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Vmotion Fails At 14 Operation Timed Out


Storage vMotion between SANs. Inner SAN vMotion was snappy, 100GB in less than 2 minutes. With a little PowerCLI1 we quickly disable VAAI and tested a vMotion on a live machine, and it worked. Our VM hosts had storage allocated from 2 different SANs at the time, and our naming convention was a little off, so identifying quickly that the data store was on a navigate here

If the guest is shut down, it usually hangs around 36% for a few minutes, but eventually processes. This was our dev environment anyway, so it was less of an issue. In layman’s understanding of this feature, when a storage vMotion request was created, the SAN was notified of the request, and the SAN would process the copying of the bits in That’s it, I had the cause of my problem. https://kb.vmware.com/kb/2007343

Vmotion Fails At 14 Operation Timed Out

IntraSAN vMotion, timeouts, and VAAI. At this point VMware decides the migration has timed out, and rolls back. This is something they actually give you in the KB article as well.↩ Posted by Jonathan Angliss Feb 17th, 2015 3par, san, storage, vmware Tweet « Enable-RemoteMailbox - The address is Another feature we discovered was something called “fast copy”.

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Okay, the details don’t exactly match, for example the document mentions that it freezes at 10%, but it had all the hallmarks of what we were seeing. Intra-SAN migrations would hit 32% and time out. For example, removing a VM guest would tell the SAN that the guest had been removed, and if the data store had been thinly provisioned from the SAN, it’d clean up Storage Vmotion Operation Timed Out This causes a good speed up with regards to moving machines around.

Not so much. Vmotion Fails At 21 This killed 2 stones at once, freed memory on the hosts, and gave the guests a reboot to clear memory and such. Fast forward to nine months ago, and we had an issue where we discovered one of our SANs had become over saturated, and needed space and load removed from it. https://kb.vmware.com/kb/2007343 It then sits there for a few minutes, sometimes up to 5 or 10, then the guest becomes unresponsive.

We didn’t really look into it any further. Vmotion Fails At 67 A sudden alert that multiple VMs had gone offline left us puzzled until we realized that one of the data stores had been way overprovisioned, and the backup software kicked off When you start the vMotion, it zips along until it hits 32%. The error usually looks like this: The error generally presented is “Timed out waiting for migration data.” It always happened at 32%.

Vmotion Fails At 21

After some experimentation, I was able to narrow down the cause of the issue on a single action. Recent Posts Set-DnsServerResourceRecord and OldInputObject Not Found Powershell and Single vs Double Quotes Replace SSL on Office Web Apps Farm and Certificate Not Found Powershell and Progress Feedback Custom Windows Installs, Vmotion Fails At 14 Operation Timed Out At the time we originally spotted this issue, we decided to take an outage and shut the guests down and vMotion them. Vmotion Timeout Settings It had to be a fiber or switch issue… Right?

Shutting down some guests and shuffling them around got us through the pinch, but left me wondering. http://supportcanonprinter.com/timed-out/operation-timed-out-windows-10.html What we didn’t clue in on was that this was because of VAAI and “fast copy”. As we were working on a single cluster at the time, this is what we ended up with: 1 2 3 4 5 Get-VMHost -Location (Get-Cluster Sometimes it can take several minutes for the failed guest to start responding again. Vmotion Operation Timed Out 20

There was a caveat to the “fast copy” feature that we stumbled across last year. We hit the same wall as before, time outs at 32%. We put it down to the load and space issues on the SAN and went with the outage. http://supportcanonprinter.com/timed-out/vmotion-operation-timed-out.html VMware has a nice document on how to do that here in KB1033665.

Well, what we stumbled upon was an issue when using vMotion to move machines between SANs. Vmotion Fails At 90 Ultimately the issue presents itself as a vMotion timeout. Bingo!

So the solution was to disable VAAI on the host, do the vMotion, and then re-enable it if you still want to use it.

At this point, we now had a third SAN added to the mix, so we presented new data stores, and went through the process of trying to vMotion quite a lot Jump forward to this past Tuesday. This is handy because it stops the data from being sent from SAN to host to SAN again. Timed Out Waiting For Migration Start Request When we first observed this issue, we didn’t realize the issue was between SANs, we just thought the issue was random.

With a quick bit of work, we moved some guests around, and bumped into the same 32% issue again. A bit of searching around, and I didn’t really uncover the cause of it. Doing some searching again on our favourite web search engine, I stumbled across an HP document tucked away in the 3Par area (document was named mmr_kc-0107991, nice name). weblink TheGeekery The Usual Tech Ramblings RSS Blog Archives Categories Disclaimer vSphere Storage vMotion Times Out at 32% When Crossing SANs Feb 17th, 2015

While doing some digging on performance, our fiber switches, and SAN ports, I wasn’t spotting any obvious issues.