search for: ping_pong

I was testing ocfs2 on a 2 node cluster set up. ocfs2-tools version is 1.6.3 ocfs2 kernel version is 2.6.36 Using cman on 2 nodes node02 dw # ping_pong -rwm /data/test.dat 3 data increment = 2 14 locks/sec node01 dw # ping_pong -rw /data/test.dat 3 data increment = 2 10 locks/sec node02 dw # ping_pong -r /data/test.dat 3 1980 locks/sec Using cman on 1 node node02 dw # ping_pong -rwm /data/test.dat 3 data increment = 1 3165...

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...I > did wonder if there was any help that you kind chaps might be able > to give to the MooseFS guys if they need it (they've not asked yet > but I've suggested they might be able to). Overall it's working The main hint I would like to give to the MooseFS developers is to get ping_pong -rw working. If you need any assistance in setting that up and getting arguments on why this is important, let us know! With best regards, Volker

...files. If you still > find tdb files used on MooseFS, you should investigate your > configuration and modify it such that tdb files only exist on local > file systems. > > Volker Hi Volker, There are *no* more tdb files on MooseFS, that's what I'm trying to test. From the ping_pong wiki page it's instructed to use "use_mmap = no" if the ping_pong test does not work correctly on "ping_ping -m -rw test.file", which it did, completely. Text here: " Testing mmap coherence If you add the -m switch to ping_pong along with -rw then it will do th...

On Thu, Jul 14, 2016 at 02:39:48PM +0100, Alex Crow wrote: > >The main hint I would like to give to the MooseFS developers is to get > >ping_pong -rw working. If you need any assistance in setting that up > >and getting arguments on why this is important, let us know! > > > >With best regards, > > > >Volker > > Any arguments that I can pass on would be much appreciated. The main argument is that Windows...

Hi, I'd like to set up a HA Samba server that serves out data from NFS mounts​. I was thinking that CTDB was the thing to do use but it is only mentioned with serving clustered file systems like Gluster, Lustre, etc. Is there a way to set up a HA Samba server without a clustered file system? ​Thanks, Steve​

...ck file), I'm still worried what these failures mean: 1) does the -rw (without -m) test suggest any problems with the MooseFS FS I'm serving files to users from? 2) does the mmap test failure mean I should not even have my CTDB lock file on MooseFS? 3) Do the inconsistent reports from a ping_pong -rw test show there is a major problem with MooseFS as the underlying FS for Samba exports and something needs to be done with the underlying FS? I'm a paying licensee of MooseFS Pro, so I hope you can understand my wishes to get this problem sorted. If contracting some of the Sernet chaps...

Hi, We've had a strange issue after following the recommendations at https://wiki.samba.org/index.php/Ping_pong, particularly the part about mmap coherence. We are running CTDB/Samba over a MooseFS clustered FS, and we'd not done the ping-pong before. After finding that the mmap coherence test did not pass, we changed "use mmap" to "no" in smb.conf. This morning as users began to...

...MBytes/sec and 2.8 MBytes/sec If I add more clients by increasing the --num-progs-parameter rates drop further down. On one node probably the master I see that all three (virtual) CPU core have a system load of 60% (from top). The other three nodes do not show any high CPU load. I also ran the ping_pong test (ping_pong /shared/cluster/test.dat 5) on the shared filesystem. On one node I get a value of about 36000. If I run the very same ping_pong-command on all four nodes I get a value of 1000 on each node. On our old samba servers we have a total of about 400 connects distributed on two servers....

...ivate dir" on the cluster FS was a bad idea, that disabling that would stop all tdb files being written to the MooseFS FS, and that would be the solution. My understanding was the "use mmap" affected general FS operations from clients, not just tdb files. > >> From the ping_pong wiki page it's instructed to use "use_mmap = no" if > As I sad in an earlier mail: The wiki page is wrong. If you don't trust > one of the primary developers of Samba and to a lesser extent ctdb > (myself, sorry for bragging) and trust the wiki more, then I am a bit >...

On 14/07/16 14:51, Volker Lendecke wrote: > On Thu, Jul 14, 2016 at 02:39:48PM +0100, Alex Crow wrote: >>> The main hint I would like to give to the MooseFS developers is to get >>> ping_pong -rw working. If you need any assistance in setting that up >>> and getting arguments on why this is important, let us know! >>> >>> With best regards, >>> >>> Volker >> Any arguments that I can pass on would be much appreciated. > The main argum...

