It should be in the trunk, check it https://github.com/apache/cassandra/blob/trunk/bin/cassandra-shuffle
On Thu, Jan 10, 2013 at 1:18 AM, Manu Zhang <owenzhang1...@gmail.com> wrote: > Is cassandra-shuffle command in the trunk? Or it is only included in the > Debian package? I don't find it in the trunk. > > > On Sat, Nov 3, 2012 at 2:18 AM, Eric Evans <eev...@acunu.com> wrote: > >> On Fri, Nov 2, 2012 at 12:38 AM, Manu Zhang <owenzhang1...@gmail.com> >> wrote: >> >> It splits into a contiguous range, because truly upgrading to vnode >> >> functionality is another step. >> > >> > That confuses me. As I understand it, there is no point in having 256 >> tokens >> > on same node if I don't commit the shuffle >> >> This isn't exactly true. By-partition operations (think repair, >> streaming, etc) will be more reliable in the sense that if they fail >> and need to be restarted, there is less that is lost/needs redoing. >> Also, if all you did was migrate from 1-token-per-node to 256 >> contiguous tokens per node, normal topology changes (bootstrapping new >> nodes, decommissioning old ones), would gradually work to redistribute >> the partitions. And, from a topology perspective, splitting the one >> partition into many contiguous partition is a no-op; it's safe to do >> and there is no cost to speak of from a computational or IO >> perspective. >> >> On the other hand, shuffling requires moving tokens around the >> cluster. If you completely randomize placement, it follows that you >> will need to relocate all of the clusters data, so it's quite costly. >> It's also precedent setting, and not thoroughly tested yet. >> >> -- >> Eric Evans >> Acunu | http://www.acunu.com | @acunu >> > >
