Ups and Downs - The Server Thread

Post by **sabinati** » Mon Sep 21, 2009 2:45 am

skrylar wrote:2) Suggestion: Set up a separate, obviously smaller database which would server as the party time server which gets activated from a pristine snapshot every time the server crashes. There is no point to this, it would just be a place full of arbitrary things the size of only a few grids and would let people run around trying to capture chickens or newbie swarm dragons. Again, no point at all other than it would be amusing during downtime and possibly being able to capture more error logs if people try to use the time to perfect their server crashing techniques. A test server if you will.

this would own

loftar · Post by **loftar** » Mon Sep 21, 2009 2:56 am

skrylar wrote:1) I still say you should take a look in to tokyo cabinet, it runs on the good server OS' and it has an order of magnitude faster response times than what you previously mentioned using (GDBM) for probably the least amount of effort put in.

I'm still not at all convinced by tokyocabinet. If I were to switch to anything but gdbm, it would probably be localmemcache, which seems quite reasonable. The new account server is specially made for minimizing the performance impact from gdbm, though, by doing writes lazily in another thread than that server the needs of the game server. In particular, not switching saves me the trouble of having to migrate the data out of gdbm.

As for a separate server, I have considered setting one up particularly to test features early before migrating them into the main server. It would help particularly with further work on the mapgen in the future, but it would mainly be useful to iron out early bugs in new features right after a dev session. There is a bit of work involved in setting up a separate environment, though.

Blaze · Post by **Blaze** » Mon Sep 21, 2009 3:00 am

Down again.

Is there any information on these crashes? I suspect it's being done on purpose.

loftar · Post by **loftar** » Mon Sep 21, 2009 3:03 am

Blaze wrote:Is there any information on these crashes? I suspect it's being done on purpose.

From the Bugs forum:

loftar wrote:I actually found the bug, and it turned out that it wasn't a bug in the new account server after all. :)

It was just a sleeper bug in the game server, which didn't "hurt" previously since the old account server didn't react to the erroneous condition of the game trying to save data to a non-existent character. It tried to save the log-out position of unfinished characters in the character creation room.

Hopefully, that's the end of that story. To be extra sure, though, I wrote a function to reconnect to the account server and recreate the connection state, so I really hope there won't be anymore rollbacks now.

Obviously, that wasn't the end of the story, though. This time, it crashed when saving a user, and it is less clear what was the error this time around. I'll keep debugging.

Blaze · Post by **Blaze** » Mon Sep 21, 2009 3:06 am

Down again.

Edit: And up.

LegendaryPancake · Post by **LegendaryPancake** » Mon Sep 21, 2009 3:06 am

loftar wrote:
Blaze wrote:Is there any information on these crashes? I suspect it's being done on purpose.
From the Bugs forum:
loftar wrote:I actually found the bug, and it turned out that it wasn't a bug in the new account server after all.

It was just a sleeper bug in the game server, which didn't "hurt" previously since the old account server didn't react to the erroneous condition of the game trying to save data to a non-existent character. It tried to save the log-out position of unfinished characters in the character creation room.

Hopefully, that's the end of that story. To be extra sure, though, I wrote a function to reconnect to the account server and recreate the connection state, so I really hope there won't be anymore rollbacks now.
Obviously, that wasn't the end of the story, though. This time, it crashed when saving a user, and it is less clear what was the error this time around. I'll keep debugging.

Well, at least you're actively trying to fix it.

loftar · Post by **loftar** » Mon Sep 21, 2009 3:09 am

LegendaryPancake wrote:Well, at least you're actively trying to fix it.

I tell you, I've literally had nightmares of the server crashing on me and trying to debug it under stress. This is not only healthy for me...

LegendaryPancake · Post by **LegendaryPancake** » Mon Sep 21, 2009 4:11 am

loftar wrote: I tell you, I've literally had nightmares of the server crashing on me and trying to debug it under stress. This is not only healthy for me...

Did you fix it? Because I was just on for about an hour and it seemed fine to me.

loftar · Post by **loftar** » Mon Sep 21, 2009 4:19 am

Yes, I think I've fixed it now.

VoodooDog · Post by **VoodooDog** » Mon Sep 21, 2009 4:29 am

server still lag a lil

Ups and Downs - The Server Thread

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