Thursday, July 7, 2011

Scalability concepts

  • Google BigTable
    http://labs.google.com/papers/bigtable.html

  • BigData : are datasets that grow so large that they become awkward to work with
    http://en.wikipedia.org/wiki/Big_data

  • Hadoop

  • MapReduce : Google framework

  • Dynamo: Amazon's Highly Available Key-value Store
    http://www.allthingsdistributed.com/files/amazon-dynamo-sosp2007.pdf


  • - Master / slave
    - peer to peer
    - cluster: similar components
    - grid: different components
  • Wednesday, July 6, 2011

    aptitude search result

    p, meaning that no trace of the package exists on the system,
    c, meaning that the package was deleted but its configuration files remain on the system,
    i, meaning that the package is installed,
    v, meaning that the package is virtual.

    The second character indicates the stored action (if any; otherwise a blank space is displayed) to be performed on the package
    i, meaning that the package will be installed,
    d, meaning that the package will be deleted,
    p, meaning that the package and its configuration files will be removed.

    If the third character is A, the package was automatically installed