VDI3: what happens when the Primary VDI core fails?

A potential customer asked me this and I did not really know how to answer the question ... sorry if this was asked before. So here we go:
What happens when and if the Primary VDI core fails? Will the entire VDI3 setup go down? Will running sessions be lost? And how do you fix that?
I found this page:
http://wikis.sun.com/display/VDI3/MySQL+Cluster+Reconfiguration+Scenarios
So I assume the "Non-VDI host ==> Primary Management Host" scenario is what would need to be done?
http://wikis.sun.com/display/VDI3/MySQL+Cluster+Reconfiguration+Scenarios#MySQLClusterReconfigurationScenarios-NonVdiToPrimary
If this is correct then this would answer the "how do you fix that?" part. OK then.
But still I'd welcome if anyone could explain what exactly would happen when and if a Primary VDI core fails. The customer's opinion on this is that they are a "single point of failure" because the Primary VDI host is not redundant (as opposed to the 2 x Secondary VDI cores) ... So, is this assumption correct or not?
Thanks in advance.

Hi,
Assuming you have 3 VDI core hosts. One of them is the primary. And the primary goes down. So what happens then:
* The underlying database is still running on the remaining hosts
* All desktop sessions are still running on the remaining hosts
* New session requests will be handled by the remaining hosts.
* All desktops are still running on the virtualization hosts.
So in essence, your VDI cluster is still healthy. The operation is just impacted in this way:
* You can't add new VDI core hosts
* You can't change the configuration of the Sun Ray server failover group
* A failure of another VDI core host (data node) will result into a complete outage of the underlying database
You should bring up the primary again as soon as possible in order to gain failover capabilities again.
-Dirk

Similar Messages

  • LDAP failover - what happens when the primary LDAP server returns...?

    Hi,
    Got a question regarding LDAP failover...
    I`m running IMS5.2hf2.09 and when our corporate LDAP server has a hiccup the IMS box succesfully fails over to the next one according to the 'local.ugldaphost' configutil entry and the following entry is recorded in the http log:
    [05/Feb/2006:21:00:02 -0500] ******** [29882]: General Error: ldappool: ldap1.***.***.*** : Can't connect to the LDAP server - failover to ldap2.***.***.***However my question is when does it recover back to the original LDAP server (ldap1) or does it stay on the failover LDAP server (ldap2) until that has a problem and so on? In this instance (where it has failed over to ldap2) there are no other log entries saying it has returned back to the original LDAP server (ldap1) yet NETSTAT shows LDAP connections to ldap1.
    Our LDAP team have got some changes planned and so I want to understand the failover process better.
    Thanks,
    Tom
    iPlanet Messaging Server 5.2 HotFix 2.09 (built Nov 18 2005)
    libimta.so 5.2 HotFix 2.09 (built 10:35:58, Nov 18 2005)
    SunOS ******** 5.8 Generic_108528-19 sun4u sparc SUNW,Ultra-80

    Thanks Jay - that makes quite a difference!
    Our failover LDAP server (ldap2) is over in Asia so if the primary LDAP server (ldap1 in US) has a hiccup - ALL LDAP traffic is going to go to Asia until ldap2 has a problem.
    The majority of our IMS servers are in the US so I guess we`ll need to watch out for delays whilst in failover mode.

  • What happens when the multiply effect is applied to both the object and the graphic within?

    Hi everyone,
    I could really use some help with this...
    I'm getting a booklet ready to be printed. Originally, half of the pages were to be printed on paper with a (physical) colour. For budget reasons however, I've now decided to print the paper colour, and have the content of the pages overprinted on the tint in the background, which I've applied to the pages in the background of an additional master page.
    When I set the objects to multiply, they blend with the background colour, which is the effect I'm looking for, as there would be no 'paper white' on the pages that I want to appear as though printed on coloured paper.
    There's something confusing me though; you can also set the graphic within the object frame to multiply. This makes the graphic appear darker, which I don't really understand, since there is no extra colour within the graphic that accounts for this. I've looked at the output in the resulting pdf, and it looks like it's not just an on-screen effect, but the extra amount of (in this case) yellow would also be visible in the printed result.
    Does anyone have an explanation for this? Please see the graphic for a visual example.
    Thanks in advance, kind regards
    Robbin

    Hi.
              Yes. There is a heartbeat mechanism between all cluster members so they detect when a
              member has left the cluster. The primary server recognizes when it's secondary server
              has failed, and then proceeds to search for another member of the cluster to make as
              it's new secondary.
              Regards,
              Michael
              David Whitehouse wrote:
              > I'm trying to figure out what happens when the server holding the replicated state
              > for an object fails.
              > Does the server with the primary object (or the replica-aware stub) recognize
              > the failure and select a new
              > server to hold the replicated state?
              >
              > For instance, Assume I have a cluster defined with three servers - 1,2,3 - with
              > an instance of object A on server 1
              > and the replicated state ino on server 2. What happens if server 2 fails? Is the
              > state now replicated to server 3?
              >
              > Thanks, David
              Michael Young
              Developer Relations Engineer
              BEA Support
              

  • I have both the 250 gb high performance hard drive and a 1 ter byte hard drive.  What happens when the 250 gb hardrive is full?

