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Hi, I need some help with NFSv4 setup/tuning. I have a dedicated nfs server (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x 8TB HDD) used by two servers and a small cluster (400 cores). All the servers are running CentOS 7, the cluster is running CentOS6. Time to time on the server I get: ?kernel: NFSD: client xxx.xxx.xxx.xxx testing state ID with incorrect cl...

hi, --> i have 8cores cpu. but my xenserver is using only one cpu, how to make use of all cpu cores --> machine is having 16G ram but domain0 is having very less memory. is there any way to increase memory for domain0 [root@xenserver-DZONGRI ~]# cat /proc/meminfo MemTotal: 574464 kB MemFree: 111776 kB...

Le 13/05/2020 ? 02:13, Orion Poplawski a ?crit?: > On 5/12/20 2:46 AM, Patrick B?gou wrote: >> Hi, >> >> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >> 8TB HDD) used by two servers and a small cluster (400 cores). All the >> servers are running CentOS 7, the cluster is running CentOS6. >> >> Time to time on the server I get: >> >> ???? ?kernel: NFSD: client x...

Le 12/05/2020 ? 16:10, James Pearson a ?crit?: > Patrick B?gou wrote: >> >> Hi, >> >> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >> 8TB HDD) used by two servers and a small cluster (400 cores). All the >> servers are running CentOS 7, the cluster is running CentOS6. >> >> Time to time on the server I get: >> >> ????? kernel: NFSD: client x...

.../05/2020 ? 07:32, Simon Matter via CentOS a ?crit?: >> Le 12/05/2020 ? 16:10, James Pearson a ?crit?: >>> Patrick B?gou wrote: >>>> Hi, >>>> >>>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >>>> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >>>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>>> servers are running CentOS 7, the cluster is running CentOS6. >>>> >>>> Time to time on the server I get: >>>&g...

...d, iodepth=64, bs=4K, jobs=N) is run inside VM to >> verify the improvement. >> >> I just create a small quadcore VM and run fio inside the VM, and >> num_queues of the virtio-blk device is set as 2, but looks the >> improvement is still obvious. The host is 2 sockets, 8cores(16threads) >> server. >> >> 1), about scalability >> - jobs = 2, thoughput: +33% >> - jobs = 4, thoughput: +100% >> >> 2), about top thoughput: +39% >> >> So in my test, even for a quad-core VM, if the virtqueue number >> is increased from...

...d, iodepth=64, bs=4K, jobs=N) is run inside VM to >> verify the improvement. >> >> I just create a small quadcore VM and run fio inside the VM, and >> num_queues of the virtio-blk device is set as 2, but looks the >> improvement is still obvious. The host is 2 sockets, 8cores(16threads) >> server. >> >> 1), about scalability >> - jobs = 2, thoughput: +33% >> - jobs = 4, thoughput: +100% >> >> 2), about top thoughput: +39% >> >> So in my test, even for a quad-core VM, if the virtqueue number >> is increased from...

...: >>>> Le 12/05/2020 ? 16:10, James Pearson a ?crit : >>>>> Patrick B?gou wrote: >>>>>> Hi, >>>>>> >>>>>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >>>>>> (2 x E5-2620 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >>>>>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>>>>> servers are running CentOS 7, the cluster is running CentOS6. >>>>>> >>>>>> Time to time on...

...B?gou wrote: >> Le 13/05/2020 ? 02:13, Orion Poplawski a ?crit?: >>> On 5/12/20 2:46 AM, Patrick B?gou wrote: >>>> Hi, >>>> >>>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs >>>> server >>>> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and >>>> 16x >>>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>>> servers are running CentOS 7, the cluster is running CentOS6. >>>> >>>> Time to time on the server I ge...

Patrick B?gou wrote: > > Hi, > > I need some help with NFSv4 setup/tuning. I have a dedicated nfs server > (2 x E5-2620 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x > 8TB HDD) used by two servers and a small cluster (400 cores). All the > servers are running CentOS 7, the cluster is running CentOS6. > > Time to time on the server I get: > > kernel: NFSD: client xxx.xxx.xxx.xxx testing...

> Le 12/05/2020 ? 16:10, James Pearson a ?crit?: >> Patrick B?gou wrote: >>> >>> Hi, >>> >>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >>> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>> servers are running CentOS 7, the cluster is running CentOS6. >>> >>> Time to time on the server I get: >>> >>> ????...

