Lin, On Thu, Aug 23, 2012 at 10:10 PM, Lin Ma <[email protected]> wrote: > Thanks, Harsh! > > - "HBase currently keeps a single META region (Doesn't split it). " -- does > it mean there is only one row in ROOT table, which points the only one META > region?
Yes, currently this is the case. We disabled multiple META regions at some point, I am unsure about why exactly but perhaps it was complex to maintain that. > - In Big Table, it seems they have multiple META regions (tablets), is it an > advantage over HBase? :-) Well, depends. A single META region hasn't proven as a scalability bottleneck to anyone yet. A single META region can easily serve millions of rows if needed, like any other region, and I've usually not seen META table grow so big in deployments. -- Harsh J
