By the way, when would be the version 2.1.10 published? 2015-12-15 10:02 GMT+08:00 joseph gao <gaojf.bok...@gmail.com>:
> That's great. Thanks, Alex! > > 2015-10-02 0:36 GMT+08:00 Alexandre Dutra <alexandre.du...@datastax.com>: > >> I confirm that the optional schema metadata feature (JAVA-828 >> <https://datastax-oss.atlassian.net/browse/JAVA-828>) has been merged >> upstream and is included in driver 3.0.0-alpha3 and will as well be >> included in the forthcoming 2.1.8 version. >> >> On a side note, JAVA-664 >> <https://datastax-oss.atlassian.net/browse/JAVA-664> has been open for >> quite a while now and aims to fix the problem you describe. It will >> hopefully make it into 2.1.8 as well, although I cannot guarantee that at >> this point. >> >> Thanks, >> >> Alexandre Dutra >> >> On Mon, Sep 28, 2015 at 7:55 PM Alex Popescu <al...@datastax.com> wrote: >> >>> Besides the others' advice that 2000+ keyspaces might be too much, the >>> latest Java driver (2.0.11) includes an option to disable the Metadata API >>> http://www.datastax.com/dev/blog/datastax-java-driver-2-0-11-released. >>> I'm not sure at this moment if this has been merged into 2.1 already. >>> >>> On Sun, Sep 20, 2015 at 9:22 AM, joseph gao <gaojf.bok...@gmail.com> >>> wrote: >>> >>>> cassandra: 2.1.7 >>>> java driver: datastax java driver 2.1.6 >>>> >>>> Here is the problem: >>>> My application uses 2000+ keyspaces, and will dynamically create >>>> keyspaces and tables. And then in java client, the >>>> Metadata.tokenMap.tokenToHost would use about 1g memory. so this will cause >>>> a lot of full gc. >>>> As I see, the key of the tokenToHost is keyspace, and the value is a >>>> tokenId_to_replicateNodes map. >>>> >>>> When I try to solve this problem, I find something not sure: all >>>> keyspaces have same 'tokenId_to_replicateNodes' map. >>>> My replication strategy of all keyspaces is : simpleStrategy and >>>> replicationFactor is 3 >>>> >>>> So would it be possible if keyspaces use same strategy, the value >>>> of tokenToHost map use a same map. So it would extremely reduce the memory >>>> usage >>>> >>>> thanks a lot >>>> >>>> -- >>>> ------ >>>> Joseph Gao >>>> PhoneNum:15210513582 >>>> QQ: 409343351 >>>> >>> >>> >>> >>> -- >>> Bests, >>> >>> Alex Popescu | @al3xandru >>> Sen. Product Manager @ DataStax >>> >>> >>> >>> <http://cassandrasummit-datastax.com/?utm_campaign=summit15&utm_medium=summiticon&utm_source=emailsignature> >>> >> -- >> Alexandre Dutra >> Driver & Tools Engineer @ DataStax >> > > > > -- > ------ > Joseph Gao > PhoneNum:15210513582 > QQ: 409343351 > -- ------ Joseph Gao PhoneNum:15210513582 QQ: 409343351
