Hello Ben, Basically the ids are document Ids. We will eventually have several billion documents in our system, and each has a unique long id. Currently we are using a database sequence to generate these longs. Having eliminated other uses of the database, we didn't want to keep it around just to generate ids. That is why I am looking to use ZooKeeper to generate them instead.
Satish On Fri, Apr 24, 2009 at 8:27 AM, Benjamin Reed <br...@yahoo-inc.com> wrote: > i'm not exactly clear how you use these ideas, but one source of unique ids > that are longs is the zxid. if you create a znode, everytime you write to > it, you will get a unique zxid in the mzxid member of the stat structure. > (you get the stat structure back in the response to the setData.) > > ben > > > Mahadev Konar wrote: > >> Hi Satish, >> Most of the sequences (versions of nodes ) and the sequence flags are >> ints. >> We do have plans to move it to long. >> But in your case I can imagine you can split a long into 2 32 bits - >> >> Parent (which is int) -> child(which is int) >> Now after you run out of child epehemarls then you should create a node >> Parent + 1 >> Remove parent And then start creating an ephemeral child >> >> (so parent (32 bits) and child (32 bits)) would form a long. >> >> I don't think this should be very hard to implement. Their is nothing in >> zookeeper (out of the box) currently that would help you out. >> >> Mahadev >> On 4/23/09 4:52 PM, "Satish Bhatti" <cthd2...@gmail.com> wrote: >> >> >> >>> We currently use a database sequence to generate unique ids for use by >>> our >>> application. I was thinking about using ZooKeeper instead so I can get >>> rid >>> of the database. My plan was to use the sequential id from ephemeral >>> nodes, >>> but looking at the code it appears that this is an int, not a long. Is >>> there any other straightforward way to generate ids using ZooKeeper? >>> Thanks, >>> >>> Satish >>> >>> >> >> >> > >