Thanks a lot for the gist Joe! MessagePack the fastest? I'll study in deep the benchmark asap. giorgio
Il giorno domenica 8 novembre 2015 18:47:11 UTC+1, Joe ha scritto: > > I'm not sure if you're asking for options of this sort, but perhaps > messagepack might be a reasonable storage structure idea for your > unstructured data? According to this gist, it's very fast. You would also > gain access to the data via other programming languages down the road, if > that happened. > https://gist.github.com/eirc/1300627 > > Just a thought. > > -Joe > > On Nov 7, 2015, at 4:26 AM, Giorgio Robino <[email protected] > <javascript:>> wrote: > > Hi all! > not exactly a question related to Sequel (but more about Sqlite). I'm > asking here because I decided to use Sequel always I have to use a > relational DB :) > > Problem: > I'd like to use a Sqlite3 database also as key/value storage (programming > in Ruby). Of course Sqlite3 is not a "mandadatory" choice and I already > saw, by example, thta Sequel, foresee Posgres HSTORE/JSON/JSONB extension, > but let assume for a moment to use Sqlite: > > - both in as usual way (relational tables management with Sequel ORM) > > - and also to have a table just to store that key/value storage (call it > nosql if you like), where "value" is a free format [Ruby hash]( > http://docs.ruby-lang.org/en/2.0.0/Hash.html). > > Imagine a sqlite3 table with two columns: > > chat_id | data > ------------+------------------------------------------------------ > 1276262 | { state: :add_item, list: ['2 pizze 4 Stagioni con > peperoncino', '2 mezze minerali gassate] } > 1276263 | { state: :new_address, address: '...', location: '..-' } > 1276264 | { profile: '...', tastes: {...}, tags: [...] } > ... | ... > > where > `data` column must contain a free format hash, varying from record to > record with differents hash fields composition. Let say also that I do not > need to do any complex search inside the `data` column, but I only need to > persist in the DB getting a record (load to RAM) and the putting back the > record (dump to DB for persitence). **In the more performant way!**. Let > consider the code: > > > > > require 'sequel' # the great Sequel ( > https://github.com/jeremyevans/sequel) ORM > require 'sqlite3' # for accessing Sqlite3 (https://www.sqlite.org/) > database > > DB = Sequel.connect('sqlite://chat.db') > > DB.create_table :sessions do > string :chat_id, primary_key: true > blob :data # case 2, see below > # or text :data, case 1, see below > end > > sessions = DB[:sessions] > hash = { state: :add_item, list: ['2 pizze 4 Stagioni con > peperoncino', '2 mezze minerali gassate] } > > > Now consider inserting some hash data in `sessions` table. > Possible solutions in my mind to set the `data` column: > > 1. [JSON serialize](https://github.com/intridea/multi_json) to a `TEXT` > type column ? > > sessions.insert(chat_id: id, data: Multi_json.dump(hash) > > > 2. [Marshal serialize](http://ruby-doc.org/core-2.2.0/Marshal.html) in a > `BLOB` type colum ? > > sessions.insert(chat_id: id, data: Sequel.blob(Marshal.dump(hash)) > > > BTW: > > - I'm aware by the fact that Ruby Marshalling could be not portable data > solution, but maybe more performant; isnt'it ? > > - With "session" of course I do not refer to any HTTP session in usual > way, but to an application (a chat specifically) session. > > Any better idea to do this dump/load in a more smart way ? > Welcome also any suggestion also using any alternative solution (a part > using Sqlite) ? > > Please sorry for my possibly trivial question here. > thanks fin advance for your patience. > giorgio > > -- > You received this message because you are subscribed to the Google Groups > "sequel-talk" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > To post to this group, send email to [email protected] > <javascript:>. > Visit this group at http://groups.google.com/group/sequel-talk. > For more options, visit https://groups.google.com/d/optout. > > -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sequel-talk. For more options, visit https://groups.google.com/d/optout.
