Dear Sir,

If your ntop really is _new_ (ie 2.1.56 or 2.1.57, the configure output
shows which version at the foot), -S has been replaced by storing data
in an rrd.

The rrds are located in the ntop log directory eg

tssyd# ls /var/log/ntop/
LsWatch.db      addressCache.db dnsCache.db     hostsInfo.db
ntop_pw.db      prefsCache.db   rrd

tssyd# ll /var/log/ntop/rrd/
total 5
drwx------  2 nobody  nobody  512 Feb  1 17:10 flows
drwx------  2 nobody  nobody  512 Feb  1 17:10 graphics
drwx------  2 nobody  nobody  512 Feb  1 17:10 hosts
drwx------  3 nobody  nobody  512 Feb  1 17:10 interfaces
drwx------  2 nobody  nobody  512 Feb  1 17:10 matrix
tssyd# ll /var/log/ntop/rrd/interfaces/fxp0/
total 1536
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_BEABytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_CacheBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_DNSBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_HTTPBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_LPDBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_MailBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_NBios-IPBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_NtopBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 21 23:54 IP_PCAnyBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb  9 23:54 IP_PSCAMBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_SAPBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_SNMPBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_SSHBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_TelnetBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 IP_VirusBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44
activeHostSendersNum.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 broadcastPkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 ethernetBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 ethernetPkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 icmpBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 ipBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 knownHostsNum.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 multicastPkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 ospfBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 tcpBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 udpBytes.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 upTo1024Pkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 upTo128Pkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 upTo1518Pkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 upTo256Pkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 upTo512Pkts.rrd
-rw-rw-rw-  1 nobody  nobody  48924 Feb 24 22:44 upTo64Pkts.rrd
tssyd# 


It is your responsibility to archive/manage the RRD data if you want
historical retention.

This probably means periodically extacting data from the 'ntop
collector' rrd's and saving it somewhere else (eg a bigger rrd at your
'central site').

Yours sincerely.

 -- 
------------------------------------------------------------------------
Stanley Hopcroft
------------------------------------------------------------------------

'...No man is an island, entire of itself; every man is a piece of the
continent, a part of the main. If a clod be washed away by the sea,
Europe is the less, as well as if a promontory were, as well as if a
manor of thy friend's or of thine own were. Any man's death diminishes
me, because I am involved in mankind; and therefore never send to know
for whom the bell tolls; it tolls for thee...'

from Meditation 17, J Donne.
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