Re: [Moosefs-users] changelogs on the metalogger

[Michał B. <mic...@ge...>]

Hi!

Unfortunately this can cause other problems. If after each save you close
the file and later open it, you'll blow the metalogger. Maybe you would
rather use: fflush(eptr->logfd). We are further investigating why the
changelogs may not save on metalogger. 


Regards
Michał 


-----Original Message-----
From: Bán Miklós [mailto:ba...@vo...] 
Sent: Wednesday, September 08, 2010 10:33 PM
To: moo...@li...
Subject: Re: [Moosefs-users] changelogs on the metalogger

Hi, 

Sorry, I was wrong. The version no is 1.6.17.

I've patched the  mfsmetalogger/masterconn.c file with the following
lines:

140a141
> 
187a189,192
>       if (eptr->logfd) {
>               fclose(eptr->logfd);
>           eptr->logfd = NULL;
>       }

which have solved that problem. So this is the bug fix. There was no
fclose after opening the changelog_ml.0.mfs.

Miklos



On Wed, 8 Sep 2010 14:33:39 -0400
Travis Hein <tra...@tr...> wrote:

> 
> On 2010-09-06, at 10:16 AM, Bán Miklós wrote:
> 
> >> 
> >> Metaloggers should continuously receive the current changes from
> >> the master server and write them into its own text change logs
> >> named changelog_ml.0.mfs. 
> >> 
> >> How do you know that in your system they are save hourly? Don't
> >> they increment with every change in the filesystem?
> > 
> > Yes, exactly. There is no new lines on metalogger server's
> > changelog_ml.0.mfs, while the master's changelog.0.mfs updating.
> > Nevertheless the sessions_ml.mfs is updating continuously.
> > My server version is 1.6.7 and it is running on Ubuntu Jaunty.
> > 
> 
> Did you mean 1.6.17 ?,, or 1.5.7.  (There was no 1.6.7 release?) 
> 
> I was concerned, if you were not running the latest server and
> metalogger, perhaps this would be a bug that has already been fixed.
> 
> Travis
> 
> 
> 
> 
>
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