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Diffstat (limited to 'report/chapters/2-lit-r.tex')
| -rw-r--r-- | report/chapters/2-lit-r.tex | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/report/chapters/2-lit-r.tex b/report/chapters/2-lit-r.tex index b0b7b78..0c1780d 100644 --- a/report/chapters/2-lit-r.tex +++ b/report/chapters/2-lit-r.tex @@ -35,10 +35,10 @@ operations -- Create, Rename, Update, Delete (CRUD) -- are possible. Information about the files stored in the unified location is stored in a SQLite database. Unlike combox, which depends the file storage provider' client to sync file fragments/shards to the file -storage provider's server, the Android application developed by Yeo et -al. takes the responsibility to sync file fragments/shards to each -file storage provider and uses the OAuth 2.0\cite{protocol:oauth2} -protocol for authorization. +storage provider's data store, the Android application developed by +Yeo et al. takes the responsibility to sync file fragments/shards to +each file storage provider and uses the OAuth +2.0\cite{protocol:oauth2} protocol for authorization. For encrypting file fragments, they use AES-256; the key for encrypting file fragments is derived from the user's password by using @@ -46,12 +46,12 @@ Password-Based Key Derivation Function (PBKDF2)\cite{kaliski}. For erasure coding they use the JigDFS library\cite{jigdfs}. The Android application is able do ``progressive streaming'' of media files; this means that large media files can be streamed in real-time from the -from the file storage providers' servers; this is an attractive +from the file storage providers' data store; this is an attractive feature in a ``resource constrained'' device where storage is expensive. Yeo et al. propose methods for achieving data de-duplication; file -compression based on the type of the file; intelligent pre-fetching +compression based on file type; intelligent pre-fetching and caching of file fragments and ``automatic restoration in exploiting file-versioning''; these features were not implemented in the prototype Android application and there is possibility of Yeo et @@ -79,7 +79,7 @@ storage provider. In SkyCDS, the content delivery to subscribers of the content is segregated into two distinct layers -- Metadata Flow Layer and the Content Flow Layer. The publisher of the content largely interacts -with the Metadata Flow Layer that controls and keeps track of the what +with the Metadata Flow Layer that controls and keeps track of what content is published and the subscriber also largely interacts with the Metadata Flow layer to subscribe to content published in the content delivery system. The Content Flow Layer is where the content @@ -110,7 +110,7 @@ space and reliability. \verb+git-annex+ allows one to version controlled large files that are not usually feasible to version control under -\verb+git+\cite{program:git}. \verb+git-annex+, checks in the names +\verb+git+\cite{program:git}. \verb+git-annex+, checks in the name and other meta-data about the files in git and stores the actual content under \verb+.git/annex+ directory. When a file is added to \verb+git-annex+, a symlink of the file is created in place of the @@ -163,10 +163,10 @@ nex/objects/3j/vG/SHA256E-s108196923--7de9484ee96908268e21b451eb9805552c32b44da0 Now, the file \verb+deb-nicholson-80s.medium.webm+ is checked into \verb+git-annex+ and we can now do a \verb+git annex sync+ to sync the repository to other \verb+git-annex+ repositories. It must be noted -here that that when the repository is synced, the file content itself -is not transferred to the other \verb+git-annex+ repositories; only -the file's name and its meta-data that is stored in a separate git -branch called \verb+git-annex+ are +here that when the repository is synced, the file content itself is +not transferred to the other \verb+git-annex+ repositories; only the +file's name and its meta-data that is stored in a separate git branch +called \verb+git-annex+ are transferred\cite{documentation:git-annex-hworks}. In order to create a copy of a given file in another git annex repository, \verb+git annex get /path/to/filename.ext+ has to done. |