On Tue, Feb 8, 2011 at 12:17 AM, Jiawei Jiang <[email protected]>wrote:
> Hi > > I am studying your system. First, it is a very nice system. > I have confusion on the storage availability: > "Users do rely on storage servers for *availability*. The cipher text is > erasure-coded and distributed across *N* storage servers (the default > value for *N* is 10) so that it can be recovered from any *K* of these > servers (the default value of *K* is 3). Therefore only the simultaneous > failure of *N-K+1* (with the defaults, 8) servers can make the data > unavailable." > I do not know how it works, how a file is encrypted and distributed among > these server. Could anyone briefly explain it to me? > File is encrypted, then cut in small pieces and the pieces get distributed to the N servers. If any K servers are available, the file can be recontructed from the pieces. If less than K servers are available, it can't. Not a 100% accuarte explanation but brief (and hopefully clear). Pandelis > Thanks very much. > > Jiawei Jiang > > <http://int.ask.com/web?siteid=10000861&webqsrc=999&l=dis&q=in%20>
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