[Ocfs2-users] Large Files Hang Server

[Sunil Mushran]

Repeat the same test but with volumes mounted with data=writeback
mount option.

mount -o data=writeback /dev/sdX /path

On 05/24/2011 07:11 AM, Keith W wrote:
> Hello list.
> Apologies in advance, this may be a bit long. Just trying to give
> as much info as I can at the outset.
>
> I have a two node setup that share a 500Gig SAS drive via ocfs2.
> When I move either large files 300Megs+ or a large number of smaller files
> onto or off of the volume, my terminal session will hang and if I do a
> directory listing in another terminal while doing a file transfer that
> terminal will hang as well.
>
> The only thing I can see that is not "typical" is that I had to change
> the port to 8888 due to another application running on 7777.
>
>
> Here is my configuration:
> ------------------------
> Oracle Enterprise Linux 5.5 (Oracle Updated Kernel 2.6.18-194.0.0.0.3.el5)
> OCFS2 Version 1.4.4
> GigE Interconnect
> SaS Connection to the drive.
>
>
> cluster.conf:
> -------------
> cluster:
>          node_count = 2
>          name = HobCluster
> node:
>          ip_port = 8888
>          ip_address = 192.168.0.1
>          number = 0
>          name = hoban1
>          cluster = HobCluster
> node:
>          ip_port = 8888
>          ip_address = 192.168.0.2
>          number = 1
>          name = hoban2
>          cluster = HobCluster
>
>
>
> /etc/sysconfig/o2cb:
> -------------------
> O2CB_ENABLED=true
> O2CB_STACK=o2cb
> O2CB_BOOTCLUSTER=HobCluster
> O2CB_HEARTBEAT_THRESHOLD=
> O2CB_IDLE_TIMEOUT_MS=
> O2CB_KEEPALIVE_DELAY_MS=
> O2CB_RECONNECT_DELAY_MS=
>
>
> Status:
> --------
> [root at hoban1 u03]# /etc/init.d/o2cb status
> Driver for "configfs": Loaded
> Filesystem "configfs": Mounted
> Driver for "ocfs2_dlmfs": Loaded
> Filesystem "ocfs2_dlmfs": Mounted
> Checking O2CB cluster HobCluster: Online
> Heartbeat dead threshold = 31
>    Network idle timeout: 30000
>    Network keepalive delay: 2000
>    Network reconnect delay: 2000
> Checking O2CB heartbeat: Active
>
>
>
> Additional Info:
> ---------------
> While transfering a large file I do an ls -l on any file within
> the /u03(ocfs2) directory it goes quickly as expected.
>
> [root at hoban2 u03]# time ls -l asdf
> -rw-r--r-- 1 root root 0 May 23 08:23 asdf
>
> real	0m0.003s
> user	0m0.000s
> sys	0m0.003s
>
>
> During a large file transfer, a ls -l on the file being transfered
> hangs for a very long time.
> [root at hoban2 u03]# time ls -l
> total 547340
> -rw-r--r-- 1 root   root             0 May 23 08:23 asdf
> -rw-r--r-- 1 root   root     560476160 May 24  2011 Enterprise-R5-U5-x86_64.iso
> drwxr-xr-x 2 root   root          3896 May 22 09:29 lost+found
> drwxr-xr-x 3 oracle oinstall      3896 May 23 14:32 oracle
>
> real	0m5.552s
> user	0m0.000s
> sys	0m0.004s
>
> Once the file has completed it's transfer, the ls works just fine and
> nothing hangs. On occasion both terminal sessions will lock and need to
> be killed, the file never completing it's transfer.
>
> Any suggestions are greatly appreciated.
>
> +-------------------------------+
> +	      Keith		+
> +-------------------------------+
>
>
>
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