World: r3wp
[!AltME] Discussion about AltME
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Gregg 12-Oct-2010 [4956] | Might also explain the file corruption for restored groups here. |
Gabriele 13-Oct-2010 [4957] | actually, the corruption is easily explained by the backup taking place at the same time of someone posting to those groups |
Pekr 13-Oct-2010 [4958] | there should be no corruption, when proper back-up tools are used, no? :-) (e.g. shadow-copy principles, etc.) |
Gabriele 13-Oct-2010 [4959] | if Carl is just doing a TAR while the altme server is running, it's not strange that one or two files don't get backed up correctly. a quick workarourd is to keep more than just the last backup, as the chance of a file missing from two backups is pretty small. of course, ideally one would be using ZFS and backing up from a snapshot... |
Pekr 13-Oct-2010 [4960] | the workaround is to use proper back-up tools, not just tarring the stuff :-) |
Gregg 13-Oct-2010 [4961] | It doesn't help that the client can't detect the issue and save the old data somehow. Once you sync a corrupted group, your local store is gone (unless you're backing them up locally ;-). |
Gabriele 14-Oct-2010 [4962] | (I am backing them up locally, by the way, if Carl needs anything) Proper backup tools can't do anything against the altme server overwriting the files. Either your filesystem supports snapshots, or the altme server has to support the backup operation directly at least by suspending file activity while the files are being copied (or, the file storage has to be designed so that files are immutable, that way at the very least you can't lose old data because of overwriting) |
Maxim 14-Oct-2010 [4963x3] | is it just me or does this mean that moderation and message alteration is actually possible... it would only require a few changes to the server and client so they support this feature. |
damn! my whole user group disapeared !!!! | |
(which means I've just loast every Private message sent to all of you... 4.5 MB of converations :-( | |
Pekr 14-Oct-2010 [4966] | It rewrites your local file, right? It seems that Carl's concept of - keep things simple - in fact turned into - constantly try to reinvent the wheel, never finish it properly, don't scale well, or at all. |
Henrik 14-Oct-2010 [4967] | Is there a problem with AltME at all? All this that has happened seems to not be directly related to AltME, but to the server and the backup scheme. |
Pekr 14-Oct-2010 [4968] | Partially so - but - plain files instead of DB storage of messages. If I understand it correctly, e.g. Links group here, got purged, and it refers to 153.set - old messages are gone, without the notice. |
Gabriele 14-Oct-2010 [4969] | Henrik, the problem is that the server overwrites the client even when the server is wrong (corruption on the server side). It would be nice if it recognized the condition and recovered files from the clients. The other problem is: can you think of a backup scheme to avoid this? (Note, we're speculating on the base of guesses, but still.) |
Henrik 14-Oct-2010 [4970] | Backup scheme: I suppose the only way is really some kind of snapshot, or by having AltME server pack a single file once an hour, that a backup system then can grab and stow somewhere. |
GrahamC 14-Oct-2010 [4971] | or you just run dropbox and have it backup for you automatically .... |
Henrik 14-Oct-2010 [4972] | does it do snapshots of all files simultaneously? |
GrahamC 14-Oct-2010 [4973] | serially I would have thought |
Izkata 14-Oct-2010 [4974] | Okay, so.... I just had to reinstall AltME on linux, so here's some things I noticed: *It took me a little over 4 minutes to resync a little over 60 MB of data (checked net connection for amount transferred) *SQLite and Advocacy both got stuck at the end, re-sycing over and over until I restarted AltME *I clicked through everything because I didn't know there was a "Mark all messages as read" button, until I re-selected my custom dividers... |
Pekr 14-Oct-2010 [4975] | Thank you for noticing me of a button to mark all messages read :-) |
Izkata 14-Oct-2010 [4976] | Yeah, it is kind of hidden... I probably wouldn't have thought to look in the Divider settings for it, either |
Maxim 14-Oct-2010 [4977x2] | I just had a VERY strange problem in altme... its the second time this week and its never happened before... I stopped receiving notifications from altme, but it was still linked in, and not reporting Internet busy.... |
I just did a logout/login and saw that 7 groups had new messages in them !!! | |
Pekr 15-Oct-2010 [4979] | yes, it happens here too. I think that there might be "internet busy" for a while, but then altme reconnects, but does not receive new messages (just speculation, not observation) |
Maxim 15-Oct-2010 [4980] | the strange thing is that pn both occasions I remember hearing a new message "ping" and there being nothing new... which is a bit strange... |
Sunanda 15-Oct-2010 [4981] | Maxim -- I see that regularly....It's the remnants of the old resync bug. Luckily, logging off and back in seems to resync correctly -- not like the old days when getting groups to sync properly was capricious. And sometimes, you'll see the All Groups heading in red, but no group heading below it is in red. It's like a phantom group has just received a message from Jim Phelps. |
Pekr 15-Oct-2010 [4982] | uh oh, belongs to Vent, but - damned, I lost my private messages too :-) |
Maxim 15-Oct-2010 [4983] | (we probably all did) |
Sunanda 15-Oct-2010 [4984] | I still have all my private messages - so the victimise-user config setting must still be below my threshhold. Sympathies to those who lost theirs. |
Pekr 15-Oct-2010 [4985] | Sunanda - so back-it-up promplty, maybe you will follow us with next restart of AltME - one never knows its magic suprises:-) |
Maxim 15-Oct-2010 [4986] | at least my PM chat is now really quick ;-) |
Pekr 15-Oct-2010 [4987] | :-) |
Sunanda 15-Oct-2010 [4988] | Good advice, Petr! Max, Petr -- I've just sent you each a test PM. Did you get them? |
Pekr 15-Oct-2010 [4989] | hmm, strange - I received your PM, but your name in the list was not in red letters .... |
Maxim 15-Oct-2010 [4990] | same here... |
Sunanda 15-Oct-2010 [4991] | Strange ... I saw red from both of you. Did my name float to the top of the list, or was it buried a long way down? |
Pekr 15-Oct-2010 [4992x4] | It was at the top of the list. |
I believe subsequent posts will be red ... try to send a ping to me .... | |
OK, it works ... | |
That way, we can miss if someone contacts us. So the urge is to check if some name is at the top of the list, and better check from time to time .... | |
Sunanda 15-Oct-2010 [4996] | Yep -- both Max and Petr confirm that 2nd message returns the red. So the sync problem seems to resolve itself. But, as Petr says, we should all check the top few in our lists in case there are un-red messages unread. |
Maxim 15-Oct-2010 [4997] | pekr... sent you one... |
Pekr 15-Oct-2010 [4998x2] | ok, not marked as red .... |
this is strange ... there's no new client, so how is that it did not happen in the past? Or just maybe some old bug, which just popped-up under new conditions we got into ... | |
Gabriele 15-Oct-2010 [5000x2] | what i have noticed is that groups that were "lost" did not become red with new messages. if you have lost private messages, maybe that is what is happening as well. |
it seems I still have my private messages, not sure if they'll disappear next time someone writes to me :) I have a backup anyway. | |
Gregg 15-Oct-2010 [5002] | My private messages are all gone too. Due to system changes, my altme backup is 6 months old. |
Tomc 20-Oct-2010 [5003] | Note to self. Do not leave anymore private notes to self ! |
Maxim 20-Oct-2010 [5004] | lost? |
Tomc 20-Oct-2010 [5005] | no but I should not risk it untill I have my own backup, I use it as a sort of distributed note pad |
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