Dear users of the MPP cluster at LRZ, Due to a combined hardware and software maintenance, the MPP cluster will be unavailable for user operation between Monday, August 26 2013, 8:00 am and Friday, August 30, 4:00 pm. Most of the time will be needed to implement improvements in the cooling infrastructure; also an updated operating environment (SLES11 SP2) will be deployed on the cluster. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4633/ Reinhold Bader