hello, to everybody.
currently I build up following infrastructure on vmware vsphere 5.1 Enterprise... the following is given:
hardware:
- 7x hp DL 380 g7 server with 2 sockets cpu and in each case 192 GB ram.
- every server is equipped with 12 network cards.
- as storage is used a netapp 2240-2 with 2 controllers and 24 hard disks.
- the netapp is equipped with a mezzanine card per controller. thereby 2x 10gb nics are available per controller.
- the 10gb nics on the netapp are bundled up as a virtual interface on each controller.
- used switches are cisco ws c3750x 24. these are also equipped with 10gb modules.
- the cisco switch model is certificated from netapp. the cable connection from storage to switch is offered about netapp directly.
software:
- each hp server is installed with vmware esxi 5.1 release 799733.
- the esxi installation file is from hp with the drivers from the server compiled in it.
- the netapp has the data ontap release 8.1.1P1 7-mode
- we use software iscsi hba on the esx server
now the big problem:
- i converted some physical servers through vmware converter to the the vm infrastructure.
- some servers are running ms sql server und oracle on it.
- the problem is now, that the storage i/o traffic over iscsi is now slower then before.
- im posting screenshots from iometer in the posting.
virtual networking in vcenter is built up as follows:
- four nics from a server in the vm cluster sends the storage traffic to the cisco switch.
- the cisco sends the traffuc about his 10gb nic modules further to the netapp.
- i've use the howtos to build iscsi multipathing von the vswtich, that sends the storage traffic to the netapp.
- the virtual machine vmdk's are stored in one big aggregate on the netapp.
- the aggregate is splitted in three volumes (one for the netapp wafl system and two for vm data).
- the two data volumes has each one lun in it, where the vmdks are stored.
now i'm experimenting with the vmware best practice guide "oracle databases on vmware". interesting is, that my performance is the same bad on each server and virtual machine.
it's not the matter, if the virtual machine is with ms sql, oracle or just a windows 2008 server with nothing on it. iometer still brings bad results on the 4k blocks read and write.
now the question in here ist, what is wrong ?
many thanks for a solution
marc