On 5/12/20 2:46 AM, Patrick B?gou wrote: > Hi, > > I need some help with NFSv4 setup/tuning. I have a dedicated nfs server > (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x > 8TB HDD) used by two servers and a small cluster (400 cores). All the > servers are running CentOS 7, the cluster is running CentOS6. > > Time to time on the server I get: > > ?kernel: NFSD: client xxx.xxx.xxx.xxx testing...

On 6/1/20 3:08 AM, Patrick B?gou wrote: > Le 13/05/2020 ? 02:13, Orion Poplawski a ?crit?: >> On 5/12/20 2:46 AM, Patrick B?gou wrote: >>> Hi, >>> >>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >>> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>> servers are running CentOS 7, the cluster is running CentOS6. >>> >>> Time to time on the server I get: >>> >>> ???...

...Matter via CentOS a ?crit?: >>> Le 12/05/2020 ? 16:10, James Pearson a ?crit?: >>>> Patrick B?gou wrote: >>>>> Hi, >>>>> >>>>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >>>>> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >>>>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>>>> servers are running CentOS 7, the cluster is running CentOS6. >>>>> >>>>> Time to time on the server I get...

...Fio(libaio, randread, iodepth=64, bs=4K, jobs=N) is run inside VM to > verify the improvement. > > I just create a small quadcore VM and run fio inside the VM, and > num_queues of the virtio-blk device is set as 2, but looks the > improvement is still obvious. The host is 2 sockets, 8cores(16threads) > server. > > 1), about scalability > - jobs = 2, thoughput: +33% > - jobs = 4, thoughput: +100% > > 2), about top thoughput: +39% > > So in my test, even for a quad-core VM, if the virtqueue number > is increased from 1 to 2, both scalability and performanc...

..., jobs=N) is run inside VM to >>> verify the improvement. >>> >>> I just create a small quadcore VM and run fio inside the VM, and >>> num_queues of the virtio-blk device is set as 2, but looks the >>> improvement is still obvious. The host is 2 sockets, 8cores(16threads) >>> server. >>> >>> 1), about scalability >>> - jobs = 2, thoughput: +33% >>> - jobs = 4, thoughput: +100% >>> >>> 2), about top thoughput: +39% >>> >>> So in my test, even for a quad-core VM, if the virtque...

...epends on x-data-plane. Fio(libaio, randread, iodepth=64, bs=4K, jobs=N) is run inside VM to verify the improvement. I just create a small quadcore VM and run fio inside the VM, and num_queues of the virtio-blk device is set as 2, but looks the improvement is still obvious. The host is 2 sockets, 8cores(16threads) server. 1), about scalability - jobs = 2, thoughput: +33% - jobs = 4, thoughput: +100% 2), about top thoughput: +39% So in my test, even for a quad-core VM, if the virtqueue number is increased from 1 to 2, both scalability and performance can get improved a lot. In above qemu implem...

...epends on x-data-plane. Fio(libaio, randread, iodepth=64, bs=4K, jobs=N) is run inside VM to verify the improvement. I just create a small quadcore VM and run fio inside the VM, and num_queues of the virtio-blk device is set as 2, but looks the improvement is still obvious. The host is 2 sockets, 8cores(16threads) server. 1), about scalability - jobs = 2, thoughput: +33% - jobs = 4, thoughput: +100% 2), about top thoughput: +39% So in my test, even for a quad-core VM, if the virtqueue number is increased from 1 to 2, both scalability and performance can get improved a lot. In above qemu implem...

...Le 12/05/2020 ? 16:10, James Pearson a ?crit : >>>>>> Patrick B?gou wrote: >>>>>>> Hi, >>>>>>> >>>>>>> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >>>>>>> (2 x E5-2620 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >>>>>>> 8TB HDD) used by two servers and a small cluster (400 cores). All the >>>>>>> servers are running CentOS 7, the cluster is running CentOS6. >>>>>>> >>>>>>>...

...ary host. Both machines are located at Hetzner in Germany. HostA is in DC6 and HostB is in DC12. Not situated next to eachother but low latency links between them. Both machines are connected to gbit uplinks and are not very highly loaded. The machines consist of 2x2TB disk (mirrored with ZFS) and 8cores, 32GB RAM. There were warnings when manually doing the sync that the mailbox changed in between and should be reissued, after which the mailboxes kept growing. Previously I reported two messages here which might be the foundation of the same issue: https://dovecot.org/list/dovecot/2016-July/10487...