    I have both the 250 gb high performance hard drive and a 1 ter byte hard drive.  What happens when the 250 gb hardrive is full? This on Imac desktop

    Never let a drive get more than 80% to 85% full.
    AND keep 50-100 GB of free space on a startup drive to allow proper function of virtual memory in all OS X versions from 10.5x to current versions.
    10.4x can get by with 20 GB of free space on the boot drive, but more is always better.
    I try and keep all boot drives between 50 and 60% of capacity.
    Beyond 60% and up to 90% capacity, seek times increase almost exponentially; performance suffers.

  • Lost my iPod, remotely locked it through iCloud. What happens when the battery goes out?

    Hello!
    I lost my Ipod, but managed to locate and lock it remotely through Find my iPod and iCloud. It was located once, but hasn't been located again in the last four days. I think the battery may have run out. What happens when the battery is charged and the iPod turned back on? Does the lock and everything else that can be controlled with Find my iPod still apply?
    Thank you!

    Yes, because when you remotely lock the iPod via Find my iPod, the lock code is set as the lock code that you would use to unlock the iPod if you used a passcode normally. As long as the iPod is still connected to your Apple ID, Find my iPod should work as log as the iPod is connected to wifi.

  • What happens when the Time Machine drive is full?

    I'm on my second iMac. My first one (G5, 1984) died, and I replaced it early 2010 with an Intel mac. The transition when exceedingly well largely due to Time Machine. I just hooked the Time Machine drive to the new system, and I was soon back up running!
    My home folder has 70GB of data. The Macintosh drive has 105GB of data and 395GB free. The Time Machine drive has 220GB used and 30GB free.
    1. What happens when the Time Machine drive is full?
    2. Do I have control over what backups get deleted?
    3. If lightning strikes twice, will I still be able to restore my Intel mac like my G5 mac, even if backups get deleted?
    4. Is there anyway to control what backups/backup files get deleted?
    5. Any other thoughts?
    Thanks.

    maxseven wrote:
    i have deleted the time machine folders and they are now in my trash. when i try to secure empty my trash it will delete everything but the t/m folders. how do i delete them?
    Do you mean all of them? The entire Backups.backupdb folder?
    That's a large mess. First, even a normal delete will take a very long time, as there are probably hundreds of thousands, or even millions, of files. Your best bet by far is to simply erase them with Disk Utility -- that will only take a few moments. If your TM drive has a single partition, see #1 in [Formatting, Partitioning, Verifying, and Repairing Disks|http://web.me.com/pondini/AppleTips/DU.html]. If there are other partition(s) on the drive, see #2 there.
    If not, and you only deleted some of the folders, you have a different, worse problem. Unfortunately, Apple doesn't do a very good job of warning folks: +*Never move, change, or delete anything in your backups via the Finder or Terminal.+*
    You shouldn't have to delete backups at all, since Time Machine will do that automatically when the disk/partition gets full. But you can do it without harm via Time Machine. See #12 in [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum).
    A normal delete will take a very long time, as there are probably tens or hundreds of thousands of items, each of which must be individually deleted. A secure delete will take much, much longer, as each deleted file must be overwritten with zeros.

  • What happens when the CC trial ends? What happens when offline?

    I need Lightroom to work offline on my laptop. What happens if I need to sign in to CC when there is no interned connection and what happens when the CC trial ends on both my laptop and desktop?

    Thanks for answering. I have the standalone version of Lightroom 6 on my Windows 7 64 bit desktop. A number of times when have tried to open the program, the Adobe Application Manager has popped up requiring me to sign in even though I had not knowingly signed out. Lightroom will not launch unless I am signed in. Frequently when Lightroom launches, I see a "Server Busy" message telling me to "switch to the other program" without telling me which program to switch to. I have pinned the AAM to my notification area and have unchecked the "Show OS Notifications box" to see if the "Server Busy" message goes away. So far everything seems to be okay
    Again, thanks for answering me

  • What happens when the iphone app won't open on iphone 4?

    what happens when the phone does not open and automatically shuts down the phone?

    Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved.

  • TS3694 What happens when the iPhone needs an activation and it doesn't respond? Then it asks me to restore it but due to an unknown error (-1) the iPhone can't be restored.

    What happens when the iPhone needs an activation and it doesn't respond? Then it asks me to restore it but due to an unknown error (-1) the iPhone can't be restored.

    Thank you for your response. However, I have done that plenty of times and each time I try to restore my phone, it extracts the software and then when it says restoring with the loading bar, an error message comes up saying an unknown error has occurred.

  • My iPOD classic (last generation) shuts off when jostled--like what happens when the headphones come out.  Any fix for this?

    My iPOD class (last generation) shuts off when jostled--like what
    happens when the headphones come out.  Is there any fix for this?

