehow …

#vmworld #STO1770BU – Tech Preview of Integrated Data Protection for vSAN

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This session was hosted by Michael Ng and Shobhan Lakkapragada and is all about Data Protection in the world of vSAN. Note that this was also a tech preview and features may or may not ever …

#VMworld #STO1378 – vSAN Management Today and in the Future

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#STO1378 “vSAN Management Today and in the Future” by Junchi Zhang and Christian Dickmann. Christian did this session by himself last year, and it was one of the coolest sessions of last year, so the expectations …

#VMworld #STO1794BU – Evolution of vSAN

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First session of the day at 08:30: “The Evolution of vSAN”. Vijay Ramachandran and Christos Karamanolis will be talking where vSAN came from and where it will be going towards in the upcoming years. Vijay started …

#STO1490BU : vSAN Vision – The Future of HCI

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I am not able to attend many sessions, but wanted to add this one to my schedule. This session was hosted by Lee Caswell (VP Products Storage and Availability VMware), Christos Karamanolis (CTO Storage and Availability …

vSAN 6.6.1 Performance Diagnostics Demo

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I was playing in my lab this morning and figured I would record a demo of a new feature which is part of vSAN 6.6.1. The Performance Diagnostics feature is aimed to help those running benchmarks …

Unbalanced Stretched vSAN Cluster

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I had this question a couple of times the past month so I figured I would write a quick post. The question that was asked is: Can I have an unbalanced stretched cluster? In other words: …

vSphere 6.5 U1 is out… and it comes with vSAN 6.6.1

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vSphere 6.5 U1 was released last night. It has some cool new functionality in there as part of vSAN 6.6.1 (I can’t wait for vSAN 6.6.6 to ship ;-)). There are a lot of fixes of …

VMkernel Observations (VOBs)

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I never really looked at VOBs but as this came up last week during a customer meeting I decided to look in to it a bit. I hadn’t realized there was such a large number of …

Sizing a vSAN Stretched Cluster

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I have had this question a couple of times already, how many hosts do I need per site when the Primary FTT is set to 1 and the Secondary FTT is set to 1 and RAID-5 …

vSAN 6.6 Stretched Cluster Demo

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I had one more demo to finish and share and that is the vSAN 6.6 stretched cluster demo. I already did a stretched clustering demo when we initially released it, but with the enhanced functionality around …

vSAN 6.6 Demo: Configuration Assist

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I just noticed I still had a demo recoding on my desktop from a couple of weeks ago. The topic is vSAN 6.6 configuration assist. Hadn’t done anything with it, so I just added the narratives …

Change multicast address when running multiple vSAN clusters in same VLAN

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Before vSAN 6.6 we would always recommend to change the multicast address when running multiple vSAN clusters in the same VLAN. Now that with vSAN 6.6 we removed multicast, does this best practice/recommendation still apply? I …

vSAN 6.6: Manual vs Automatic Disk Claim Mode

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I received this question on Manual vs Automatic disk claim mode in vSAN 6.6. Someone upgraded a cluster from 6.2 to 6.6 and  wanted to add a second cluster. They noticed that during the creation of …

Can I front vSAN with a VAIO Caching Solution?

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I had this question a couple of times already, so I figured I would write a quick post. In short: yes you can put a VAIO Filter in front of vSAN. The question really is, which …

vSAN Health Check fails on vMotion

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On Slack someone asked why the vMotion check for vSAN 6.6 Health Check was failing constantly. It was easy to reproduce when using the vMotion IP Stack on your vMotion VMkernel interface. I went ahead and …

Disk format change going from 6.x to vSAN 6.6?

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Internally I received a comment around the upgrade to 6.6 and the disk format version change. When you upgrade to 6.6 also the version of  disk changes, it goes to version 5. In the past with …

Where to find the Host Client vSAN section?

