|
Vinu,
Quick answers:
1) the Linux-Director is a router (of sorts) for NAT, and a router (of
sorts) for inbound traffic for VS-DR & VS-TUN. As to how the traffic
returns from the realservers to the clients in this latter scenario,
consider this:
* The director ensures the server receives a packet destined for
location A.B.C.D:80
* The real server is configured with a device for that IP.
* Therefore the real server believes it "owns" the connection, and
can reply directly back to the client. The upshot is NAT only
happens on the inbound portion, and for many services this is a
great boost - eg with HTTP, the inbound portion is an order of
magnitude less than the outbound - massively improving
scalability.
2) I Can't answer - I dunno.
3) The LVS provides a mechanism for providing a service, and handles
load balancing part. It assumes that you have a monitoring system in
place to help with failover. Take a look at the High Availability
section on the LVS website for info.
For an alternative view on how LVS works, please take a look at a document
I've produced for our users, which attempts to detail some of the key
points of the LVS, with especial regard to our Pilot LVS-based service due
to be announced later today.
(http://wwwcache.ja.net/JanetService/PilotService.html)
Please note : If there are any conflicts between documents on the LVS
website and my document, my document is wrong - please point out any
discrepancies, and I'll fix them ASAP.
Michael.
--
National & Local Web Cache Support R: G117
Manchester Computing T: 0161 275 7195
University of Manchester F: 0161 275 6040
Manchester UK M13 9PL M: Michael.Sparks@xxxxxxxxxxxxxxx
On Mon, 15 Nov 1999, Vinuthananda B. (CTS) wrote:
> hi,
> I am a newbie to the Linux Virtual Server. I went through the documents in
> the LVS site and wanted a few clarifications.
>
> 1. Is the Linux-Director a router. If not, how do replies from real servers
> get back to the Linux-Director?
> 2. What exactly is the hash table of connections and why is it needed?
> 3. Does the lvs handle failovers
>
> Someone pleasee help me in this regard asap.
> thanx a lot in advance.
>
> bye,
> vinu
>
>
>
>
> ----------------------------------------------------------------------
> LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> To unsubscribe, e-mail: lvs-users-unsubscribe@xxxxxxxxxxxxxxxxxxxxxx
> For additional commands, e-mail: lvs-users-help@xxxxxxxxxxxxxxxxxxxxxx
>
----------------------------------------------------------------------
LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
To unsubscribe, e-mail: lvs-users-unsubscribe@xxxxxxxxxxxxxxxxxxxxxx
For additional commands, e-mail: lvs-users-help@xxxxxxxxxxxxxxxxxxxxxx
|
