Hi Pieter, We are considering Linux on z9, and I noticed you mentioning the overhead of VSWITCH LACP - which we are planning to use. Do you have some detailed information on this overhead? Is it affected by SET PORT GROUP INTERVAL ? Any information would be gratefully received :-)
John Zarzeck -----Original Message----- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Harder, Pieter Sent: 01 May 2009 10:50 To: LINUX-390@VM.MARIST.EDU Subject: Re: TSM Server on Linux on Z Anyone? Hi Lee, >Is anyone running a TSM server (not client) on Linux on Z? Any observations? Yes, we are. Using a DS8300 for disk storage, a TS3500/LTO3 for primary tape pools and a TS3310/LOT4 for copy pools and a 4x GbE LACP OSA bundle. It is a completely automated environment with the two tape libraries at different locations. We are moving around 5TB of incoming client backups a day. For attaching the I/O we use 6x FCP 4Gb and could use more in the near future. I agree with David lots of cpu is involved. In our case something like 1,5 z9 BC IFL for most of the day. The main problem there is the inefficiency of TCP/IP communication, not the TSM system per se or the FCP based I/O. I have spent several bouts with Rob vd Heij of Velocity trying to improve on the communication. Our last change was abandoning the LACP VSWITCH for native LACP bonding within the Linux guest due to the very large overhead of the VSWITCH. Feel free to ask if you want to know more details. Best regards, Pieter Harder pieter.har...@brabantwater.nl tel +31-73-6837133 / +31-6-47272537 Brabant Water N.V. Postbus 1068 5200 BC 's-Hertogenbosch http://www.brabantwater.nl Handelsregister: 16005077 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 This e-mail and any attachments are confidential and intended solely for the addressee and may also be privileged or exempt from disclosure under applicable law. If you are not the addressee, or have received this e-mail in error, please notify the sender immediately, delete it from your system and do not copy, disclose or otherwise act upon any part of this e-mail or its attachments. Internet communications are not guaranteed to be secure or virus-free. The Barclays Group does not accept responsibility for any loss arising from unauthorised access to, or interference with, any Internet communications by any third party, or from the transmission of any viruses. Replies to this e-mail may be monitored by the Barclays Group for operational or business reasons. Any opinion or other information in this e-mail or its attachments that does not relate to the business of the Barclays Group is personal to the sender and is not given or endorsed by the Barclays Group. Barclays Bank PLC.Registered in England and Wales (registered no. 1026167). Registered Office: 1 Churchill Place, London, E14 5HP, United Kingdom. Barclays Bank PLC is authorised and regulated by the Financial Services Authority. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
