On Thursday 01 February 2007 13:10, James Harper wrote: > > Yes, providing you don't mind prematurely killing off non-keepalive > > programs > > that are inactive during the reduced keepalive period you have set. > > I couldn't find anything definitive in the kernel source, but looking > through it did remind me of the TCP_KEEPIDLE, TCP_KEEPINTVL, and > TCP_KEEPCNT ioctl's, which allow per-socket tuning of the parameters for > which the defaults are defined in /proc/sys/net/ipv4.
I have never looked into the possibility of setting socket specific parameters. If that exists on all platforms and does not require root permission, it could effectively be a solution -- in fact, the heartbeat could instead of being implemented in Bacula code, could simply set the appropriate values. I'll let you or someone else do the necessary research on the OS end (i.e. what ioctls exist, what privileges do they need, for Unix, Linux, Win32). If they all support something reasonable, I could see re-implementing the Bacula heartbeat code to tweak the keepalive time so that users could "fool" the braindamaged routers. > > For this to be useful in any way to bacula there would have to be a > global config option to override this, and to be more useful you'd have > to be able to set these options per client and/or sd. And to be ideally > useful you'd need to define networks, define the tuning required between > each pair of networks, and then allocate the sd, fd, and dir to a > network. Sounds like a lot of work for not a lot of gain, although would > also allow you to add other tuning parameters like tcp window, cork, and > buffering, which could make a real difference when using bacula over > high speed high latency links, and could also be part of item 37 (Cause > daemons to use a specific IP address to source communications). > > James ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
