sorry, in my test they dont get distributed equally. the new volume gehts more files (all files with the same size). How exactly the distribution algorithm works would be interesting?! :-) Moritz Am 22.07.2009 um 14:25 schrieb Moritz Krinke: > Barry, > > i just did a test about that. > if you add another subvolume to the DHT volume and add new files > into an existing directory they will be distributed over all DHT- > subvolumes. > > I assume that the distribution on old subvolumes will stop when the > free-space threshold is reached, but i did not test that. > > Moritz > > > Am 21.07.2009 um 18:57 schrieb Barry Jaspan: > >> I have a question about this paragraph from the "Understanding DHT >> Translator": >> >> "Currently hash works based on directory level distribution. i.e, a >> given file's parent directory will have information of how the hash >> numbers are mapped to subvolumes. So, adding new node doesn't >> disturb any current setup as the files/dirs present already have >> its information preserved. Whatever new directory gets created, >> will start considering new volume for scheduling files." >> >> The last sentence suggests that if I have a single directory on a >> DHT volume and it is getting full, adding additional subvolumes to >> the DHT volume will not help because all the files in a directory >> will only ever live in subvolumes that existed at the time the >> directory is created. Is that true? >> >> Also, it sounds like an entry mapping each filename (hash number) >> to a subvolume is stored in the extended attributes of the parent >> directory for that file. What is the practical limit for the >> number of files that can be stored in a single directory under this >> system? It seems like eventually doing a lookup in the directory's >> attributes would itself become a very expensive operation. >> >> Thanks, >> Barry >> >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users > > Moritz Krinke web development | fotocommunity GmbH | rheinwerkallee 2 | 53227 Bonn | tel: +49 228 227888-44 | fax: +49 228 227888-19 | mobil: +49 172 5695482 | mkrinke at fotocommunity.net | http://www.fotocommunity.net | Gesch?ftsf?hrer: Andreas Constantin Meyer, Sven Jan Arndt | HRB 14645 Bonn, Ust-IdNr.: DE814891097
