To answer your second question, data is replicated across multiple data centers globally. The developer docs don't mention much detail about this however it is mentioned in the original blog post <http://googleappengine.blogspot.ca/2011/01/announcing-high-replication-datastore.html> when HRD went live. Most of the links are now broken, but the original paper detailing the replication algorithm mentioned in the post, 'Paxos Made Live <http://static.googleusercontent.com/media/research.google.com/en//archive/paxos_made_live.pdf>', is still available. A more recent publication detailing Google's replication strategies is 'Megastore: Providing Scalable, Highly Available Storage for Interactive Services <http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/36971.pdf> '.
On Saturday, December 12, 2015 at 1:29:03 PM UTC-5, Richard Cheesmar wrote: > > Hi, All > > I have a few of questions regarding data security and sensible backup > routines. > > 1. How vulnerable are GAE ndb datastores to data loss? Not focusing > specifically on any specific reason, more interested though in physical > dangers such as power outs or damage to the infrastructure rather than > hacking attacks, although this is important too. > > 2. Is data for a single app based at one location or shared around Google > Cloud data centers? > > 3. What do others recommend as a sane regime for backing up data on the > cloud datastore? > > Thanks in advance > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/254ecee8-5b78-47d6-9a98-059f11585b55%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