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I had a couple of people asking already, so I figured I would do a short post on where to find the ESXi Host Client vSAN section. It is fairly straight forward, if you know where …

VMware vSAN 6.6 demo: vSAN Encryption

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Yesterday I posted a quick video overview of a couple new features that are part of vSAN 6.6. (haven’t seen it, go watch that one first!) I mentioned in that demo that I would potentially …

What’s new for vSAN 6.6?

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Yes this may confuse you a bit, a new vSAN release namely vSAN 6.6 but it doesn’t coincide with a vSphere release. That is right, this is a “patch” release for vSphere but a major version …

vSAN needs 3 fault domains

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I have been having discussions with various customers about all sorts of highly available vSAN environments. Now that vSAN has been available for a couple of years customers are starting to become more and more comfortable …

Intel Optane support for vSAN, first HCI solution to deliver it

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I am in Australia this week for the Sydney and Melbourne VMUG UserCon’s. Had a bunch of meetings yesterday and this morning the news was dropped that Intel Optane support was released for vSAN. The performance …

Running a Witness Appliance on a 2 Node vSAN config with FT

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I have had various people asking, and to me it felt like an obvious answer, but as multiple have asked over the past couple of month I figured I would dedicate a post to it. The …

vSAN 6.x customer? vSphere 6.0 Update 3 is out

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Are you a vSAN 6.x customer? vSphere 6.0 Update 3 is out! There are a bunch of important fixes and improvements (checksumming performance for instance) in Update 3, so I would highly recommend looking in to …

Virtually Speaking Podcast – vSAN Customer Use Cases

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As John Nicholson was traveling in and around New Zealand I was asked by Pete if I could co-host the Virtually Speaking Podcast again. It is always entertaining to join, Pete is such a natural when …

Lucky 7k, go vSAN!

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VMware announced the Q4 earnings last night, one of the things I was most interested about was how vSAN did in Q4. Here is what was announced yesterday, for those interested in more detail check the

XenDesktop/XenApp 7.12 MCS works with vSAN

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This is something that has kept me busy for a while. For the past 2 years there were some challenges with regards to the use of MCS and XenDesktop/XenApp in combination with vSAN. In fact, Citrix …

Two host stretched vSAN cluster with Standard license?

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I was asked today if it was possible to create a 2 host stretched cluster using a vSAN Standard license or a ROBO Standard license. First of all, from a licensing point of view the EULA

Can you run all-flash with vSAN 6.2 Standard license?

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As I get the following question a lot I figured I would share the answer here as well: Can you run all-flash with vSAN 6.2 Standard license? Many of you have seen the change in licensing …

New vSAN Management Pack for VROps

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I just wanted to add this pointer, if you are a vSAN and VROps customer then it is good to know that there is a new pack for vSAN. You need to be running vSAN 6.2 …

Disk controllers for vSAN with or without cache?

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I got this question today and I thought I already wrote something on the topic, but as I cannot find anything I figured I would write up something quick. The question was if a disk controller …

Storage capacity for swap files and TPS disabled

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A while ago (2014) I wrote an article on TPS being disabled by default in future release. (Read KB 2080735 and 2097593 for more info) I described why VMware made this change from a security perspective …

All-Flash HCI is taking over fast…

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Two weeks ago I tweeted about All-Flash HCI taking over fast, maybe I should have said All-Flash vSAN as I am not sure every vendor is seeing the same trend. Reason for it being of course …

Benchmarking an HCI solution with legacy tools

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I was driving back home from Germany on the autobahn this week when thinking about 5-6 conversations I have had the past couple of weeks about performance tests for HCI systems. (Hence the pic on the …

The difference between VM Encryption in vSphere 6.5 and vSAN encryption

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More and more people are starting to ask me what the difference is between VMCrypt aka VM Encryption and the beta feature we announced not to long ago called vSAN Encryption. (Note, we announced a beta, …

Virtual SAN >> vSAN, and grown to 5500 customers!

