Re: [ceph-users] mds0: Client failing to respond to cache pressure

On 15/07/15 04:06, Eric Eastman wrote: Hi John, I cut the test down to a single client running only Ganesha NFS without any ceph drivers loaded on the Ceph FS client. After deleting all the files in the Ceph file system, rebooting all the nodes, I restarted the create 5 million file test usin

Re: [ceph-users] mds0: Client failing to respond to cache pressure

I change the "mds_cache_size" to 50 from 10 get rid of the WARN temporary. Now dumping the mds daemon shows like this: "inode_max": 50, "inodes": 124213, But i have no idea if the "indoes" rises more than 50 , change the "mds_cache_size" again? Thanks. 2015-07-15 13

Re: [ceph-users] mds0: Client failing to respond to cache pressure

Hi John, I cut the test down to a single client running only Ganesha NFS without any ceph drivers loaded on the Ceph FS client. After deleting all the files in the Ceph file system, rebooting all the nodes, I restarted the create 5 million file test using 2 NFS clients to the one Ceph file system

Re: [ceph-users] mds0: Client failing to respond to cache pressure

Thanks John. I will back the test down to the simple case of 1 client without the kernel driver and only running NFS Ganesha, and work forward till I trip the problem and report my findings. Eric On Mon, Jul 13, 2015 at 2:18 AM, John Spray wrote: > > > On 13/07/2015 04:02, Eric Eastman wrote: >

Re: [ceph-users] mds0: Client failing to respond to cache pressure

On 13/07/2015 04:02, Eric Eastman wrote: Hi John, I am seeing this problem with Ceph v9.0.1 with the v4.1 kernel on all nodes. This system is using 4 Ceph FS client systems. They all have the kernel driver version of CephFS loaded, but none are mounting the file system. All 4 clients are usin

Re: [ceph-users] mds0: Client failing to respond to cache pressure

In the last email, I stated the clients were not mounted using the ceph file system kernel driver. Re-checking the client systems, the file systems are mounted, but all the IO is going through Ganesha NFS using the ceph file system library interface. On Sun, Jul 12, 2015 at 9:02 PM, Eric Eastman

Re: [ceph-users] mds0: Client failing to respond to cache pressure

Hi John, I am seeing this problem with Ceph v9.0.1 with the v4.1 kernel on all nodes. This system is using 4 Ceph FS client systems. They all have the kernel driver version of CephFS loaded, but none are mounting the file system. All 4 clients are using the libcephfs VFS interface to Ganesha NFS

Re: [ceph-users] mds0: Client failing to respond to cache pressure

Thank you John, All my server is ubuntu14.04 with 3.16 kernel. Not all of clients appear this problem, the cluster seems functioning well now. As you say,i will change the mds_cache_size to 50 from 10 to take a test, thanks again! 2015-07-10 17:00 GMT+08:00 John Spray : > > This is usuall

Re: [ceph-users] mds0: Client failing to respond to cache pressure

This is usually caused by use of older kernel clients. I don't remember exactly what version it was fixed in, but iirc we've seen the problem with 3.14 and seen it go away with 3.18. If your system is otherwise functioning well, this is not a critical error -- it just means that the MDS mig

[ceph-users] mds0: Client failing to respond to cache pressure

hi, I use CephFS in production environnement with 7osd,1mds,3mon now. So far so good,but i have a problem with it today. The ceph status report this: cluster ad3421a43-9fd4-4b7a-92ba-09asde3b1a228 health HEALTH_WARN mds0: Client 34271 failing to respond to cache pressure