Saturday, May 19, 2012

Network Overloaded

During the past 24 hours, Wuala got slower and slower. A few times it went offline completely due to too high load. It took us a while to find it, but it appears that the root cause of this is that the current Wuala client has a bug that caused our network to be overloaded. When a request fails, Wuala waits for 30 seconds an tries again. Here, it would be better to employ so-called "exponential backoff": if the first attempt fails, wait 5 seconds. If the second attempt fails, wait 10 seconds, then 20 seconds, then 40, and so on. This ensures that an overloaded network gets some time to recover itself. However, Wuala had a scheduling bug that caused it to basically do the opposite in some situations: instead of waiting 30 seconds and then trying again, it waited 30 seconds and then tried again twice (or even more times). Consequently, whenever a new retry was scheduled, the requests multiplied, leading to high loads on our networks, causing more connection problems and even more retries. We finally decided to break the cycle by answering excessive requests with an error that lets affected Wuala clients shutdown and show the message "Preventive client shutdown for network stability. Please try restarting Wuala." If you saw this message, you are one of the affected users. We apologize for this inconvenience and hope you understand this measure.

Friday, May 18, 2012

Connectivity problems

Update 13:30:
Issue has been resolved.

10:10 CEST:
Currently, one of our data center operators has connectivity problems. This might make parts of Wuala unavailable to some users.

Sunday, May 13, 2012

Zurich Servers Offline

Connectivity to our Zurich data center had limited connectivity on Sunday 2012-05-13 between 22:00 and 24:00.

Wednesday, March 28, 2012

Connectivity problems

05:15: Currently, one of our data center operators has connectivity problems. This might make parts of Wuala unavailable to some users.

The problem has been resolved by 07:00. Link to the causing incident at OVH:
http://travaux.ovh.net/?do=details&id=6533

Wednesday, February 29, 2012

Connection Problems

Update 11:00 CET:
Issue has been resolved.

Due to current network overload some users can experience transaction problems in Wuala. We are working on resolving the issue.

Tuesday, February 21, 2012

Website not reachable

Update: Everything is back up and working normally again. Thank you for your patience.

_

Due to a technical problem, the website was not reachable this morning. It will back online again in a few minutes.

Wednesday, February 15, 2012

Prolongued Connectivity Problems

Update:
Everything should be up and running normally again. We apologize for any inconvenience.


Tonight, from approximately 01:30 to 06:58, Wuala wasn't available for many users. This was caused by an error in our monitoring system and not detected until early in the morning due to suboptimal processes and a human error related to yesterdays network problems in the data center. We will take measures to prevent this in future. If you have been affected by this issue, please write to support@wuala.com and we provide you with 2 GB of free extra storage.