We are preparing to apply the final fix to Chef cluster 8 (where am I?). For the final step, we will need to take Chef completely down for about 20 minutes. We will be doing that in 30 minutes to 1 hour from now. To Chef users it may appear journals are missing or read-only.
After it is back up, there may be some bad data in memcaches so some lingering problems may exist while we clear them, but they will go away.
No data will be lost.