> Questions related to this: > 1. Does this put a lot of pressure on the tabletserver which contains the > data, to have many mappers hitting at once during setup for the first wave? >
Yes. However, it depends on the scale. If it's 8K mappers, that might be too many. If it's <100, don't worry about it. > 2. Is there any way whatsoever for the mapper to use the existing client > connection already being made? Or would I have to do the usual setup with > my own zookeeper connection, and if so does that make for a much worse > performance impact? > It won't make any impact on performance; the connections to remote servers are cached and reused under the covers anyhow. The Connection object doesn't hold a connection, it just holds the username/credentials for a creating/using a connection. -Eric
