Re: New version of SWAPGEN available
So this swapgen utility makes the V-Disk linux ready? Does that mean it's formatted as swap? What do you do then within in the Linux guest to use the device as swap? Adam Thornton [EMAIL PROTECTED] mine.net To Sent by: Linux on [EMAIL PROTECTED] 390 Port cc [EMAIL PROTECTED] IST.EDU Subject New version of SWAPGEN available 06/24/2004 05:00 PM Please respond to Linux on 390 Port [EMAIL PROTECTED] IST.EDU Version 5 of SWAPGEN is now available from http://www.sinenomine.net/downloads It's pretty much the same as version 4, but there's a new option: REUSE If your system policy doesn't allow your guests to define their own VDISKs, but instead mandates that they be present in the directory entry, you can use, for example, SWAPGEN 152 20 ( REUSE (which would write a Linux swap signature on a DIAG-accessible, CMS-FORMATted and RESERVEd 20 block V-DISK at address 152). Note that if you're using REUSE you still have to specify the size in 512-blocks, and it needs to match the actual device size. I agonized over putting the feature in at all, because it makes it possible to destroy extant data with SWAPGEN (which was not previously possible), and I finally compromised by only touching devices whose size you've specified on the command line. Consider that the safety catch: if you've said REUSE and you know the size of the device, we assume you really do mean to overwrite it. REUSE is *not* the default. The default is still to detach whatever's at the address you specify, allocate a V-DISK at that address, and use it. Adam -- 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
Re: New version of SWAPGEN available
Yes, it's ready for Linux use as a swap device. You just need an entry for swap in the /etc/fstab file... DJ James Melin wrote: So this swapgen utility makes the V-Disk linux ready? Does that mean it's formatted as swap? What do you do then within in the Linux guest to use the device as swap? Adam Thornton [EMAIL PROTECTED] mine.net To Sent by: Linux on [EMAIL PROTECTED] 390 Port cc [EMAIL PROTECTED] IST.EDU Subject New version of SWAPGEN available 06/24/2004 05:00 PM Please respond to Linux on 390 Port [EMAIL PROTECTED] IST.EDU Version 5 of SWAPGEN is now available from http://www.sinenomine.net/downloads It's pretty much the same as version 4, but there's a new option: REUSE If your system policy doesn't allow your guests to define their own VDISKs, but instead mandates that they be present in the directory entry, you can use, for example, SWAPGEN 152 20 ( REUSE (which would write a Linux swap signature on a DIAG-accessible, CMS-FORMATted and RESERVEd 20 block V-DISK at address 152). Note that if you're using REUSE you still have to specify the size in 512-blocks, and it needs to match the actual device size. I agonized over putting the feature in at all, because it makes it possible to destroy extant data with SWAPGEN (which was not previously possible), and I finally compromised by only touching devices whose size you've specified on the command line. Consider that the safety catch: if you've said REUSE and you know the size of the device, we assume you really do mean to overwrite it. REUSE is *not* the default. The default is still to detach whatever's at the address you specify, allocate a V-DISK at that address, and use it. Adam -- 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 -- Dave Jones Sine Nomine Associates Houston, TX 281.578.7544 -- 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
Re: New version of SWAPGEN available
K. I've just gotten to the point where our VM guy is going to finally let me USE vdisk for swap (took much convincing) and he assigned that device at dev 300. swapgen not withstanding, I've been unable to get linux to recognize the device. I've tried adding it using an add command echoed to /proc/dasd/devices and I get 0203(ECKD) at ( 94: 12) is dasdd : active at blocksize: 4096, 216000 blocks, 843 MB 0300(none) at ( 94: 16) is dasde : unknown I wanted to resolve THIS part before I tried to do something slick with swapgen. Perhaps I am being premature? Dave Jones [EMAIL PROTECTED] e.net To Sent by: Linux on [EMAIL PROTECTED] 390 Port cc [EMAIL PROTECTED] IST.EDU Subject Re: New version of SWAPGEN available 06/25/2004 09:24 AM Please respond to Linux on 390 Port [EMAIL PROTECTED] IST.EDU Yes, it's ready for Linux use as a swap device. You just need an entry for swap in the /etc/fstab file... DJ James Melin wrote: So this swapgen utility makes the V-Disk linux ready? Does that mean