From: Holger.VanKoll@SWISSCOM.COM
Date: Thu Feb 13 2003 - 10:41:45 EST
r u sure you produce more load than 8mbps?
try
dd </dev/rvpath-some-number >/dev/null bs=64k
and have a look at topas, iostat or nmon
-----Original Message-----
From: mounir.stambouli [mailto:mounir.stambouli@LAPOSTE.NET]
Sent: Thursday, February 13, 2003 4:32 PM
To: aix-l@Princeton.EDU
Subject: disk I/O throughput
Hello,
We've got an AIX 5.1 box with FC adapters directly connected
to ESS FC ports (no SAN). The theoretical throughput is 100+ MBPS but nmon reports that we're getting no more than 8 MBPS !!! I have paste the output of lsattr of various devices. ESS volumes are configured as RAID5 seen through 2 paths for each vpath.
Is there any additional config to be done ?
Where should I look on the ESS ?
Thanks in advance,
Mounir
U62CTSM001:/ lsattr -El fcs0
bus_intr_lvl 51 Bus interrupt
level False
intr_priority 3 Interrupt
priority False
bus_io_addr 0xec00 Bus I/O
address False
bus_mem_addr 0xe0020000 Bus memory
address False
lg_term_dma 0x200000
N/A True
max_xfer_size 0x1000000 Maximum Transfer
Size True
num_cmd_elems 1024 Maximum number of COMMANDS to queue
to the adapter True
pref_alpa 0x1 Preferred
AL_PA True
sw_fc_class 2 FC Class for
Fabric True
init_link al INIT Link
flags True
U62CTSM001:/ lsattr -El fscsi0
scsi_id 0x1 Adapter SCSI ID False
attach al How this adapter is CONNECTED False
sw_fc_class 3 FC Class for Fabric True
U62CTSM001:/ lsattr -El hdisk13
scsi_id 0xef N/A
True
lun_id 0x5029000000000000 N/A
True
location N/A
True
ww_name 0x5005076300c68efe N/A
False
pvid none Physical volume identifier
False
q_type simple Queuing TYPE
True
queue_depth 20 Queue DEPTH
True
start_timeout 180
eout 60 READ/WRITE time out value
True
Accédez au courrier électronique de La Poste : www.laposte.net ; 3615 LAPOSTENET (0,13 €/mn) ; tél : 08 92 68 13 50 (0,34€/mn)"
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 22:16:35 EDT