Amdump fails to backup large DLEs
- Issue
- amdump fails to backup large DLEs. It fails with "Connection reset by peer" error
message
- Configuration
- iptables (firewall packet filter) is configured on the Amanda clien
- Cause
- iptables was breaking the TCP connections (set up by Amanda client and server for
backing up the data) because it was idle. During backup of large DLEs (~10GB data), the connections will remain idle for a long time.
- Solution
- Increase tcp keepalive probes
echo 90 > /proc/sys/net/ipv4/tcp_keepalive_time