it's formatted as swap? What do you do then within in the Linux guest to use the device as swap? Adam Thornton [EMAIL PROTECTED] mine.net To Sent by: Linux on [EMAIL PROTECTED] 390 Port cc [EMAIL PROTECTED] IST.EDU Subject New version of SWAPGEN available 06/24/2004 05:00 PM Please respond to Linux on 390 Port [EMAIL PROTECTED] IST.EDU Version 5 of SWAPGEN is now available from http://www.sinenomine.net/downloads It's pretty much the same as version 4, but there's a new option: REUSE If your system policy doesn't allow your guests to define their own VDISKs, but instead mandates that they be present in the directory entry, you can use, for example, SWAPGEN 152 20 ( REUSE (which would write a Linux swap signature on a DIAG-accessible, CMS-FORMATted and RESERVEd 20 block V-DISK at address 152). Note that if you're using REUSE you still have to specify the size in 512-blocks, and it needs to match the actual device size. I agonized over putting the feature in at all, because it makes it possible to destroy extant data with SWAPGEN (which was not previously possible), and I finally compromised by only touching devices whose size you've specified on the command line. Consider that the safety catch: if you've said REUSE and you know the size of the device, we assume you really do mean to overwrite it. REUSE is *not* the default. The default is still to detach whatever's at the address you specify, allocate a V-DISK at that address, and use it. Adam -- 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 -- Dave Jones Sine Nomine Associates Houston, TX 281.578.7544 -- 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
Re: New version of SWAPGEN available
Dave Jones wrote on 25-06-2004 15:48:32: K. I've just gotten to the point where our VM guy is going to finally let me USE vdisk for swap (took much convincing) and he assigned that device at dev 300. swapgen not withstanding, I've been unable to get linux to recognize the device. I've tried adding it using an add command echoed to /proc/dasd/devices and I get 0203(ECKD) at ( 94: 12) is dasdd : active at blocksize: 4096, 216000 blocks, 843 MB 0300(none) at ( 94: 16) is dasde : unknown I wanted to resolve THIS part before I tried to do something slick with swapgen. Perhaps I am being premature? Dave, Please check if you've got the dasd_diag_mod and/or dasd_fba_mod kernel module loaded. The dasd_diag_mod module allows you fast access to CMS reserved disks via the diagnose driver, or the dasd_fba_mod module lets you use fba type devices like the dasd_eckd_mod module lets you talk to 3390s. Ronald van der Laan -- 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
Re: New version of SWAPGEN available
On Fri, 2004-06-25 at 08:12, James Melin wrote: So this swapgen utility makes the V-Disk linux ready? Does that mean it's formatted as swap? What do you do then within in the Linux guest to use the device as swap? Yes. It is formatted as swap. Within the Linux guest you then do (presuming that the swap device is /dev/dasdb) swapon /dev/dasdb1 (in DIAG mode) or swapon /dev/dasdb But actually you just put the correct device in /etc/fstab and it happens automagically. This saves you the step of having to do a mkswap/swapon in your boot sequence--which is no big deal, but if you're using DIAG you will need to have CMS FORMATted and RESERVEd your V-DISK anyway in CMS before IPLing Linux, and while you are doing that you might as well write the swap signature. Adam -- 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
Re: New version of SWAPGEN available
On Fri, 2004-06-25 at 08:48, James Melin wrote: K. I've just gotten to the point where our VM guy is going to finally let me USE vdisk for swap (took much convincing) and he assigned that device at dev 300. swapgen not withstanding, I've been unable to get linux to recognize the device. I've tried adding it using an add command echoed to /proc/dasd/devices and I get 0203(ECKD) at ( 94: 12) is dasdd : active at blocksize: 4096, 216000 blocks, 843 MB 0300(none) at ( 94: 16) is dasde : unknown You need to load the FBA DASD driver. insmod dasd_fba, IIRC. If you want the best performance out of your VDISK, you need the DIAG driver too. Adam -- 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
Re: New version of SWAPGEN available
James, With help from Don Robbins and others I wrote up using VDISK swap with the SWAPGEN EXEC in the Domino on zLinux (tm) redbook: http://publib-b.boulder.ibm.com/Redbooks.nsf/RedbookAbstracts/sg247021.html?Open Section 6.6.2 I believe. -Mike MacIsaac, IBM mikemac at us.ibm.com (845) 433-7061 -- 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