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Not that it is a big deal, but as some people are like me they probably prefer to use the right name. As of this week Virtual SAN was renamed to vSAN. I am not sure …

What is new for Virtual SAN 6.5?

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As most of you have seen by the explosion of tweets, Virtual SAN 6.5 was just announced. Some may wonder how 6.5 can be announced so fast after the Beta Announcement, well this is not …

Hyper-Converged is here, but what is next?

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Last week I was talking to a customer and they posed some interesting questions. What excites me in IT (why I work for VMware) and what is next for hyper-converged? I thought they were interesting questions …

Running your VSAN witness for a 2 node cluster on a 2 node cluster

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A week ago we had a discussion on twitter about a scenario which was talked about at VMworld. The scenario is one where you have two 2-node clusters and for each 2-node cluster the required Witness …

Want to print your own VVol or VSAN shirts/stickers?

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I’ve been getting more and more questions from folks who want to print their own VSAN shirts and stickers. I cannot share all designs, but some of them I can so I figured I would. For …

Sharing VMworld slides

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I know the VMworld team will share them as well over time, but I figured I would do the same thing through my blog. Here are two decks. First deck is the deck for “VMworld – …

Taking VSAN to the next level, join the VSAN beta!

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In 2013 VSAN saw the day of light, the beta was released. Now 3 years later you have the opportunity to once again sign up and help improve our product. Over the last couple of years …

An Industry Roadmap: From storage to data management #STO7903 by @xtosk

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This is the session I have been waiting for, I had it very high on my “must see” list together with the session presented by Christian Dickmann earlier today. Not because it happened to be …

#STO7904 VSAN Management Current and Futures by @cdickmann

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Christian Dickmann (VSAN Development Architect) talking about VSAN Management futures in this session, first of all a big fat disclaimer, all of these features may or may not ever make it in to a release and

Virtually Speaking Podcast – VMworld preview

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This week I had the pleasure to join Pete and John again on the Virtually Speaking podcast, together with Ken Werneburg. We spoke about the upcoming VMworld event in Las Vegas. Throughout the show there are …

VSAN Healthcheck: Read Cache Reservations test failed

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I’ve seen this popping up a bunch of times now, and it seems that the problem and solution is not easy to find for people so I thought I would give it a try as well. …

Another major milestone, 5000 customers reached for VSAN!

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Yes, new quarterly results are out, and this is crazy, Yanbing (SVP/GM for Storage & Availability BU) dropped the news on twitter last night:

Essential Virtual SAN second edition paper copy available now!

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As of today Essential Virtual SAN second edition paper copy is available now! If you are interested, pick it up today, note that there is also a Kindle version out there if you prefer that!…

Virtually Speaking Podcast: Rubrik and Virtual SAN

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As John Nicholson was on a holiday I got to co-host the Virtually Speaking Podcast together with Pete Flecha. As a guest we had Chris Wahl and we spoke about many different things, but the key …

Goodbye SAN Huggers!

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This week I presented at the German VMUG and a day after the event someone commented on my session. Well not really on my session, but more on my title. My title was “Goodbye SAN

Disk format version 4.0 update to 2.0 suggested

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I’ve seen some people reporting a strange message in the Virtual SAN UI. The UI states the following: Disk format version 4.0 (update to 2.0 suggested). This is what that looks like (stole the pic from …

Playing around with EMC CloudArray on VSAN

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Today I figured I would play around with EMC CloudArray a bit on top of VSAN. It comes with a VxRail appliance by default so I figured I would check what it has to offer. For …

Can I select VSAN as my placeholder datastore with SRM?

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I received a question today about SRM, vSphere Replication and VSAN. The current documentation for SRM says the following:

Do not select as placeholder datastores any datastores that you use as the replication target datastore for

Can all VSAN Witness VMs for ROBO be in the same VLAN?

