Tcp Zero Window

https://www.wireshark.org/docs/wsug_html_chunked/ChAdvReassemblySection.htmlhttps://blog.apnic.net/2014/12/15/ip-mtu-and-tcp-mss-missmatch-an-evil-for-network-performance/https://wiki.wireshark.org/TCP%20ZeroWindow http://wesmorgan.blogspot.jp/2011/03/tcp-zero-windows-and-why-they-can-be.html TCP Zero Windows – and Why They Can Be VERY Bad TCP zero windows FIN says “i finished talking to you, but i’ll still listen to everything you have to say until you’re done” RST says “there is no conversation. i won’t say anything and i won’t listen to anything you say” –… Continue reading Tcp Zero Window

Breaking yum infinite loop

When executing “yum update openssl*”, it seems yum runs into infinite loop: –> Running transaction check —> Package gmp.x86_64 0:4.3.1-7.el6_2.2 will be updated –> Processing Dependency: libgmp.so.3()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64 –> Processing Dependency: libgmp.so.3()(64bit) for package: ppl-0.10.2-11.el6.x86_64 —> Package python.x86_64 0:2.6.6-29.el6_2.2 will be updated –> Processing Dependency: python(abi) = 2.6 for package: pygtksourceview-2.8.0-1.el6.x86_64 –> Processing… Continue reading Breaking yum infinite loop

Useful docs regarding Application Continuity

Graceful Application Switchover in RAC with No Application Interruption (Doc ID 1593712.1) Client and Application Failover Validation Matrix (Doc ID 1617163.1) PDB Failover in a Data Guard environment: Unplugging a Single Failed PDB from a Standby Database and Plugging into a New Container (Doc ID 2088201.1) Understanding Transparent Application Failover (TAF) and Fast Connection Failover… Continue reading Useful docs regarding Application Continuity