Re: New version of SWAPGEN available
James, In order to use vdisks, they have to configured similar to an FBA device. Block size must be 512. If you define the vdisk in the VM directory and run SWAPGEN with the proper device number, you should be alright. I am no expert, just tried it once. Cheers, Loren Charnley, Jr. IT Systems Engineer Family Dollar Stores, Inc. [EMAIL PROTECTED] (704) 847-6961 x 2000 -Original Message- From: James Melin [mailto:[EMAIL PROTECTED] Sent: Friday, June 25, 2004 9:49 AM To: [EMAIL PROTECTED] Subject: Re: New version of SWAPGEN available K. I've just gotten to the point where our VM guy is going to finally let me USE vdisk for swap (took much convincing) and he assigned that device at dev 300. swapgen not withstanding, I've been unable to get linux to recognize the device. I've tried adding it using an add command echoed to /proc/dasd/devices and I get 0203(ECKD) at ( 94: 12) is dasdd : active at blocksize: 4096, 216000 blocks, 843 MB 0300(none) at ( 94: 16) is dasde : unknown I wanted to resolve THIS part before I tried to do something slick with swapgen. Perhaps I am being premature? Dave Jones [EMAIL PROTECTED] e.net To Sent by: Linux on [EMAIL PROTECTED] 390 Port cc [EMAIL PROTECTED] IST.EDU Subject Re: New version of SWAPGEN available 06/25/2004 09:24 AM Please respond to Linux on 390 Port [EMAIL PROTECTED] IST.EDU Yes, it's ready for Linux use as a swap device. You just need an entry for swap in the /etc/fstab file... DJ James Melin wrote: So this swapgen utility makes the V-Disk linux ready? Does that mean it's formatted as swap? What do you do then within in the Linux guest to use the device as swap? Adam Thornton [EMAIL PROTECTED] mine.net To Sent by: Linux on [EMAIL PROTECTED] 390 Port cc [EMAIL PROTECTED] IST.EDU Subject New version of SWAPGEN available 06/24/2004 05:00 PM Please respond to Linux on 390 Port [EMAIL PROTECTED] IST.EDU Version 5 of SWAPGEN is now available from http://www.sinenomine.net/downloads It's pretty much the same as version 4, but there's a new option: REUSE If your system policy doesn't allow your guests to define their own VDISKs, but instead mandates that they be present in the directory entry, you can use, for example, SWAPGEN 152 20 ( REUSE (which would write a Linux swap signature on a DIAG-accessible, CMS-FORMATted and RESERVEd 20 block V-DISK at address 152). Note that if you're using REUSE you still have to specify the size in 512-blocks, and it needs to match the actual device size. I agonized over putting the feature in at all, because it makes it possible to destroy extant data with SWAPGEN (which was not previously possible), and I finally compromised by only touching devices whose size you've specified on the command line. Consider that the safety catch: if you've said REUSE and you know the size of the device, we assume you really do mean to overwrite it. REUSE is *not* the default. The default is still to detach whatever's at the address you specify, allocate a V-DISK at that address, and use it. Adam -- 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 -- Dave Jones Sine Nomine Associates Houston, TX 281.578.7544 -- 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
New version of SWAPGEN available
Version 5 of SWAPGEN is now available from http://www.sinenomine.net/downloads It's pretty much the same as version 4, but there's a new option: REUSE If your system policy doesn't allow your guests to define their own VDISKs, but instead mandates that they be present in the directory entry, you can use, for example, SWAPGEN 152 20 ( REUSE (which would write a Linux swap signature on a DIAG-accessible, CMS-FORMATted and RESERVEd 20 block V-DISK at address 152). Note that if you're using REUSE you still have to specify the size in 512-blocks, and it needs to match the actual device size. I agonized over putting the feature in at all, because it makes it possible to destroy extant data with SWAPGEN (which was not previously possible), and I finally compromised by only touching devices whose size you've specified on the command line. Consider that the safety catch: if you've said REUSE and you know the size of the device, we assume you really do mean to overwrite it. REUSE is *not* the default. The default is still to detach whatever's at the address you specify, allocate a V-DISK at that address, and use it. Adam -- 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