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Yesterday I received the question if all VSAN Witness VMs for ROBO can be in the same VLAN? The excellent VSAN 2 node and Stretched Cluster guide for VSAN describes an example of how things can …

Looking for the VROps VSAN Content Pack?

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I just noticed the link for the VROps VSAN Content Pack had changed and it isn’t easy to find through google either. Figured I would post it quickly so at least it is indexed and easier …

Kindle version of Essential Virtual SAN (6.2) available now!

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Just noticed the Kindle version of Essential Virtual SAN (6.2), second edition, is available now! We decided to go for an “e-book” first model to get it to market as quick as possible. I hope …

VSAN everywhere with Computacenter

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This week I had the pleasure to have a chat with Marc Huppert (VCDX181). Marc works for Computacenter in Germany as a Senior Consultant and Category Leader VMware Solutions. He primarily focuses on datacenter technology. I …

600GB write buffer limit for VSAN?

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Write Buffer Limit for VSANI get this question on a regular basis and it has been explained many many times, I figured I would dedicate a blog to it. Now, Cormac has written a very lengthy blog on the topic …

How HA handles a VSAN Stretched Cluster Site Partition

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Over the past couple of weeks I have had some interesting questions from folks about different VSAN Stretched failure scenarios, in particular what happens during a VSAN Stretched Cluster site partition. These questions were in particular …

How is Virtual SAN doing? 3500 customers reached!

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Are you wondering how Virtual SAN is doing? The recent earnings announcement revealed that… Virtual SAN is doing GREAT! Over 3500 customers so far (21 months after the release!) and 200% Year over Year growth. …

Some recent updates to HA deepdive

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Just a short post to point out that I updated the VVol section in the HA Deepdive. If you downloaded it, make sure to download the latest version. Note that I have added a version …

Can I still provision VMs when a VSAN Stretched Cluster site has failed?

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A question was asked internally if you can still provision VMs when a site has failed in a VSAN stretched cluster environment. In a regular VSAN environment when you don’t have sufficient fault domains you cannot …

VSAN Success Story: Zettagrid and VSAN the perfect match for a reliable cloud infrastructure

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Two weeks ago I spoke with Anthony Spiteri about Virtual SAN and how he uses it and why he uses it. For those who don’t know Anthony, he is an architect at a service provider called …

Virtually Speaking Podcast Episode 7 – VSAN Customer Use Cases

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The Storage and Availability Tech Marketing team runs a podcast called Virtually Speaking Podcast every week. This week it was my turn to be a guest on their show. We spoke about VSAN / use cases …

VSAN 6.2, checksumming where you should

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Today I was talking to a customer about the checksum functionality that is part of VSAN 6.2. They asked me if VSAN was still prone to bit rot scenarios, and they mentioned other potential bottlenecks like …

Migrating from Hybrid to All-Flash VSAN

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I had this question twice last week and I went through the exercise in the lab so I figured I would share the experience. Migrating from Hybrid to All-Flash VSAN is pretty straight forward, and is …

Want to hear all about VSAN 6.2? Watch the #SFD9 recordings!

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Last week my colleagues had the pleasure to present at Storage Field Day 9 (SFD9). The topic was Virtual SAN, and more specifically what we released with 6.2 and how we are doing from a business …

VSAN Health checks disabled after upgrade to vCenter 6.0 U2

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Yesterday at the Dutch VMUG I was talking to my friend @GabVirtualWorld. Gabe mentioned that he had just upgraded his vCenter Server to 6.0 U2 in his VSAN environment, but hadn’t upgraded the hosts yet. …

Here you go, VSAN 6.2 GA!

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We’ve been talking about if for a while now, but last night the moment finally arrived… VSAN 6.2 aka vSphere 6.0 Update 2 was released. I am not going to go in to any level of …

Essential Virtual SAN (6.2) available for pre-order

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Just noticed that Essential Virtual SAN (based on 6.2) the second edition is available on Amazon for pre-ordering. If you are interested, make sure to put your order in and get it the day it …

Essential Virtual SAN – Second Edition – Rough Cuts now on Safari!

