Hi, honestly I think that a creation timestamp would be very useful and it does not cost very much. It would be an immutable value. Nowadays I must keep that info together with the id of the ledger, for instance in zookeeper, but if that reference gets lost there is now way to know how old a ledger is.
-- Enrico Il giorno 20:57 Ven 06/Nov/2015 Sijie Guo <[email protected]> ha scritto: > How you manage the ledgers? Do you keep a list of ledgers? Could you > delete a ledger when it is out of date? That's probably the easier way to > address. > > As what Flavio pointed out, you might need a high level abstraction over > bookkeeper, which manage ledgers, and roll ledgers and delete ledgers when > it it out of date. > > - Sijie > > > On Fri, Nov 6, 2015 at 10:47 AM, Maurício Santiago de Castro < > [email protected]> wrote: > >> I tried to extend LedgerMetadata, BookKeeper and possibly LedgerHandle to >> introduce a timestamp to the metadata on handle creation, but I faced >> package protection problems so I am trying something else. >> >> For now I am playing around with it, but I am thinking about using it >> here <https://github.com/mauricioscastro/basex-lmdb> ( >> https://github.com/mauricioscastro/basex-lmdb) for replicating my >> key/values one level above the lmdb jni client. >> >> Thanks. >> >> >> >> >> On 11/06/2015 04:23 PM, Sijie Guo wrote: >> >> Hello Mauricio: >> >> Are you looking for a mechanism to erase data within a ledger? >> >> - Sijie >> >> On Fri, Nov 6, 2015 at 8:36 AM, Maurício Santiago de Castro < >> <[email protected]>[email protected]> wrote: >> >>> Hi, if I want to erase historical data in the log, say older than 5 days >>> for example, is there any ledger metadata that could help me achieve this? >>> >>> Thanks. >>> >>> -- >>> >>> Maurício Santiago de Castro >>> >>> mauriciosantiagodecastro >>> >>> [image: [email protected]] <[email protected]> >>> <http://br.linkedin.com/pub/mauricio-castro/17/275/a5b> >>> <http://www.delicious.com/mscastro> >>> <http://twitter.com/#%21/mauricioscastro> [image: >>> mauriciosantiagodecastro@facebook] >>> <http://facebook.com/mauriciosantiagodecastro> >>> <https://mscastro.startssl.com/> >>> >> >> >> >> -- >> >> Maurício Santiago de Castro >> >> mauriciosantiagodecastro >> >> [image: [email protected]] <[email protected]> >> <http://br.linkedin.com/pub/mauricio-castro/17/275/a5b> >> <http://www.delicious.com/mscastro> >> <http://twitter.com/#%21/mauricioscastro> [image: >> mauriciosantiagodecastro@facebook] >> <http://facebook.com/mauriciosantiagodecastro> >> <https://mscastro.startssl.com/> >> > >
