More than one device on a host

Oezcan Acar acar at unitedinter.net
Fri May 11 21:41:33 UTC 2007


tracker1:/home/bizimalem # mogadm --lib=/usr/lib/perl5/5.8.7/ --trackers=192.168.1.2:6001 check
Checking trackers...
  192.168.1.2:6001 ... OK

Checking hosts...
  [ 1] storage1 ... OK

Checking devices...
  host device         size(G)    used(G)    free(G)   use%   ob state   I/O%
  ---- ------------ ---------- ---------- ---------- ------ ---------- -----
  [ 1] dev1           463.738      1.619    462.119   0.35%  writeable  20.0
  [ 1] dev2   REQUEST FAILURE
  ---- ------------ ---------- ---------- ---------- ------
             total:   463.738      1.619    462.119   0.35%
tracker1:/home/bizimalem #


dev2 is also writeable, the docroot for dev2 is in /dev2/mogdata (harddisk 2) . dev1 resides in /database/mogdata (harddisk 1)



 
-------- Original-Nachricht --------
Datum: Fri, 11 May 2007 21:31:32 +0000 (UTC)
Von: Brad Fitzpatrick <brad at danga.com>
An: Oezcan Acar <acar at unitedinter.net>
CC: mogilefs at lists.danga.com
Betreff: Re: More than one device on a host

> MogileFS doesn't auto-detect or auto-add new disks at all.
> 
> You have to TELL IT about new disks (and where they are) with mogadm.
> 
> See... ?
> 
> $ mogadm
> Usage:  (enter any command prefix, leaving off options, for further help)
> 
>   mogadm check                     Check the state of the MogileFS world.
>   mogadm stats                     Show MogileFS system statistics.
>   mogadm host ...
>          host add ...              Add a host to MogileFS.
>          host delete ...           Delete a host.
>          host list                 List all hosts.
>          host mark ...             Change the status of a host. 
> (equivalent to 'modify --status')
>          host modify ...           Modify a host's properties.
>   mogadm device ...
>          device add ...            Add a device to a host.
>          device list               List all devices, for each host.
>          device mark ...           Mark a device as
> {alive,dead,down,readonly}
>   mogadm domain ...
>          domain add ...            Add a domain (namespace)
>          domain delete ...         Delete a domain.
>          domain list               List all hosts.
>   mogadm class ...
>          class add ...             Add a file class to a domain.
>          class delete ...          Delete a file class from a domain.
>          class list                List all classes, for each domain.
>          class modify ...          Modify properties of a file class.
>   mogadm slave ...
>          slave add ...             Add a slave node for store usage
>          slave delete ...          Delete a slave node for store usage
>          slave list                List current store slave nodes.
>          slave modify ...          Modify a slave node for store usage
>   mogadm fsck ...
>          fsck clearlog             Clear the fsck log
>          fsck printlog             Display the fsck log
>          fsck reset ...            Reset fsck position back to the
> beginning
>          fsck start                Start (or resume) background fsck
>          fsck status               Show fsck status
>          fsck stop                 Stop (pause) background fsck
>          fsck taillog              Tail the fsck log
>   mogadm settings ...
>          settings list             List all server settings
>          settings set ...          Set server setting 'key' to 'value'.
> 
> 
> $ mogadm  device
> Help for 'device' command:
>  (enter any command prefix, leaving off options, for further help)
> 
>   mogadm device add <hostname> <devid> [opts]        Add a device to a
> host.
>   mogadm device list                                 List all devices, for
> each host.
>   mogadm device mark <hostname> <devid> <status>     Mark a device as
> {alive,dead,down,readonly}
> 
> 
> 
> On Fri, 11 May 2007, Oezcan Acar wrote:
> 
> > That was actually my question: how detects mogilefs the device on the
> storage node? In my case  I added to mogstored.conf
> >
> > docroot=/database/mogdata
> >
> > and created with mkdir -p /database/mogdata
> >
> > After this operation device list output was:
> >
> > dev1: alive      1.618   462.119 463.737
> >
> > Mogilefs was able to detect the device on the storage node. After that I
> added the second device on the same storage node. Device list showing:
> >
> > dev1: alive      1.618   462.119 463.737
> > dev2: alive      0.000   0.000   0.000
> >
> > How mogilefs now knows on which disk dev2 resides?
> >
> > thanks.
> >
> >
> >
> >
> >
> >
> >
> > -------- Original-Nachricht --------
> > Datum: Fri, 11 May 2007 21:18:27 +0000 (UTC)
> > Von: Brad Fitzpatrick <brad at danga.com>
> > An: Oezcan Acar <acar at unitedinter.net>
> > CC: mogilefs at lists.danga.com
> > Betreff: Re: More than one device on a host
> >
> > > MogileFS keeps track of two states, for both devices and hosts:
> > >
> > >   1) what you told it ("alive")
> > >   2) what it actually observed.
> > >
> > > My guess is that dev2 isn't actually writable, so it's not being used.
> > > Verify permissions and such?
> > >
> > > You can see what mogile thinks of your devices with one of the mogadm
> > > commands (in somewhat-but-not-too recent mogadm/mogilefsd...)
> > >
> > > - Brad
> > >
> > >
> > > On Fri, 11 May 2007, Oezcan Acar wrote:
> > >
> > > > Hi,
> > > >
> > > > I added 2 harddisk one one host to mogilefs.
> > > >
> > > > device list:
> > > >
> > > > storage1 [1]: alive
> > > >                    used(G) free(G) total(G)
> > > >   dev1: alive      1.618   462.119 463.737
> > > >   dev2: alive      0.000   0.000   0.000
> > > >
> > > >
> > > > mogstored.conf on storage1:
> > > >
> > > > httplisten=0.0.0.0:7500
> > > > mgmtlisten=0.0.0.0:7501
> > > > docroot=/database/mogdata
> > > >
> > > > How to activate dev2 on storage1?
> > > >
> > > > thanks.
> > > >
> > > >
> > > >
> > > > --
> > > > Mit freundlichen Grüßen
> > > >
> > > > ___________________________
> > > >
> > > > Özcan Acar, Dipl. Inf(FH)
> > > > Vorstand
> > > > Smart Web Business AG
> > > >
> > > > Im Niederfeld 8
> > > > 65462 Gustavsburg
> > > >
> > > > +49 171 57 33 66 5
> > > > acar at unitedinter.net
> > > >
> > > >
> >
> > --
> > Mit freundlichen Grüßen
> >
> > ___________________________
> >
> > Özcan Acar, Dipl. Inf(FH)
> > Vorstand
> > Smart Web Business AG
> >
> > Im Niederfeld 8
> > 65462 Gustavsburg
> >
> > +49 171 57 33 66 5
> > acar at unitedinter.net
> >
> >

-- 
Mit freundlichen Grüßen

___________________________

Özcan Acar, Dipl. Inf(FH)
Vorstand
Smart Web Business AG

Im Niederfeld 8
65462 Gustavsburg

+49 171 57 33 66 5
acar at unitedinter.net



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