Im sorry, but: What is going on here? I was sure, someone would give a statement about the real current state of PAV on Escon DASDs.
Are there still problems replying to posts? What I/O performance do you get, and how? At moment we are creating a concept with a combination of raid-striping and LVM concatenation to have parallel escon access to storage sub system and still have flexibility of growing filesystems on demand. Our biggest fs is about 120 GB ext3 on M9 in a LVM-concat. That means about 8 MB/s. Matching our zVM Network Speed (TCPIP+MPRoute). For fileservice no prob... But we have big performance problems on an 40GB fs (LVM, 10 Stripes on M9, 4 phys Escon) with an mySql-DB on it. Reorgs and even selects sometimes takes a lot of time. (Same on SCSI-Raid is double-performance) regards fs -----Ursprüngliche Nachricht----- Von: SCHWEDE, FRANK Gesendet: Freitag, 16. Juli 2004 16:22 An: 'Linux on 390 Port' Betreff: AW: Performance of large file systems I am sorry, I dont want to get that wrong: You are really using PAV since 4 years? You are able to access ONE Dasd parallel over multiple different escon channels at the same time? What I/O did you measure? We get 6-9 MB/sec with "normal" access, until 30-40 MB/s over 8 Channels and 8 Stripes in an LVM with 8 DASDs... Do you really have more than 10 MB/sec when accessing ONE seperate Dasd? regards > Frank Schwede > Lufthansa Systems Infratec GmbH > > http://www.LHsystems.com > -----Ursprüngliche Nachricht----- Von: Linux on 390 Port [mailto:[EMAIL PROTECTED] Auftrag von N. Blekemolen Gesendet: Freitag, 16. Juli 2004 15:22 An: [EMAIL PROTECTED] Betreff: Re: Performance of large file systems Only for the last four years :-)... Nico Blekemolen TMI Dagblad De Telegraaf "Ledbetter, Scott E" <[EMAIL PROTECTED]> Verzonden door: Linux on 390 Port <[EMAIL PROTECTED]> 16-07-2004 14:47 Antwoord a.u.b. aan Linux on 390 Port <[EMAIL PROTECTED]> Aan [EMAIL PROTECTED] Cc Onderwerp Re: [LINUX-390] Performance of large file systems I guess I have made an incorrect assumption here. I'm in my own little world, where in our product (StorageTek SVA) FICON and PAV are married. I'm guessing most people using PAV are also using FICON. I'll throw it out: Anyone using PAV on a DASD box with ESCON? Scott Ledbetter StorageTek -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Klaus Bergmann Sent: Friday, July 16, 2004 1:54 AM To: [EMAIL PROTECTED] Subject: Re: Performance of large file systems Scott Ledbetter wrote: >Since you are ESCON, you are not PAV capable I am unaware of this restriction, where did you find it? Klaus Bergmann Linux Architecture and Performance, IBM Lab Boeblingen ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. ********************************************************************** ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
