Re: Open iSCSI Performance on IBM

2009-04-14 Thread Gonçalo Borges
Unfortunately not. I'm now trying to optimize some filesystem options to check if that increases performance... but from the iscsi part, I do not know what else to optimize. I could be reaching the physical limit of the system but I'm not sure since I do not know about any other performance number

RE: Open iSCSI Performance on IBM

2009-04-13 Thread Simone Morellato
ristie > > Sent: Thursday, April 09, 2009 10:55 AM > > To: open-iscsi@googlegroups.com > > Subject: Re: Open iSCSI Performance on IBM > > > > > > Gonçalo Borges wrote: > > > Hi All... > > > > > > Sorry, the following could be a little bi

RE: Open iSCSI Performance on IBM

2009-04-13 Thread Simone Morellato
m > Subject: Re: Open iSCSI Performance on IBM > > > Gonçalo Borges wrote: > > Hi All... > > > > Sorry, the following could be a little bit off topic... > > > > Does any one has an idea of what is the expected performance for a IBM > > DS 3300 system c

Re: Open iSCSI Performance on IBM

2009-04-13 Thread jnantel
Have you made any headway with this issue? I'm having a write issue that seems to share some similarities with yours. On Apr 13, 8:14 am, Gonçalo Borges wrote: > Hi... > > > Is /apoio04/b1 a scsi/iscsi disk or is it LVM/DM/RAID on top of a > > iscsi/scsi disk? > > /apoio04/ is a RAID1 of two dis

Re: Open iSCSI Performance on IBM

2009-04-13 Thread Gonçalo Borges
Hi... > Is /apoio04/b1 a scsi/iscsi disk or is it LVM/DM/RAID on top of a > iscsi/scsi disk? /apoio04/ is a RAID1 of two disks accessible via iscsi (in the following tests, I changed the mount point from /apoio04/ to /iscsi04- lun0/ but they are exactly the same). > > Could you set the IO sc

Re: Open iSCSI Performance on IBM

2009-04-09 Thread Mike Christie
Gonçalo Borges wrote: > Hi All... > > Sorry, the following could be a little bit off topic... > > Does any one has an idea of what is the expected performance for a IBM > DS 3300 system connected via open iSCSI? Using a RAID 1 with 2 disks, > I got the following numbers: > Is /apoio04/b1 a scs

Re: Open iSCSI Performance on IBM

2009-04-09 Thread Gonçalo Borges
Basically, I want to have an idea of the performance other admins are getting... The hardware is not so important since I'm interested in the order of magnitude of the performance rates... On Apr 9, 10:22 am, Gonçalo Borges wrote: > > What is the write performance if you do RAID0 instead of RAID

Re: Open iSCSI Performance on IBM

2009-04-09 Thread Gonçalo Borges
> What is the write performance if you do RAID0 instead of RAID1? Basically 30MB/s, i.e., twice the value I get in a RAID1. > Also, you can use 'direct' I/O flag with "dd" command. I'll try using this one! Thanks and cheers Goncalo --~--~-~--~~~---~--~~ You re

Re: Open iSCSI Performance on IBM

2009-04-09 Thread malahal
What is the write performance if you do RAID0 instead of RAID1? I don't have that hardware and I can't verify anything though. Also, you can use 'direct' I/O flag with "dd" command. Thanks, Malahal. Gon?alo Borges [borges.gonc...@gmail.com] wrote: > > Hi All... > > Sorry, the following could b

Open iSCSI Performance on IBM

2009-04-09 Thread Gonçalo Borges
Hi All... Sorry, the following could be a little bit off topic... Does any one has an idea of what is the expected performance for a IBM DS 3300 system connected via open iSCSI? Using a RAID 1 with 2 disks, I got the following numbers: Sequential Write: [r...@core12 ~]# dd if=/dev/zero of=/ap