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Esx Migration Operation Timed Out

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Inner SAN vMotion was snappy, 100GB in less than 2 minutes. A bit of searching around, and I didn’t really uncover the cause of it. Not so much. We didn’t really look into it any further. this contact form

When we first observed this issue, we didn’t realize the issue was between SANs, we just thought the issue was random. While doing some digging on performance, our fiber switches, and SAN ports, I wasn’t spotting any obvious issues. What we didn’t clue in on was that this was because of VAAI and “fast copy”. It had to be a fiber or switch issue… Right? https://kb.vmware.com/kb/2007343

Vmotion Fails At 14 Operation Timed Out

This killed 2 stones at once, freed memory on the hosts, and gave the guests a reboot to clear memory and such. 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 This causes a good speed up with regards to moving machines around.

The error usually looks like this: The error generally presented is “Timed out waiting for migration data.” It always happened at 32%. 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 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 Storage Vmotion Operation Timed Out VMware has a nice document on how to do that here in KB1033665.

After some experimentation, I was able to narrow down the cause of the issue on a single action. Vmotion Fails At 21 Ultimately the issue presents itself as a vMotion timeout. We hit the same wall as before, time outs at 32%. At the time we originally spotted this issue, we decided to take an outage and shut the guests down and vMotion them.

There was a caveat to the “fast copy” feature that we stumbled across last year. Vmotion Fails At 67 With a quick bit of work, we moved some guests around, and bumped into the same 32% issue again. Bingo! At this point VMware decides the migration has timed out, and rolls back.

Vmotion Fails At 21

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. 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 Vmotion Fails At 14 Operation Timed Out 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 Timeout Settings This is handy because it stops the data from being sent from SAN to host to SAN again.

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 weblink With a little PowerCLI1 we quickly disable VAAI and tested a vMotion on a live machine, and it worked. That’s it, I had the cause of my problem. 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 Vmotion Operation Timed Out 20

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If the guest is shut down, it usually hangs around 36% for a few minutes, but eventually processes. TheGeekery The Usual Tech Ramblings RSS Blog Archives Categories Disclaimer vSphere Storage vMotion Times Out at 32% When Crossing SANs Feb 17th, 2015 Another feature we discovered was something called “fast copy”. navigate here Shutting down some guests and shuffling them around got us through the pinch, but left me wondering.

We put it down to the load and space issues on the SAN and went with the outage. Vmotion Fails At 90 This was our dev environment anyway, so it was less of an issue. When you start the vMotion, it zips along until it hits 32%.

Storage vMotion between SANs.

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. IntraSAN vMotion, timeouts, and VAAI. 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 Timed Out Waiting For Migration Start Request Intra-SAN migrations would hit 32% and time out.

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). Jump forward to this past Tuesday. It then sits there for a few minutes, sometimes up to 5 or 10, then the guest becomes unresponsive. his comment is here Well, what we stumbled upon was an issue when using vMotion to move machines between SANs.

Sometimes it can take several minutes for the failed guest to start responding again.