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Cosa sono i seed, peer e i leech

Cosa sono i seed, peer e i leech

Commenta ● 15 febbraio 2010 ● Andrea

Non stiamo parlando dei “small embryonic plant”, neppure dei The Seeds (The Seeds è un gruppo Garage Rock formatosi a Los Angeles nel lontano 1965), vogliamo parlare dei seed, peer e leech, termini da conoscere prima di scaricare qualsiasi file torrent. Come funziona il tutto ?

PER INIZIARE

Se avete letto “Introduzione ai file torrent” saprete che gli elementi “fondamentali” per scaricare dei torrent sono un client torrent ma anche un motore di ricerca torrent come IsoHunt o Pirate Bay. Come potete vedere dagli screenshots presenti alla destra di questo articolo, una ricerca su Pirate Bay ma anche qualsiasi altro motore di ricerca torrent viene svolta come su Google, inseriamo i termini che sono attinenti agli elementi multimediali da scaricare e premiamo INVIO. I risultati delle ricerche sono tantissimi, tutti contraddistinti dalle sezioni S e L che stanno rispettivamente per Seed e Leech.

Seed e Leech (IsoHunt)I SEED

I Seed sono i nodi della rete che ci interessano di più, sono le persone che hanno il file (o files) completo dandoci quindi maggiori garanzie di portare a termine il download. E’ buona regola quando esploriamo i motori di ricerca torrent affidarci univocamente a download che abbiano un gran numero di persone in fase di Seeding, non rimarremo delusi da un eventuale download a metà.
NOTE – Seeding è la fase di solo invio di un file torrent, viene svolta in automatico non appena portiamo a termine un download di un file torrent. La fase di seeding può essere interrotta in ogni momento.

LEECH

eMule ci ha abituato a diventare pazienti grazie alle code. Con un download via torrent non occorre essere pazienti, incominciamo subito a scaricare poichè anche i “Leechers” condividono ciò che stanno scaricando, nonostante si tratti di persone che devono ancora portare a termine un download.
I leech sono un dato rilevante quando cerchiamo qualcosa nei motori di ricerca torrent, sono le persone che non hanno portato ancora a termine un download

PEER e TRACKER

Conosciamo cos’è un client torrent, un motore di ricerca torrent e come identificare i seed e leech (seeders e leechers), l’ultimo vocabolo che è da conoscere è il termine peer. Quando scarichiamo via torrent il primo passaggio è il download di un file torrent, pochi byte che verranno interpretati dal nostro client torrent, una volta identificati diventiamo un nodo della rete grazie anche alla presenza del tracker.

Un tracker di BitTorrent (via Wikipedia) è un server a cui ogni client della rete deve connettersi. Prima di iniziare il download il client deve comunicare col tracker così come i client che gia hanno iniziato il download devono periodicamente mettersi in contatto con il tracker per poter ottenere un refresh della lista dei peers con cui comunicare

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