More than one mogstored daemon

[Brad Fitzpatrick]

You can just disable that part of mogstored on each service on that IP.
If mogilefsd can't connect to the 7501 side-channel port for size
requests, it resorts to just using HTTP and HEAD requests to find the
sizes.

- Brad


On Mon, 3 Oct 2005, Yuri Subach wrote:

> Hello Brad,
>
> Looks like problem I've described below (fixed port 7501 for handling
> size requests) does not allow me to run multiple mogstoreds on one host.
>
> Is this correct conclusion?
>
> Yuri Subach wrote:
>
> > I modified mogstored source code. First file:
> >    my $path = "/mogdata/dev1/data";
> >    my $listen = "X.X.X.X:7500";
> >
> > Second file:
> >    my $path = "/mogdata/dev2/data";
> >    my $listen = "X.X.X.X:7510";
> >
> > When I'm trying to run these daemons, first works good. But second
> > give me this error: "Error creating socket: IO::Socket::INET: Address
> > already in use"
> > If I try to run second before first, it works fine.
> >
> > The possible reason of this error is following code:
> >
> > # setup a new socket for handling size requests
> > my $server = IO::Socket::INET->new(LocalPort => 7501, # FIXME make
> > this configurable
> >                                   Type      => SOCK_STREAM,
> >                                   Proto     => 'tcp',
> >                                   Blocking  => 0,
> >                                   Reuse     => 1,
> >                                   Listen    => 10 )
> >
> > How can I change this port number and let mogilefsd know about the
> > change?
> >
> >
> > Brad Fitzpatrick wrote:
> >
> >> Should work.
> >>
> >>
> >> On Wed, 28 Sep 2005, Yuri Subach wrote:
> >>
> >>
> >>
> >>> Hello,
> >>>
> >>> You said that we can create miltiple IPs on the server for running if
> >>> multiple mogstoreds. Do you think that we can run 3 mogstored
> >>> daemons on
> >>> one IP but different ports (7500, 7510, 7520)?
> >>>
> >>> Mark Smith wrote:
> >>>
> >>>
> >>>
> >>>> If the only point is to replicate data to different disks on your
> >>>> machine,
> >>>> then you'll have to provide multiple IP address for the machine, or
> >>>> use
> >>>> 127.0.0.1, 127.0.0.2, etc.
> >>>>
> >>>> But that defeats half of the usefulness of MogileFS, which is to
> >>>> spread
> >>>> files across multiple machines, so if someone goes into the server
> >>>> room
> >>>> with their double-barrel shotgun and takes out one the one server,
> >>>> you lose
> >>>> your data (unless a disk survives, but still, you'd have to go put
> >>>> it in a
> >>>> new machine).
> >>>>
> >>>> Anyway, it's doable, but you're either going to have to modify
> >>>> mogilefsd or
> >>>> put multiple IPs on your machine... :)
> >>>>
> >>>> On Tue, Aug 16, 2005, Vitaliy F. Scherbakov wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>> Hello, Everybody.
> >>>>>
> >>>>> Problem:
> >>>>> I have machine with 1 HDD (System) and 3 HDD's (for data), this
> >>>>> machine
> >>>>> has it's own IP-Address. (Data  drives are mounted to /data/devX X in
> >>>>> [1,2,3]). At mogstored: $path = "/data";
> >>>>> Brad, said that Mogile could replicate to devices on different hosts.
> >>>>> Have You any sugestions, how to solve my problem?
> >>>>>
> >>>>> Maybe it is possible to run more than one instance of mogstored or
> >>>>> mogilefsd?
> >>>>>
> >>>>> Best regards,
> >>>>> Vitaliy.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> --
> >>>> Junior (aka Mark Smith)
> >>>> junior at danga.com
> >>>>
> >>>> Software Engineer
> >>>> Six Apart / Danga Interactive
> >>>>
> >>>>
> >>>>
> >>>
> >>> --
> >>> Yuri Subach  subach at whirix.com
> >>> Director of Whirix Ltd.  http://www.whirix.com
> >>>
> >>>
> >>>
> >>
> >
>
> --
> Yuri Subach  subach at whirix.com
> Director of Whirix Ltd.  http://www.whirix.com
>
>