[Gluster-users] Rsync

[Hiren Joshi]

> -----Original Message-----
> From: Pavan Vilas Sondur [mailto:pavan at gluster.com] 
> Sent: 24 September 2009 12:42
> To: Hiren Joshi
> Cc: gluster-users at gluster.org
> Subject: Re: Rsync
> 
> Can you let us know the following:
> 
>  * What is the exact directory structure?
/abc/def/ghi/jkl/[1-4]
now abc, def, ghi and jkl are one of a thousand dirs.

>  * How many files are there in each individual directory and 
> of what size?
Each of the [1-4] dirs has about 100 files in, all under 1MB.

>  * It looks like each server process has 6 export 
> directories. Can you run one server process each for a single 
> export directory and check if the rsync speeds up?
I had no idea you could do that. How? Would I need to create 6 config
files and start gluster:

/usr/sbin/glusterfsd -f /etc/glusterfs/export1.vol or similar?

I'll give this a go....

>  * Also, do you have any benchmarks with a similar setup on say, NFS?
NFS will create the dir tree in about 20 minutes then start copying the
files over, it takes about 2-3 hours.

> 
> Pavan
> 
> On 24/09/09 12:13 +0100, Hiren Joshi wrote:
> > It's been running for over 24 hours now.
> > Network traffic is nominal, top shows about 200-400% cpu (7 cores so
> > it's not too bad).
> > About 14G of memory used (the rest is being used as disk cache).
> > 
> > Thoughts?
> > 
> > 
> > 
> > <snip>
> > > > > > 
> > > > > > An update, after running the rsync for a day, I killed it 
> > > > > and remounted
> > > > > > all the disks (the underlying filesystem, not the gluster) 
> > > > > with noatime,
> > > > > > the rsync completed in about 600 minutes. I'm now going to 
> > > > > try one level
> > > > > > up (about 1,000,000,000 dirs).
> > > > > > 
> > > > > > > -----Original Message-----
> > > > > > > From: Pavan Vilas Sondur [mailto:pavan at gluster.com] 
> > > > > > > Sent: 23 September 2009 07:55
> > > > > > > To: Hiren Joshi
> > > > > > > Cc: gluster-users at gluster.org
> > > > > > > Subject: Re: Rsync
> > > > > > > 
> > > > > > > Hi Hiren,
> > > > > > > What glusterfs version are you using? Can you send us the 
> > > > > > > volfiles and the log files.
> > > > > > > 
> > > > > > > Pavan
> > > > > > > 
> > > > > > > On 22/09/09 16:01 +0100, Hiren Joshi wrote:
> > > > > > > > I forgot to mention, the mount is mounted with 
> > > > > direct-io, would this
> > > > > > > > make a difference? 
> > > > > > > > 
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: gluster-users-bounces at gluster.org 
> > > > > > > > > [mailto:gluster-users-bounces at gluster.org] On 
> Behalf Of 
> > > > > > > Hiren Joshi
> > > > > > > > > Sent: 22 September 2009 11:40
> > > > > > > > > To: gluster-users at gluster.org
> > > > > > > > > Subject: [Gluster-users] Rsync
> > > > > > > > > 
> > > > > > > > > Hello all,
> > > > > > > > >  
> > > > > > > > > I'm getting what I think is bizarre 
> behaviour.... I have 
> > > > > > > about 400G to
> > > > > > > > > rsync (rsync -av) onto a gluster share, the data is 
> > > > > in a directory
> > > > > > > > > structure which has about 1000 directories 
> per parent and 
> > > > > > > about 1000
> > > > > > > > > directories in each of them.
> > > > > > > > >  
> > > > > > > > > When I try to rsync an end leaf directory (this 
> > > has about 4 
> > > > > > > > > dirs and 100
> > > > > > > > > files in each) the operation takes about 10 
> > > seconds. When I 
> > > > > > > > > go one level
> > > > > > > > > above (1000 dirs with about 4 dirs in each 
> with about 100 
> > > > > > > > > files in each)
> > > > > > > > > the operation takes about 10 minutes.
> > > > > > > > >  
> > > > > > > > > Now, if I then go one level above that (that's 1000 
> > > > dirs with 
> > > > > > > > > 1000 dirs
> > > > > > > > > in each with about 4 dirs in each with about 
> 100 files in 
> > > > > > > each) the
> > > > > > > > > operation takes days! Top shows glusterfsd 
> takes 300-600% 
> > > > > > > cpu usage
> > > > > > > > > (2X4core), I have about 48G of memory (usage is 0% as 
> > > > > expected).
> > > > > > > > >  
> > > > > > > > > Has anyone seen anything like this? How can I 
> speed it up?
> > > > > > > > >  
> > > > > > > > > Thanks,
> > > > > > > > >  
> > > > > > > > > Josh.
> > > > > > > > > 
> > > > > > > > _______________________________________________
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