Parallelizing rsync

Last week I had a massive hardware failure on one of the GlusterFS storage nodes in the ILRI, Kenya Research Computing cluster: two drives failed simultaneously on the underlying RAID5. As RAID5 can only withstand one drive failure, the entire 31TB array was toast. FML. After replacing the failed disks, rebuilding the array, and formatting […]

CentOS mirror script

If you’ve got more than two or three CentOS machines on your network, it’s really a waste of time and bandwidth for each machine to download the same updates as the previous/next machine. Or, sometimes you tell your users “I just need 5 minutes to run some updates and reboot” and it ends up being […]