Volume Migration Deleted Data
sohcah
PROOP

2 years ago

Just migrated my Postgres database Volume from the Oregon to the Virginia region, and suddenly loads of data is gone.

36 Replies

sohcah
PROOP

2 years ago

03366656-1bad-4591-bfdd-134b17afd697


2 years ago

@Nico - data loss via migration?


2 years ago

point us to the service in question please


sohcah
PROOP

2 years ago

"Postgres 2.0" (https://railway.app/project/03366656-1bad-4591-bfdd-134b17afd697/service/1a102620-c9d6-446d-8a00-ed0ed496ba70), volume "pgdata" (https://railway.app/project/03366656-1bad-4591-bfdd-134b17afd697/volume/cbbc2db4-611b-41b3-9f92-5e9a27962265/metrics)


2 years ago

thank you


2 years ago

ack, looking into this


sohcah
PROOP

2 years ago

I had previously migrated 2 other volumes (for CZ3 OTA and CZ3 Assets) and they both went smoothly.


sohcah
PROOP

2 years ago

I've got a dump of basically all important data from earlier today, so if the data from just prior to migration can't be restored, I should be able to restore that dump if necessary --- but if I'm able to get the data from just prior to migration restored, that would be better.


2 years ago

Just to confirm, is the data actually missing, or could it be the usage metric only?


sohcah
PROOP

2 years ago

1280187232149438500


sohcah
PROOP

2 years ago

Gone so far as Postgres suggesting database does not exist.


2 years ago

thanks, we are investigating


sohcah
PROOP

2 years ago

Thanks for the quick responses!
Was feeling pretty hopeful about this working correctly based on the 2 larger, unimportant ones migrating correctly - wish one of those had failed instead of this! 😂


2 years ago

really sorry about this
the migration workflow appears to have worked correctly (taking a snapshot and restoring it to the new volume)
we are investigating why this led to an empty volume


2 years ago

we'll keep you posted as soon as we have an update


sohcah
PROOP

2 years ago

👍


sohcah
PROOP

2 years ago

One thing I realise I didn't mention initially, but I realise now might be important - at the same time as switching the service's region, I also changed the runtime from Legacy to V2.


2 years ago

Not sure if that's relevant, but thanks for the info


2 years ago

Still looking into the issue, will keep you posted


sohcah
PROOP

2 years ago

Do you think there's any chance of getting the data from prior to the migration restored?
If this isn't likely, I'd probably prefer to sooner-than-later spend some time restore my older backup and get caches refilling, and deal with the slight data loss.


2 years ago

I just recovered a dump from 3:41 (UTC+2)


2 years ago

I can send it over. Are you ok with restoring a dump yourself?
Depending on which dump is the freshest (yours or the one I just recovered), I can send it over


sohcah
PROOP

2 years ago

Looks like my dump is slightly fresher -- but yours might be more complete, so would appreciate having that just in case there's any data I need from it that isn't in mine.


2 years ago

(just to be clear 3:41pm UTC+2)


2 years ago

I'll send it over


sohcah
PROOP

2 years ago

Thanks!


2 years ago

The dump is too big for discord, I'm posting it on gcs, will be right back


2 years ago

I'll send you the link via dm


2 years ago

could you please accept the request?


sohcah
PROOP

2 years ago

Accepted


2 years ago

Once again, apologies for this issue
We opened a ticket to investigate how a seemingly successful migration ended up with an empty volume


2 years ago

Hey @sohcah, I've gone ahead and added $250 of credits to your team for the trouble caused by the issue. Hope this helps !


sohcah
PROOP

2 years ago

Thank you, that is most appreciated!
Appreciate all of the quick responses and support here, especially on a US Public Holiday!


2 years ago

hey @sohcah just wanted to circle back, where you able to restore the dump and resume operations?


sohcah
PROOP

2 years ago

Yep - got all public systems back up and running yesterday.
Still a few bits for some internal systems I need to clean up, but I've got all of the data I need to do so, and that's very low priority.


2 years ago

awesome, glad you where able to get everything back up and running, do you think it's okay to mark this as solved?


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