RC-E User Manual
Management Client (RC-E Manager)
5. Click
OK
.
6. In
the
Recordings Action
dialog that follows, select whether already existing - but
non-archived
-recordings
should be moved along to the new storage or deleted.
7. After selecting, click
OK
.
See also Record Tab Overview (on page 103).
About Upgrading
If you upgrade your RC-E system to version 4.0 (or later), you might discover that you end up with a lot more storages
than before the upgrade. This is due to the fact that from RC-E 4.0 and forward, the database structure is different
than it used to be and during the update process, the system creates a number of extra databases. However, since
your original naming-convention is respected, you are able to reconstruct your former database structure with only
little modification of devices and deletion of obsolete storages or databases.
Manage Multicasting
OnSSI RC-E supports multicasting of live streams from recording servers. In cases when many Ocularis Client users
want to view live video from the same camera, multicasting can help save considerable system resources.
Multicasting is only possible for live streams; not for recorded video/audio.
If a recording server has more than one network interface card, it is only possible to multicast on one of them.
Through the Management Client you are able to specify which one to use.
The successful implementation of multicasting also requires that your network equipment (switches, etc.) has been
set up to relay multicast data packets to the required group of recipients only. If not; multicasting may not be different
from broadcasting, which can significantly slow down network communication.
What Is Multicasting?
In regular network communication, each data packet is sent from a single sender to a single recipient - a process
known as unicasting. With multicasting, however, it is possible to send a single data packet (from a server) to multiple
recipients (clients) within a group. Multicasting can thus help save bandwidth.
When
using
unicasting
, the source must transmit one data stream for each recipient.
When
using
multicasting
, only a single data stream is required on each network segment.
Multicasting is therefore an interesting option for streaming live video from recording servers to Ocularis Client s since
video streams will not be duplicated on each network segment.
Multicasting as described here is
not
streaming of video from camera to servers.
With multicasting, you work with a clearly defined group of recipients, based on options such as IP address ranges,
the ability to enable/disable multicast for individual cameras, the ability to define largest acceptable data packet size
(MTU), the maximum number of routers a data packet must be forwarded between (TTL), etc. Thus, multicasting
should not be confused with the much more primitive method
broadcasting
, which would send data to everyone
connected to the network, even if the data is perhaps not relevant for everyone:
Unicasting
sends data from a single source to a single recipient
Multicasting
sends data from a single source to multiple recipients within a clearly defined group
Broadcasting
sends data from a single source to everyone on a network; broadcasting can thus significantly slow
down network communication.
On-Net Surveillance Systems, Inc.
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