Actually we have been thinking something in similar lines, and better to converge on this. I would like to generalize it beyond bookies, at the level of ledger directories.
One simple usecase is, say we have a distribution of SSDs and HDDs on each bookies, and we have ledger storage on SSDs and HDDs. - Have at least one copy on SSD and other two on HDD. - Writer need to be aware of this classification - Replication logic need to be aware of this logic. - While reading attempt to read from SSD first. - Reader also need to be aware of this logic. This will push bookkeeper towards the long term storage, also can be a stepping store towards introducing storage tiers in the future. On Wed, Apr 6, 2016 at 12:51 AM, Sijie Guo <si...@apache.org> wrote: > This sounds interesting. But it might need to think a bit careful to make > it generic useful and easier to extend for different requirements. > > +1 on 4.5.0 and it would be good that you could raise more details on the > jira. > > On Wed, Apr 6, 2016 at 1:05 AM, Enrico Olivelli - Diennea < > enrico.olive...@diennea.com> wrote: > > > Hi Bookkeepers, > > I just filed this new feature issue > > https://issues.apache.org/jira/browse/BOOKKEEPER-912. > > > > My problem is to restrict the set of bookie to be used for each > particular > > ledger, this is because in a multi-tenant environment I have many bookies > > but I would like to use only a specific subset of bookies (machines) for > > each tenant, according to SLAs. Actually EnsemblePlacementPolicy is > system > > wise and using only that facility I cannot achieve my goal. > > > > Does this feature sound interesting ? > > Ideas? > > > > I would work on this for 4.5.0 (giving that it will be released in Q3 or > > Q4) > > > > > > > > -- > > Enrico Olivelli > > Software Development Manager @Diennea > > Tel.: (+39) 0546 066100 - Int. 925 > > Viale G.Marconi 30/14 - 48018 Faenza (RA) > > > > MagNews - E-mail Marketing Solutions > > http://www.magnews.it > > Diennea - Digital Marketing Solutions > > http://www.diennea.com > > > > > > ________________________________ > > > > MagNews è sponsor di ABI Dimensione Cliente – 7 e 8 Aprile > > http://www.magnews.it/2016/03/17/dimensione-cliente-2016/ > > > > Iscriviti alla nostra newsletter per rimanere aggiornato su digital ed > > email marketing! http://www.magnews.it/newsletter/ > > > > The information in this email is confidential and may be legally > > privileged. If you are not the intended recipient please notify the > sender > > immediately and destroy this email. Any unauthorized, direct or indirect, > > disclosure, copying, storage, distribution or other use is strictly > > forbidden. > > > -- Jvrao --- First they ignore you, then they laugh at you, then they fight you, then you win. - Mahatma Gandhi
