It looks like we might have lost a bunch of data from the last several months. I have no idea what's going on here, and I haven't been touching anything at all lately.
We do have automatic backups back to October 30th, plus a manual backup from May. I have made sure the backups from the 30th and several days after don't expire.
There is some discussion here.
If anyone knows when this problem occurred, or if they can describe the extent of what has been lost a bit more precisely, I can look at our more recent backups and see whether we can recover anything. But I could really use some help with this. Thank you to anyone who can provide more information! And my apologies for whatever has happened.
Investigating a problem, help appreciated
- emk
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- Blue Belt
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Re: Investigating a problem, help appreciated
I'm pretty sure someone else had the same problem a few weeks ago, but I can't remember who. Also, I remember rdearman replying to that one, but I can't say that for sure. I've had a look through recent posts but haven't managed to find it.
EDIT: I've looked through rdearman's recent posts and can't find it. Either I'm misremembering or the thread has deleted.
EDIT: I've looked through rdearman's recent posts and can't find it. Either I'm misremembering or the thread has deleted.
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Le mieux est l'ennemi du bien (roughly, the perfect is the enemy of the good)
French SC Books: (0/5000 pp)
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French SC Books: (0/5000 pp)
French SC Films: (0/9000 mins)
- emk
- Black Belt - 1st Dan
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Badly neglected "just for fun" languages: Middle Egyptian, Spanish. - Language Log: viewtopic.php?f=15&t=723
- x 6971
Re: Investigating a problem, help appreciated
Is this just affecting certain accounts? Or have we lost all data from everyone during some window of time?
If someone can help me figure out what we're missing, I can look to see if we can restore it. But without knowing what's gone I can't do much.
Also, all the mods should now have my direct personal contact info.
If someone can help me figure out what we're missing, I can look to see if we can restore it. But without knowing what's gone I can't do much.
Also, all the mods should now have my direct personal contact info.
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- Iversen
- Black Belt - 5th Dan
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Ahem, not yet: Norwegian, Afrikaans, Platt, Scots, Russian, Serbian, Bulgarian, Albanian, Greek, Latin, Irish, Indonesian and a few more... - Language Log: viewtopic.php?f=15&t=1027
- x 15991
Re: Investigating a problem, help appreciated
It's not all accounts within a certain time frame. I have checked the entries in my own log back to 2018 (using some lists I keep for that thread), and it seems that only the posts marked as deleted have disappeared I could see them when I was logged in as a moderator, but not if I I logged out - and now I can't see them at all. But if there was a hole covering for instance a week then I would have been able to se it. My guess is that only some random accounts were hit, but those accounts were obliterated in their entirety.
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- emk
- Black Belt - 1st Dan
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Badly neglected "just for fun" languages: Middle Egyptian, Spanish. - Language Log: viewtopic.php?f=15&t=723
- x 6971
Re: Investigating a problem, help appreciated
OK, so the feasible fixes that I could try are:
But unfortunately I am time-limited through the end of the year, which affects how deep I can dig into doing a complex, custom restauration. Just getting the data out is easier.
The other thing that would help a lot is a list of accounts affected, so I knew what to extract.
- Restore either the May 1 or the Oct 30 backup to a new database server.
- Easyish: Manually dump post data for certain users through the backup date.
- Much harder: Try to restore the deleted accounts as if nothing happened.
But unfortunately I am time-limited through the end of the year, which affects how deep I can dig into doing a complex, custom restauration. Just getting the data out is easier.
The other thing that would help a lot is a list of accounts affected, so I knew what to extract.
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Re: Investigating a problem, help appreciated
emk wrote:The other thing that would help a lot is a list of accounts affected, so I knew what to extract.
This is the earliest mention of a deleted account that I recall seeing:
https://forum.language-learners.org/viewtopic.php?f=15&t=21081
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Iliad:
French SC Books:
French SC Films:
Spanish SC Books:
Spanish SC Films:
French SC Books:
French SC Films:
Spanish SC Books:
Spanish SC Films:
- emk
- Black Belt - 1st Dan
- Posts: 1744
- Joined: Sat Jul 18, 2015 12:07 pm
- Location: Vermont, USA
- Languages: English (N), French (B2+)
Badly neglected "just for fun" languages: Middle Egyptian, Spanish. - Language Log: viewtopic.php?f=15&t=723
- x 6971
Re: Investigating a problem, help appreciated
kundalini wrote:This is the earliest mention of a deleted account that I recall seeing:
https://forum.language-learners.org/viewtopic.php?f=15&t=21081
Thank you so much! Unfortunately, it looks like October 8th, which is well after the May 1 backup, but before the oldest remaining daily backup from October 30th. Likely the only way to recover anything in that time window is the Google cache, the Wayback Machine, or maybe a Bing cache if there is one.
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- handa
- Posts: 3
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Re: Investigating a problem, help appreciated
My original account (same username) was among those that were deleted. I made a post to my log thread at the beginning of September and discovered that I couldn't log into my account or reset the password the first week of October.
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- Iversen
- Black Belt - 5th Dan
- Posts: 5050
- Joined: Sun Jul 19, 2015 7:36 pm
- Location: Denmark
- Languages: Monolingual travels in Danish, English, German, Dutch, Swedish, French, Portuguese, Spanish, Catalan, Italian, Romanian and (part time) Esperanto
Ahem, not yet: Norwegian, Afrikaans, Platt, Scots, Russian, Serbian, Bulgarian, Albanian, Greek, Latin, Irish, Indonesian and a few more... - Language Log: viewtopic.php?f=15&t=1027
- x 15991
Re: Investigating a problem, help appreciated
handa wrote:My original account (same username) was among those that were deleted. I made a post to my log thread at the beginning of September and discovered that I couldn't log into my account or reset the password the first week of October.
This observation is important, since it pinpoints that the problem occurred in September or during the very first days of October 2024. So there is a gap between an old backup from May and the current database.
The data up to May could possibly be retreived with SQL select where you first make a list of all the accounts in May and and one valid now and run them together (they probably contain hidden number codes). Then those posts in the result that have missing fields from today are the one that have disappeared. Accounts that were made after May, but before October can't be reconstructed with this method. The posts may actually still be there, but just without any member to refer to. In principle posts from rescued member IDs could potentially still be found, but you need to know the structure of the database to see whether that is possible. Actually, we do know that it mainly is the member list that is in trouble - even if all post of certain members had disappeared you would still see an empty member ID if it just was the list of posts that had been hit. The bad news is of course that the accident that hit the database may have hit both tables because of a command that connected them - and then the summer posts would be gone too.
With a list of lost accounts you can make a select on the table of posts and possibly others too (there may be index tables and things like that - plus tables tied to the PM system etc., but they are probably not important. The result should be one table with lost members and their data plus another with posts up to May for those members (or possibly up till now). And then those tables could be inserted into a copy (NOT the running system, please!!) of the current database to see what happens ... maybe the result is a database where the data can be accessed, but there may be additional tables that have something to do with security that prevents users from seeing them. Images may be lost: since they aren't accessible unless you are logged (a major itch BTW seen from my perspective since new users may think the whole system isn't working properly) they must be located somewhere outside the main database, and heaven knows what state those data are in or how they are connected to the posts that reference them.
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- neofight78
- Blue Belt
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Re: Investigating a problem, help appreciated
I don't know about timing, but I noticed my avatar got deleted and I had to reupload it. Don't know if it's connected to this issue or not, but maybe a useful datapoint?
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