programatically, yes, but nodeprobe doesn't expose that yet. Feel free to create a ticket.
On Thu, Oct 29, 2009 at 4:20 AM, Chris Were <[email protected]> wrote: > Is it possible to only backup selected column families? > On Wed, Oct 7, 2009 at 8:15 AM, Jonathan Ellis <[email protected]> wrote: >> >> I don't really see "nodeprobe snapshot" and "mv snapshotdir/* livedir" >> as all that much harder, but maybe that's just me. >> >> for a cluster, just add dsh. >> >> -Jonathan >> >> On Tue, Oct 6, 2009 at 3:42 PM, Joe Van Dyk <[email protected]> wrote: >> > Sure not as easy as a "pg_dump db > dump.sql" and "psql db < dump.sql" >> > though. Oh well. >> > >> > >> > >> > On Tue, Oct 6, 2009 at 11:28 AM, Edmond Lau <[email protected]> wrote: >> >> Thanks for the replies guys. It sounds like restoration via snapshots >> >> + some application-side logic to sanity check/repair any data around >> >> the snapshot time is the way to go. >> >> >> >> Edmond >> >> >> >> On Mon, Oct 5, 2009 at 10:15 AM, Jonathan Ellis <[email protected]> >> >> wrote: >> >>> On Mon, Oct 5, 2009 at 11:23 AM, Thorsten von Eicken >> >>> <[email protected]> wrote: >> >>>> Isn't the question about how you back up a cassandra cluster, not a >> >>>> single node? >> >>> >> >>> Sure, but the generalization is straightforward. :) >> >>> >> >>>> Can you snapshot the various nodes at different times or do >> >>>> they need to be synchronized? >> >>> >> >>> The closer the synchronization, the more consistent they will be. >> >>> (Since Cassandra is designed around eventual consistency, there's some >> >>> flexibility here. Conversely, there's no way to tell the system >> >>> "don't accept any more writes until the snapshot is done.") >> >>> >> >>>> Is there a minimal set of nodes that are >> >>>> sufficient to back up? >> >>> >> >>> Assuming your replication is 100% up to date, backing up every N nodes >> >>> where N is the replication factor could be adequate in theory, but I >> >>> wouldn't recommend trying to be clever like that, since if you >> >>> "restored" from backup like that your system would be in a degraded >> >>> state and vulnerable to any of the restored nodes failing. >> >>> >> >>> -Jonathan >> >>> >> >> >> > >> > >> > >> > -- >> > Joe Van Dyk >> > http://fixieconsulting.com >> > > >