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essential virtual san second editionCormac Hogan and I have been working hard over the past couple of months to update the Virtual SAN book. It was a lot of work with all the changes that were introduced to Virtual SAN …

Hybrid vs All-flash VSAN, are we really getting close?

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For the last 12 months people have been saying that all-flash and hybrid configurations are getting really close in terms of pricing. During the many conversations I have had with customers it became clear that this …

VSAN 6.2 : Why going forward FTT=2 should be your new default

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I’ve been talking to a lot of customers the past 12-18 months, if one thing stood out is that about 98% of all our customers used Failures To Tolerate = 1. This means that 1 host …

VSAN 6.2 : Sparse Swap, what is it good for?

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I already briefly touched on Sparse Swap in my VSAN 6.2 launch article. When talking about space efficiency and VSAN 6.2 most people will immidiately bring up RAID-5/6 and/or deduplication and compression. Those of course are …

VMUGs next week in South Africa, sign up!

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Last year when I visited South Africa and presented at 3 events someone on twitter said: if I would have known I would have shown up. Already tweeted it a couple of times, but just in …

Check your VSAN disk controllers against the HCL with PowerCLI

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Every now and then customers ask if it is possible to check if disk controllers are on the VSAN HCL for a given set of hosts through PowerCLI. Alan Renouf figured he would knock something out, …

vSphere HA deepdive 6.x available for free!

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I’ve been discussing this over the last 12 months with Frank, and to be honest we are still not sure what is the right thing to do but we decided to take this step anyway. Over …

EMC and VMware introduce VxRail, a new hyper-converged appliance

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As most of you know I’ve been involved in Virtual SAN in some shape or form since the very first release. Reason I was very excited about Virtual SAN is because I felt it would provide …

The 10% rule for VSAN caching, calculate it on a VM basis not disk capacity!

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Over the last couple of weeks I have been talking to customers a lot about VSAN 6.2 and how to design / size their environment correctly. Since the birth of VSAN we have always spoken about …

What’s new for Virtual SAN 6.2?

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Yes, finally… the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I …

Virtual SAN, the leader in the hyper-converged market!

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I was just listening to the VMware earnings call, and needless to say that I was very excited hearing all the great news about Virtual SAN. When I talk to customers this is something that comes …

Rebuilding failed disk in VSAN versus legacy storage

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This is one of those questions that comes up every now and then, I have written about this before, but it never hurts to repeat some of it. The comment I got was around rebuild time …

Disable VSAN site locality in low latency stretched cluster

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This week I was talking to a customer in Germany who had deployed a VSAN stretched cluster within a building. As it was all within a building (extremely low latency) and they preferred to have a …

Jumbo Frames and VSAN Stretched Cluster configurations

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I received a question last week from a customer who had implemented a stretched VSAN cluster. The Health Check after the implementation indicated that there was an “issue” with the MTU configuration. The customer had explained …

VSAN VROps Management Pack version 6.0.3 available

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On the 15th the VROps Management Pack for VSAN 6.0.3 was released. If you have VROps Standard or higher you can take advantage of this management pack. It is supported for the latest release of VSAN, …

Removing stretched VSAN configuration?

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I had a question today around how to safely remove a stretched VSAN configuration without putting any of the workloads in danger. This is fairly straight forward to be honest, there are 1 or 2 things …

VSAN Healthcheck Plugin requires DRS??

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I had a question today on my blog from a user who said that the VSAN Healthcheck Plugin was great but unfortunately required DRS to be able to install/configure it, which means that if you have …

VSAN enabling Sky to be fast / responsive / agile…

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Over the last couple of months I’ve been talking to a lot of VSAN customers. A while ago I had a very interesting use case with a deployment on an Oil Platform. This time it …