Enrico, so you are interested in a creation time of a ledger. that sounds a good field to carry on a ledger. I think it could be easily exposed via ledger manager, since a znode already have a creation time I believe. If not, we could think about adding a filed in ledger metadata.
Do you mind creating a ticket to ask for this feature? - Sijie On Fri, Nov 6, 2015 at 1:25 PM, Enrico Olivelli <[email protected]> wrote: > 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 delete a ledger when it is out of date?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 it it out of date.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/> >>> >> >>
