发明名称 |
Content-aware application switch and methods thereof |
摘要 |
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. The method uses the Layer 7 content from a previous session as an estimate to help select the server and uses a default priority to scheduling the transmitting of the handshaking packets. Updated Layer 7 content available after the handshaking phase is then used to reset the priority for the transmit schedule and becomes available for use in load balancing of the next TCP session.
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申请公布号 |
US2002194342(A1) |
申请公布日期 |
2002.12.19 |
申请号 |
US20010883852 |
申请日期 |
2001.06.18 |
申请人 |
TRANSTECH NETWORKS USA, INC. |
发明人 |
LU LEONARD L.;HSING DEH-PHONE K.;CHENG BO-CHAO;WU TSONG-HO |
分类号 |
H04L12/56;H04L29/06;H04L29/08;(IPC1-7):G06F15/16;G06F15/173 |
主分类号 |
H04L12/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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