I have a server with 4GB of Memory, two Intel QuadCore Xeon CPUs and a LSI
FibreChannel 4GBit HBA Card connected to a SAN-Box.
When I install this with a normal Linux (CentOS 4.4) with kernel
2.6.9-42.0.3.ELsmp and the mptfc driver, which is deliverd with this kernel,
everything works fine.
I can copy a 600 MB file from one directory to an other on the same partition
in 6 seconds.
When I install on the same server a Xen-kernel (126.96.36.199-xen) with the mptfc
driver, which is deliverd with this kernel, the I/O performance to the SAN is
When I copy in a domU a 600 MB file from one directory to an other on the same
partition it take 90 seconds.
The config file for the disk in my domU is this:
disk = [ 'phy:/dev/OracleVG/OraAdmin10gR2,/dev/sda1,w',
The filesystem is ext3.
You can see that we would run Oracle 10g R2 in a Xen DomU.
We work with datafiles greater then 6GB.
Copy from a partiton to an other is ok.
Can anybody help us?
greetz from Krefeld,
Phone: 02131 - 153498
Fax: 02131 - 153499
Mobil: 0172 - 253 0523
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