Dear Saros Developers, I talked to the IT staff about the recent events (unplanned shutdown of our VMs on Monday).
Here is what happened: * During the last weekend, the memory of the VM host reported an ECC error. The IT stuff decided to put the host in maintenance mode and migrate the VMs. * Due to some VMware idiosyncrasies I don't understand, the pure existence of old snapshots during a migration leads to massive I/O and computation for resolving the big delta between the old snapshotted version and the current state of the VM. * Since the resolving of just *one* of our snapshots took 30 minutes and the IT staff wanted to address the actual issue at hand, the VMs were shutdown completely. Lessons learned: * VMware snapshots are not a good way to maintain backups for a long time span. * For the given scenario (system update on the VMs) we still can use snapshots -- but we aren't allowed to create them ourselves. From now on, we'll have to file a ticket for the staff, they will create a snapshot, we will update our system, and after a week or so, the staff will delete the snapshot. * For backup purposes, the IT staff will set up a backup job, which will run on a daily basis. Apparently snapshots are not the weapon of choice here. @Holger: For the latter I have a few more questions: * Scope: Do we need a complete backup of the whole system or just a some directories? * Frequency: Do we need a daily backup? Or does a less often backup suffice? And: Did you already install the SSH keys of the IT staff on saros-build? Best Regards, Franz ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Dpp-devel mailing list Dpp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dpp-devel
