[gfarm-discuss:04377] Re: replication with file busy

[Osamu Tatebe <tatebe@xxxxxxxxxxxxxxxx>]

Hi Fernando,

"file text busy" in Gfarm file system means some process
is opening the file in write mode.  In this case, Gfarm
file system prohibits to create the file replica.

But, this can happen if you terminate a program by Ctrl-C
when the program is writing a file unless you use gfarmfs
to mount Gfarm file system.  

Even in this case, you can access this file in read-only
mode by, for example, "gfexport" command, or "cat" command
via gfarmfs or syscall hooking library.

When you are sure there is no process writing the file,
you can unset "file text busy" flag by "gfsplck" command
after applying the attached patch.

% gfhost | gfrun -H - gfsplck vm-dfbsateste

Also, regarding the 'host' entry in host information database,
it is registered as an alias name of xen01.domain.com.
If you want to remove it, try

% gfhost -mA xen01.domain.com

Thanks,
Osamu 

On Tue, 03 Oct 2006 11:07:58 -0300 Fernando Ribeiro da Silva <fernando@xxxxxxxxxxxxx> wrote:

> Hi all,
> 
> 	I'm trying to use gfarm with xen to virtualization.
> 	I have created loop devices and storage its under the gfarm, it work 
> fine, live migration working too.
> 	With fault tolerance tests i look this:
> 
> xen01:~# gfhost -l -v
> 0.00/0.00/0.00 s i386-debian3.0-linux 4 xen01.domain.com(10.10.10.1) host
> 0.00/0.00/0.01 s i386-debian3.0-linux 4 xen02.domain.com(10.10.10.2)
> 
> xen01:~# gfwhere vm-dfbsateste
> 0: xen01.domain.com
> 
> xen01:~# gfrep -N 2 vm-dfbsateste
> gfrep: replicate gfarm:/root/vm-dfbsateste:0 from xen01.domain.com to 
> xen02.domain.com: text file busy
> 
> 	Is possible to migration a busy file? How are the replication process? 
> Is a block replication?
> 
> 	In the 'gfhost -l -v' I look a work 'host' in end line, what's it mean?
> 
> 	Thank you a million by attention.
> 
> Best Regards,
> Fernando Ribeiro
> 
> -- 
> -----------------------------------------------------
> - Fernando Ribeiro da Silva
> - RHCE - Red Hat Certified Engineer
> - LPIC-2 - Advanced Linux
> - CCSA - CheckPoint Cert. Security Admin.
> - phone: +1 775 659 7310, +55 61 9115 4852
> - http://www.musb.org
> -----------------------------------------------------
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