[Xen-devel] MYSQL bechmark results on XEN and LVM2 and GNBD

["Fajar A. Nugraha" <fajar@xxxxxxxxxxxx>]

Hi,

I'm using Xen 2.0.3 with LVM2 as root for domain-0 and dom-U, and also 
another dom-U on gnbd.
Kernel 2.6.10, custom config (kernel debug disabled), processor specific 
(Athlon).
Benchmark use official Mysql binary (static .tar.gz from mysql.com) and 
sysbench (http://sysbench.sourceforge.net/) OLTP test.
On the same physical server :

Domain-0, LVM2, 128MB memory
OLTP test statistics:
   queries performed:
       read:                            140070
       write:                           40012
       other:                           20005
       total:                           200087
   transactions:                        10000  (111.09 per sec.)
   deadlocks:                           5      (0.06 per sec.)
   read/write requests:                 180082 (2000.53 per sec.)
   other operations:                    20005  (222.24 per sec.)

Domain-1, LVM2, 128MB memory
OLTP test statistics:
   queries performed:
       read:                            140070
       write:                           40012
       other:                           20005
       total:                           200087
   transactions:                        10000  (78.98 per sec.)
   deadlocks:                           5      (0.04 per sec.)
   read/write requests:                 180082 (1422.30 per sec.)
   other operations:                    20005  (158.00 per sec.)

Domain-1, GNBD, 128MB memory
OLTP test statistics:
   queries performed:
       read:                            140000
       write:                           40000
       other:                           20000
       total:                           200000
   transactions:                        10000  (41.98 per sec.)
   deadlocks:                           0      (0.00 per sec.)
   read/write requests:                 180000 (755.68 per sec.)
   other operations:                    20000  (83.96 per sec.)

I understand the fact that GNBD is slower than LVM2, but is Dom-U supposed
to be that much slower compared to Dom-0?

Regards,

Fajar


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