[Samba] Am I getting the best performance?
aragonx at dcsnow.com
Fri Mar 14 02:59:18 GMT 2003
Okay, I've been chasing performance for a while now. I have no idea if I
should be trying to get better performance or if I'm getting all I can out
of my hardware. Here is the information:
/sbin/hdparm -I /dev/hdd
ATA device, with non-removable media
Model Number: ST328040A
Serial Number: 7BY034XB
Firmware Revision: 3.07
Supported: 4 3 2 1
Likely used: 5
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
CHS current addressable sectors: 16514064
LBA user addressable sectors: 55704096
device size with M = 1024*1024: 27199 MBytes
LBA, IORDY(can be disabled)
Buffer size: 512.0kB Queue depth: 1
Standby timer values: spec'd by Standard
R/W multiple sector transfer: Max = 16 Current = 16
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 *udma4
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
* READ BUFFER cmd
* WRITE BUFFER cmd
* Write cache
* Power Management feature set
* SMART feature set
* DOWNLOAD MICROCODE cmd
HW reset results:
CBLID- above Vih
Device num = 1
/sbin/hdparm -Tt /dev/hdd
Timing buffer-cache reads: 128 MB in 0.95 seconds =134.74 MB/sec
Timing buffered disk reads: 64 MB in 2.43 seconds = 26.34 MB/sec
multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 3684/240/63, sectors = 55704096, start = 0
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192
I'm running Redhat 8.0 using a custom built 2.4.20 kernel. The drive
referenced above is a Seagate 7200rpm UDMA-33 IDE hard drive.
I did a 2GB copy from
Linux to a Windows98SE machine using Samba. I got 5.85MB/sec.
I did the same copy on a Windows XP machine and got 6.99MB/sec.
Then I copied from hdd to hdc and got 6.94MB/sec. (same channel)
Then I copied from hdd to hdb and got 9.30MB/sec. (different channel)
It seems to me that I should be able to get close to the 9.30MB/sec when
transfering over the network.
Still 9.3MB/sec is no where near the 26MB/sec hdparm is reporting...
I'm on a 100Mb switch and I'm using 3Com 905TX NICs in both the workstation
and the server.
I guess the best my network can put out is 12MB/sec. I was hoping to get
around 10MB/sec with Samba. Is this unreasonable???
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