On Wed, May 11, 2016 at 8:52 PM, Scott Marlowe <scott.marl...@gmail.com> wrote:
> On Wed, May 11, 2016 at 4:09 AM, Digit Penguin <digitpeng...@gmail.com> > wrote: > > Hello, > > > > > > we use PostgreSql 9.x in conjunction with BIND/DNS for some Companies > with > > about 1.000 queries per second. > > Now we have to scale the system up to 100.000 queries per second (about). > > > > Bind/DNS is very light and i think can not give us bottleneck. > > The question is how to dimension the backend database. > > > > The queries are select (only few insert or update), but the 100.000 > queries > > per second are only select. > > > > How can i calculate/dimensionate? > > We think to put mor ethan one Bind Server (with backend database) > behinbd a > > router with balancing capabilities. > > > > The problem is to know which requirements and limits does a Postgresql > 9.x > > installation - 64 bit - can have. > > Furthermore, we tried Rubyrep (it is quite old!); can you suggest me > other > > replication modules that can work also if connction link, from Database > > Server, went down? > > Definitely looks like multiple read slaves is the answer. How man > depends on a few things. > > How big is your data set? How many clients need to have an open > connection at a time? How man updates / inserts / second are we > talking equals "a few"? One per second? Ten, a hundred, a thousand? > > How often and for how long will your connection link be going down? > Slony is quite robust. Postgresql's built in streaming replication > works well enough if you use something liek WALE or OmniPITR to > archive xlogs and make them available in case of loss of connection. > > -- > To understand recursion, one must first understand recursion. > > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general > You might also want to consider using pgbouncer to help balance the connections/queries among the slaves. -- *Melvin Davidson* I reserve the right to fantasize. Whether or not you wish to share my fantasy is entirely up to you.
