RVP a écrit :
> On Fri, 5 Feb 2021, BERTRAND Joël wrote:
>
>> But even if dd is done over block device, throughput is correct
>> without network.
>>
>
> What's the network throughput like when a client machine (eg.
> hilbert) reads/writes data on this exported sd1 target over agr0?
I haven't tried with sd1. But this NetBSD server exports swap
partitions for several disless workstations. For example, /dev/rdk1 as a
100 GB partition on ccd0 exported by istgt to hilbert :
legendre# ccdconfig -g
ccd0 32 0x0 2000408739840 /dev/wd0a /dev/wd1a
istgt config contains :
[Global]
Comment "Global section"
NodeBase "iqn.2020-02.fr.systella.legendre.istgt"
PidFile /var/run/istgt.pid
AuthFile /usr/pkg/etc/istgt/auth.conf
MediaDirectory /var/istgt
LogFacility "local7"
Timeout 30
NopInInterval 20
DiscoveryAuthMethod Auto
MaxSessions 256
MaxConnections 64
MaxR2T 256
MaxOutstandingR2T 16
DefaultTime2Wait 2
DefaultTime2Retain 60
FirstBurstLength 262144
MaxBurstLength 1048576
MaxRecvDataSegmentLength 262144
InitialR2T Yes
ImmediateData Yes
DataPDUInOrder Yes
DataSequenceInOrder Yes
ErrorRecoveryLevel 0
[UnitControl]
Comment "Internal Logical Unit Controller"
AuthMethod CHAP Mutual
AuthGroup AuthGroup10000
Portal UC1 127.0.0.1:3261
Netmask 127.0.0.1
[PortalGroup1]
Comment "legendre.systella.fr/agr0"
Portal DA1 192.168.10.128:3260
[InitiatorGroup1]
Comment "hilbert.systella.fr"
InitiatorName "ALL"
Netmask 192.168.10.103/32
[LogicalUnit1]
Comment "swap hilbert"
TargetName hilbert
TargetAlias "swap hilbert"
Mapping PortalGroup1 InitiatorGroup1
AuthMethod Auto
AuthGroup AuthGroup1
UseDigest Auto
UnitType Disk
LUN0 Storage /dev/rdk1 Auto
Hilbert runs with 32 GB and a Intel(R) Core(TM) i9-10900F. Operating
system is Linux/Debian (kernel 5.10.0-2-amd64). Legendre runs with
9.1_STABLE (CUSTOM). It runs with a customized kernel as it requires
ALTQ support. No other special option in kernel configuration.
Last evening, I have rebuild FreeCAD and whole KiCAD with make -j20
install. As seamonkey was running on this workstation (and eats a lot of
memory), system was swapping and I have seen that throughput from and to
rdk1 can raise up to 800 Mbps. Maybe a little more, and legendre's CPU
was not overleaded. Please note that there are in the same time three or
four other diskless workstations (FreeBSD, Linux and another NetBSD) on
the same network that use legendre as boot and nfs server.
> Can you do the read/write NAS dd test on legendre with all
> non-essential daemons (bacula, nfs, squid, postgres, ...) except
> iscsid turned off?
I have done some time ago, same result. I can open a ssh access if you
want to see legendre configuration.
Best regards,
JKB
