We define the entire Open Systems side of our ESS boxes as 4 Gig luns. It seemes to be a nice allocation amount which is much more useful than a mod-3 but not so large as a mod-9
We use either LVM or RAID 0 to stripe them together into larger filesystems. If you will be needing huge ( on the order of 1 TB ) filesystems, you may want to allocate it in 20 Gig luns so that you don't have to string together so many volumes to get the space you need. It's a balancing act between flexibility / efficiency and ease of managment / possible overallocation. It's rather similar to choosing a block size for a new disk in that respect. Jay Brenneman Linux Test and Integration Center T/L: 295 - 7745 Extern: 845 - 435 - 7745 [EMAIL PROTECTED] "Seader, Cameron" <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[EMAIL PROTECTED]> 09/28/04 11:56 AM Please respond to Linux on 390 Port To [EMAIL PROTECTED] cc Subject Re: FCP SCSI Lun Allocation encountered moving from DASD eckd to FCP SCSI? BTW that is good information that you provided here. I am looking more for information on how people are setting up their lun sizes for each guest. Are they doing it by a guest per guest basis or do they have one guest with a 10 gig lun size and one with a 20 and so on. What is everyone doing? -Cameron -----Original Message----- From: Post, Mark K [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 08:54 To: [EMAIL PROTECTED] Subject: Re: FCP SCSI Lun Allocation Uhh, encountered _what_ before? You didn't say, exactly. If you're just looking for information, try these: http://linuxvm.org/present/SHARE100/S9333NFa.pdf http://linuxvm.org/present/SHARE103/S9259vs.pdf Mark Post -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Seader, Cameron Sent: Tuesday, September 28, 2004 10:34 AM To: [EMAIL PROTECTED] Subject: FCP SCSI Lun Allocation We are moving to FCP and SCSI disks soon for our Linux Guests and i am wondering if anyone has encountered this before? and what kind of lun sizing did you go with? what kind of lun sizing scheme did you come up with? What did you use for you paging file? vdisk? Please post any helpful info to point me in the right direction. If you have any experiences please share. Thanks, Cameron Seader ---------------------------------------------------------------------- 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 [INFO] -- Access Manager: This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. A2 ---------------------------------------------------------------------- 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
