Re: [MooseFS-Users] Linux vs FreeBSD

[<ba...@na...>]

Hi again!

OK. I'v made test file size twice bigger and no changes.
I'v launched dd several times and I have a stable results like this:

Linux # dd if=/moosefs/mnt/random_test_data of=/dev/null bs=1G
155 857 747 968 bytes (156 GB, 145 GiB) copied, 595.506 s, 262 MB/s

FreeBSD: # dd if=/moosefs/mnt/random_test_data of=/dev/null bs=1G
155 857 747 968 bytes transferred in 296.450686 secs (525 745 951 bytes/sec)

Cluster consists of 3 chunk server each with 64 GB RAM. And Linux client is one of them.
FreeBSD host has 48 GB RAM. All hosts have mtu 9000.

WBR
Alexander

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From: Aleksander Wieliczko <aleksander.wieliczko@mo...> - 2018-08-21 10:35:48

Every thing is possible, but try execute test 5 times, than remove
highest and lowest results and count average value from 3 results that
left :)
Good idea is to read file size twice big as your RAM amount.

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>> Hi dear All !
>> 
>> 
>> As far as I can see MooseFS client on FreeBSD works faster then on Linux:
>> 
>> # uname -a
>> FreeBSD 11.1-RELEASE-p13 FreeBSD 11.1-RELEASE-p13 #0: Tue Aug 14 19:34:21 UTC 2018 ro...@am...:/usr/obj/usr/src/sys/GENERIC amd64
>> # dd if=/moosefs/mnt/random_test_data of=/dev/null bs=1G
>> 77928873984 bytes transferred in 143.082525 secs (544642847 bytes/sec)
>> 
>> vs
>> 
>> # uname -a
>> Linux 4.9.0-7-amd64 #1 SMP Debian 4.9.110-3+deb9u2 (2018-08-13) x86_64 GNU/Linux
>> # dd if=/moosefs/mnt/random_test_data of=/dev/null bs=1G
>> 77928873984 bytes (78 GB, 73 GiB) copied, 258.288 s, 302 MB/s
>> 
>> 
>> All MooseFS involved hosts are connected via 10 Gigabit Ethernet.
>> 
>> 
>> Am I right? Why!?
>> 
>> 
>> WBR
>> 
>> Alexander
>> 
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> ------------------------------------------------------------------------------
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