On 04/07/16 20:39, Volker Lendecke wrote: > On Mon, Jul 04, 2016 at 04:58:35PM +0100, Alex Crow wrote: >> • Add the following lines to the [global] section of your Samba >> configuration >> clustering = yes >> idmap backend = tdb2 >> private dir = /gluster/lock >> >> Can you confirm that "private dir" does *not* have to be set in smb.conf to

...notice, as clients wouldn't be able to talk to ctdb at all. > > -slow I can confirm this made no difference. I see the locking working from windows between the first two servers but *not* the third. This seems to match what I had with smbclient. Again, could it be that an FS that passes ping_pong not be able to work in a CTDB cluster? The developers of my fs (MooseFS) have said that while file flock() is working perfectly there is still no directory flock. Could that be a pointer? Cheers, Alex -- This message is intended only for the addressee and may contain confidential information. Un...

...r if there was any help that you kind chaps might be able >> to give to the MooseFS guys if they need it (they've not asked yet >> but I've suggested they might be able to). Overall it's working > The main hint I would like to give to the MooseFS developers is to get > ping_pong -rw working. If you need any assistance in setting that up > and getting arguments on why this is important, let us know! > > With best regards, > > Volker Hi Volker, Any arguments that I can pass on would be much appreciated. I've also had a try with RozoFS, which did not wor...

...it you aren't protected against your cluster being partitioned (a.k.a. split brain). From Samba >= 4.5, CTDB will support a configurable helper to handle the recovery lock. If you can satisfy these requirements then you're good to go... the important thing is to test... :-) The ping_pong tool can test a bunch of the necessary features: https://wiki.samba.org/index.php/Ping_pong Good luck... peace & happiness, martin

...rtunately non of the suggestion's helped. My current setup, Glusterfs on ZFS, CTDB installed but running into "Permission denied" error in regards to the lock file. What did I tried/tested: - Mounting the gluster volume with option --direct-io-mode=enable - ping_pong -rw /gluster/lock/lock 3 (result when starting on second note:data increment is changing from 1 to 2 - changing lock file locatin. Moving it to the root of the gluster share. I appreciate any help to get this up and running. Please see below list of installed packages centos-rel...

Hi, I'm trying to get more performance out of my DRBD cluster with gfs2. It seems that our gfs2 implementation is quit slow. When running the ping_pong test we get no more than a 1000 locks/sec on the disk. ./ping_pong /mnt/backup/test.dat 4 879 locks/sec The cluster config has been updated with: <dlm plock_ownership="1" plock_rate_limit="0"/> <gfs_controld plock_rate_limit="0"/> gfs2_too...

...data for breakfast. > >Gluster was there loooong ago, and they fixed it before becoming a > >viable storage solution for Samba. > > > >Volker > > MooseFS does not ask for mmap coherence. It has inconsistent results > on a plain -rw test. MooseFS needs to fix that. ping_pong with -rw is pretty basic Posix stuff. Admittedly it seems to be very hard for cluster file systems to implement, but it is essential if you want to provide Posix semantics. Samba and SMB clients depend on this. SMB clients coordinate via byte range locks, and data coherence coordinated by those loc...

...at > these failures mean: > > 1) does the -rw (without -m) test suggest any problems with the > MooseFS FS I'm serving files to users from? > 2) does the mmap test failure mean I should not even have my CTDB lock > file on MooseFS? > 3) Do the inconsistent reports from a ping_pong -rw test show there is > a major problem with MooseFS as the underlying FS for Samba exports > and something needs to be done with the underlying FS? > > I'm a paying licensee of MooseFS Pro, so I hope you can understand my > wishes to get this problem sorted. If contracting s...

...your > > configuration and modify it such that tdb files only exist on local > > file systems. > > > > Volker > > There are *no* more tdb files on MooseFS, that's what I'm trying to test. Why are you still using "use mmap = no" then? > From the ping_pong wiki page it's instructed to use "use_mmap = no" if As I sad in an earlier mail: The wiki page is wrong. If you don't trust one of the primary developers of Samba and to a lesser extent ctdb (myself, sorry for bragging) and trust the wiki more, then I am a bit lost, sorry. >...