HI Gea,
Great info, are you seeing 1000MB/s doing iperf or actually transfer rates  
rsync, cp bbcp….


> On Sep 16, 2016, at 12:57 PM, Guenther Alka <a...@hfg-gmuend.de> wrote:
> 
> I have made some investigations into 10G and found that 300-400MB/s is 
> expected with default settings. Improvements are possible up to 1000MB/s via 
> mtu 9000 and if you increase ip buffers ex
> max_buf=4097152 tcp
> send_buf=2048576 tcp
> recv_buf=2048576 tcp,
> 
> NFS lockd servers (ex 1024), NFS number of threads (ex 64) and NFS transfer 
> size (ex 1048576)
> 
> http://napp-it.org/doc/downloads/performance_smb2.pdf
> 
> 
> Gea
> 
> Am 16.09.2016 um 19:43 schrieb Ergi Thanasko:
>> Hi all,
>> We have a a few servers  conected via 10g nic  LACP, some of them have  4nic 
>> and some have 6nic in a link aggregation mode. We been moving a lot of data 
>> around and we are trying to get the maximum performance. I have seen zpool 
>> can deliver  2-3GB accumulated  throughput. Iperf does about 600-800MB/sec 
>> between those two servers.
>> Given  the hardware that we have and the zpool performance,   we expected   
>> to see some serious data transfer rates  however we only see around 
>> 200-300MB/sec average  using rsync or copy paste over NFS.  Standard MTU 
>> 1500 and nfs block size.  I want to ask the community what to do get some 
>> higher throughout and the application level. I hear ZFS send/receive   or 
>> ZFS shadow does work faster but it does snapshots. Out data (Terabytes) is 
>> constantly evolving   and we prefer something in the nature of rsync  but to 
>> utilize the network hardware.
>> 
>> If Anyone has a hardware setup that can see 1GB/sec  throughput  and does 
>> not mind sharing?
>> Any software  that  use multithreads  sessions to move data around  zfs 
>> friendly? We do not mind getting going with a commercial solution like 
>> camvault or veeam if they work.
>> 
>> Thank you for your time
>> 
>>  
>> 
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