[Gluster-users] Regarding 2.0.4 booster

[Sudipto Mukhopadhyay]

Hi Shehjar, 

Thanks for looking into this issue. 
The file abc.txt is getting created; if you look at the C program; the
following line is basically printing out the file handle on stdout:

printf ("File handle %d\n",fh);

But, the booster log is getting generated. 

Thanks and regards,
Sudipto 

-----Original Message-----
From: Shehjar Tikoo [mailto:shehjart at gluster.com] 
Sent: Tuesday, July 14, 2009 2:34 AM
To: Sudipto Mukhopadhyay
Cc: gluster-users at gluster.org; avati at gluster.com
Subject: Re: [Gluster-users] Regarding 2.0.4 booster

Sudipto Mukhopadhyay wrote:
> Hi,
> 
> 
> 
> I trying to run some tests w/booster client library and I had to 
> upgrade the glusterfs to version 2.0.4 from 2.0.2 (due to LD_PRELOAD 
> failures of the booster client library, 
>
http://git.savannah.gnu.org/cgit/gluster.git/commit/?id=a3ece0caa52ad2ea
cf8a8691aaca53295cde972f).
> 
> 
> 
> 
> 
> 
> Now, w/version 2.0.4 the LD_PRELOAD works OK, but the booster logs 
> are not generating and I am not sure whether booster is working or, 
> not.
> 
> I have the following booster.conf and client vol specification:
> 
> 
> 
> $cat /etc/glusterfs/booster.conf
> 
> /etc/glusterfs/glusterfs-client.vol /mnt/glusterfs glusterfs
> 
> subvolume=brick,logfile=/tmp/booster.log,loglevel=DEBUG
> 
> 
> 
> $cat /etc/glusterfs/glusterfs-client.vol
> 
> volume brick
> 
> type protocol/client
> 
> option transport-type tcp/client # for TCP/IP transport
> 
> option remote-host 10.16.80.53   # IP address of the server
> 
> option remote-subvolume afr      # name of the remote volume
> 
> end-volume
> 
> 
> 
> volume writebehind
> 
> type performance/write-behind
> 
> option window-size 1MB
> 
> subvolumes brick
> 
> end-volume
> 
> 
> 
> 
> 
> I have written a simple program to test few system calls and the 
> booster functionality:
> 
> int main() {
> 
> 
> 
> int fh;
> 
> char buffer[65];
> 
> 
> 
> fh = open("/mnt/glusterfs/abc.txt",O_WRONLY);
> 
> if (fh == -1) {
> 
> fh = creat("/mnt/glusterfs/abc.txt",O_WRONLY);
> 
> }
> 
> printf ("File handle %d\n",fh);
> 
> close(fh);
> 
> 
> 
> return 0;
> 
> }
> 
> 
> 
> When I run my program with LD_PRELOAD option, I get the following 
> message:
> 
> 
> 
> LD_PRELOAD="/usr/local/lib/glusterfs/glusterfs-booster.so" 
> /root/fstest/a.out
> 
> [2009-07-13 16:19:02] E 
> [libglusterfsclient.c:2447:glusterfs_glh_open] libglusterfsclient: 
> path lookup failed for (/abc.txt)
> 
> File handle 4
> 
> 
> 
> And there is no /tmp/booster.log created. The above log is only 
> observed while creating the file (in case abc.txt is not present).
> 
> Could you please advice on the booster config file and let me know 
> why I am not seeing any booster log?
> 
> 
I'll check why the booster log is not getting generated.
In the mean time, can you check if the file abc.txt really does not
get created on the backend?
If open is failing, it looks like the fd 4 is being returned by
creat call.

-Shehjar


> 
> Appreciate your help.
> 
> 
> 
> Thanks and regards,
> 
> Sudipto
> 
> 
> 
> 
> 
> 
> 
> 
>
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> 
> 
> 
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