    I finally resolved my problem after spending way too much time on it. I simply handed my 160GB iPod to my husband to put his fav Stones & Beatles songs on and I went back to my 80GB Microsoft Zune which has never disappointed me.
    After spending so much time trying to figure this out I did finally take it back to Apple Store who performed a diagnostic and found there was a problem with the device. They replaced it with a refurbished one which has similar issues. All I wanted to do was listen to my music. Was that too much to ask? So I am happy to be free of this problematic device. No more Apple for me!!

  • What happens when the computer get too full of e-mails?  Will it automatically start deleting ... or give you some kind of warning??  I never delete personal mail right away since I might want to refer back to it, and then the first thing I know, I've got

    What happens when the computer get too full of e-mails?  Will it automatically start deleting ... or give you some kind of warning??  I never delete personal mail right away since I might want to refer back to it, and then the first thing I know, I've got a big backlog. 

    It will not automatically delete any emails; you will need to do that. You may suffer performance  issues in Mail  if you let your mailboxes become too bloated. And, aside from Mail, the files take up a lot of room are photos, videos, and music, so you might want to watch those - every once in a while, check how much hard drive space you have and make sure you empty the trash regularly. Checking your hard drive space: highlight your Macintosh HD icon on the desktop; hit Command  + I and check the total capacity, and how much is left.

  • What happen when the bill from buying iPad is missing do they need it if something happen to iPad or not... (urgent)

    What happen when the bill/warranty is missing...do they need it

    Where did you buy the iPad? (What store, and was it in person or online?)
    Matt

  • I want to know what happens when the iphone heats up by itself? Do i need to bring it in?

    i want to know what happens when the iphone heats up by itself? Do i need to bring it in?

    Basic troubleshooting is covered in the User's Guide, you should read and follow the steps provided.

  • IPhone 5 replacement now £209. What happens when the 5C is released?

    I have an iPhone 5. Before that I've had almost every iteration of the iPhone and also own an iPad, iMacs, G4 tower before that. Never had much to complain about.
    About 10 weeks ago the iPhone became almost impossible to charge and the connection kept dropping out. Even if you turn vibrate on ring/alert off it'll still vibrate all through the night. I tried cleaning out any lint but the problem persisted. One night in my anger I knocked it off the table to silence it and smashed the screen. Great. It's rather spectacular too there's almost no part not cracked.
    I went into the Apple store and showed them the problem last week (12th September) and was told that the charging issue is probably a build up of lint / debris and that the screen is not covered by warranty but I could get the handset replaced for £170. OK if the charging issue wasn't a problem I can just about swallow that after all it was my doing, BUT I'd have to book a Genius appointment. No problem but it meant I'd have to come back in a few days.
    I arrived on time today (17th September) and patiently waited 30 minutes to be seen. I was told they'd use compressed air and clean out the lightning port and that should solve the charging issue, however the replacement handset will be £209. When I said I was quoted less I was told they'd put their prices up 3 days ago. Surely that's unfair as I was in the store 5 days earlier asking for it to be replaced?
    Also what will happen when the 5C comes out and I do manage to find £209? I would prefer a 5. It couldn't go up again could it?
    Good news though! The handset is now charging at least.

    Apple will continue to have service replacements for the iPhone 5 for a long time to come. So if you go to Apple for an exchange, you'll get the same model of iPhone that you turn in. You will not get a 5C.
    As to the price change, there may be nothing to be done, but if you wanted to get the iPhone replaced  but that the Genius could not or would not do the replacement at that time,  talk to the manager of the Apple Store, explain that you were in and reported the problem before the price increase but could not get a replacement then. Perhaps they'll be able to do something for you. If it was your choice not to replace the iPhone, though, then you're probably stuck, just as with any product price increase when you previously elected not to purchase.
    Regards.

  • What happens when the Main Flash is 25 fps and an external SWF file is 12 fps?

    Hello everyone,
    I have a Main Flash which is set to 25 fps. This Flash is
    used to load an external swf file which was created using 12 fps. I
    would like to know what really happens when the Main Flash loads
    the external swf file? Does the Main file forces the external file
    to be run on 25 fps or the swf file is run with its own 12 fps?
    Any ways, if someone can take the time and explain this, I
    would be greatful.
    Thank you very much and have a great day.
    Khoramdin

    the external swf plays at 25fps - all loaded movies will take
    on the frame rate of the parent movie.
    Chris Georgenes
    Adobe Community Expert
    mudbubble.com
    keyframer.com
    http://tinyurl.com/2urlka
    Khoramdin wrote:
    > Hello everyone,
    >
    > I have a Main Flash which is set to 25 fps. This Flash
    is used to load an
    > external swf file which was created using 12 fps. I
    would like to know what
    > really happens when the Main Flash loads the external
    swf file? Does the Main
    > file forces the external file to be run on 25 fps or the
    swf file is run with
    > its own 12 fps?
    >
    > Any ways, if someone can take the time and explain this,
    I would be greatful.
    >
    > Thank you very much and have a great day.
    >
    > Khoramdin
    >

Maybe you are looking for