Hello,
I have a question about this from the NOTES: The latest TwistedSNMP version (0.3.13) contains a bug that manifests in table retrieval operations. Timeouts and retries aren't handled properly, and this may cause slow or otherwise busy devices to be bombarded with requests from NAV. The `contrib/patches` directory contains a patch for TwistedSNMP that solves this problem. The patch has been submitted upstream, but not yet accepted into a new release. Alternatively, you can install `pynetsnmp` for improved performance.
I think I am running into the Twisted SNMP timeout issues talked about here. So my question is this: When it says, "Alternatively, you can install pynetsnmp for improved performance" does that mean that instead of patching TwistedSNMP, i can just do an apt-get install pynetsnmp and then I don't have to worry about the Twisted SNMP library's problems?
If so, do I have to uninstall twisted SNMP?
If I still have to patch Twisted, then what is the best way for me to go from using the standard debian packaged TwistedSNMP to using the patched one I build from scratch? I don't want to be stuck where I have both installed, but it is still using the old version.
Thanks in advance,
Greg
On Mon, 14 Nov 2011 15:42:42 -0600 Greg Cooper gwc2004@gmail.com wrote:
I think I am running into the Twisted SNMP timeout issues talked about here. So my question is this: When it says, "Alternatively, you can install pynetsnmp for improved performance" does that mean that instead of patching TwistedSNMP, i can just do an apt-get install pynetsnmp and then I don't have to worry about the Twisted SNMP library's problems?
Yes. On Debian, the package is called python-pynetsnmp. I think I already posted about this on the list already, but if you're running Debian Lenny, then using python-pynetsnmp may cause ipdevpoll to segfault.
If so, do I have to uninstall twisted SNMP?
Not at all. ipdevpoll will pick pynetsnmp if available, falling back to TwistedSNMP if not.
If I still have to patch Twisted, then what is the best way for me to go from using the standard debian packaged TwistedSNMP to using the patched one I build from scratch? I don't want to be stuck where I have both installed, but it is still using the old version.
Thanks in advance,
Although it seems dirty, the files installed by the TwistedSNMP package can be patched directly on a running system, since it's just Python code and not compiled binaries. As soon as the TwistedSNMP package is upgraded or reinstalled the patch will be lost, however.
For the servers we operate, we took the twistedsnmp source package from Debian, added the patch to the patches directory, rebuilt the package with an updated release number and added it to our internal package repository.
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Greg Cooper -
Morten Brekkevold