Patents Assigned to SoftShield, LLC
  • Patent number: 7437473
    Abstract: A content-aware application switch and methods thereof intelligently switch client packets to one server among a group of servers in a server farm. The switch uses Layer 7 or application content parsed from a packet to help select the server and to schedule the transmitting of the packet to the server. This enables refined load-balancing and Quality-of-Service control tailored to the application being switched. In another aspect of the invention, a slow-start server selection method assigned an initially boosted server load metric to a server newly added to the group of servers under load balancing. This alleviates the problem of the new server being swamped initially due to a very low load metric compared to that of others. In yet another aspect of the invention, a switching method dependent on Layer 7 content avoids delayed binding in a new TCP session. Layer 7 content is not available during the initial handshaking phase of a new TCP session.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: October 14, 2008
    Assignee: SoftShield, LLC
    Inventors: Leonard L. Lu, Deh-Phone K. Hsing, Bo-Chao Cheng, Tsong-Ho Wu