If hinting is off. Read Repair and Manual Repair are the only ways data will get there (just like when a single node is down).
On Nov 20, 2011, at 6:01 AM, Boris Yen wrote: > A quick question, what if DC2 is down, and after a while it comes back on. > how does the data get sync to DC2 in this case? (assume hint is disable) > > Thanks in advance. > > On Thu, Nov 17, 2011 at 10:46 AM, Jeremiah Jordan > <jeremiah.jor...@morningstar.com> wrote: > Pretty sure data is sent to the coordinating node in DC2 at the same time it > is sent to replicas in DC1, so I would think 10's of milliseconds after the > transport time to DC2. > > On Nov 16, 2011, at 3:48 PM, ehers...@gmail.com wrote: > >> On a related note - assuming there are available resources across the board >> (cpu and memory on every node, low network latency, non-saturated >> nics/circuits/disks), what's a reasonable expectation for timing on >> replication? Sub-second? Less than five seconds? >> >> Ernie >> >> On Wed, Nov 16, 2011 at 4:00 PM, Brian Fleming <bigbrianflem...@gmail.com> >> wrote: >> Great - thanks Jake >> >> B. >> >> On Wed, Nov 16, 2011 at 8:40 PM, Jake Luciani <jak...@gmail.com> wrote: >> the former >> >> >> On Wed, Nov 16, 2011 at 3:33 PM, Brian Fleming <bigbrianflem...@gmail.com> >> wrote: >> >> Hi All, >> >> I have a question about inter-data centre replication : if you have 2 Data >> Centers, each with a local RF of 2 (i.e. total RF of 4) and write to a node >> in DC1, how efficient is the replication to DC2 - i.e. is that data : >> - replicated over to a single node in DC2 once and internally replicated >> or >> - replicated explicitly to two separate nodes? >> >> Obviously from a LAN resource utilisation perspective, the former would be >> preferable. >> >> Many thanks, >> >> Brian >> >> >> >> >> -- >> http://twitter.com/tjake >> >> > >
