* [linux-lvm] extending striped lv @ 2001-08-23 23:23 Brad Langhorst 2001-08-24 7:46 ` Joe Thornber 2001-08-24 9:28 ` Goetz Bock 0 siblings, 2 replies; 6+ messages in thread From: Brad Langhorst @ 2001-08-23 23:23 UTC (permalink / raw) To: linux-lvm I read in the Howto that it is not possible to add a disk to a striped LV. I assume this is being worked on - is that correct? What about extending an LV with free space on the same VG? I've got a 2PVs in one VG and I'm planning to make an LV that is not the whole size of the VG with the intention of extending it later or adding a second LV for a different purpose. I'd like to enable striping to realize a performance increase but only if I can extend the LV later. thanks! brad __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] extending striped lv 2001-08-23 23:23 [linux-lvm] extending striped lv Brad Langhorst @ 2001-08-24 7:46 ` Joe Thornber 2001-08-24 9:28 ` Goetz Bock 1 sibling, 0 replies; 6+ messages in thread From: Joe Thornber @ 2001-08-24 7:46 UTC (permalink / raw) To: linux-lvm On Thu, Aug 23, 2001 at 04:23:49PM -0700, Brad Langhorst wrote: > I read in the Howto that it is not possible to add a > disk to a striped LV. I assume this is being worked > on - is that correct? Not actively ATM. - Joe ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] extending striped lv 2001-08-23 23:23 [linux-lvm] extending striped lv Brad Langhorst 2001-08-24 7:46 ` Joe Thornber @ 2001-08-24 9:28 ` Goetz Bock 2001-08-27 17:42 ` AJ Lewis 1 sibling, 1 reply; 6+ messages in thread From: Goetz Bock @ 2001-08-24 9:28 UTC (permalink / raw) To: linux-lvm [-- Attachment #1: Type: text/plain, Size: 306 bytes --] On Thu, Aug 23 '01 at 16:23, Brad Langhorst wrote: > [ ... extending a (striped) LV ... ] I'm not 100% positive, but AFAIK you can extend striped LV, but if you do the extened LV is only partially striped. -- Goetz Bock IT Consultant Dipl.-Inf. Univ. [-- Attachment #2: Type: application/pgp-signature, Size: 232 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] extending striped lv 2001-08-24 9:28 ` Goetz Bock @ 2001-08-27 17:42 ` AJ Lewis 2001-08-28 10:55 ` Jan Schreckenbach 0 siblings, 1 reply; 6+ messages in thread From: AJ Lewis @ 2001-08-27 17:42 UTC (permalink / raw) To: linux-lvm [-- Attachment #1: Type: text/plain, Size: 1314 bytes --] On Fri, Aug 24, 2001 at 11:28:59AM +0200, Goetz Bock wrote: > On Thu, Aug 23 '01 at 16:23, Brad Langhorst wrote: > > [ ... extending a (striped) LV ... ] > I'm not 100% positive, but AFAIK you can extend striped LV, but if you > do the extened LV is only partially striped. Nope, you can only extend a striped LV on the PV's it is currently on. After that you either have to pvmove it to larger PVs or rebuild with more disks. If you want to be able to extend LVs and need software striping, you might want to consider using MD striping underneath LVM. Regards, -- AJ Lewis Sistina Software Inc. Voice: 612-638-0500 1313 5th St SE, Suite 111 Fax: 612-638-0500 Minneapolis, MN 55414 E-Mail: lewis@sistina.com http://www.sistina.com Current GPG fingerprint = 3B5F 6011 5216 76A5 2F6B 52A0 941E 1261 0029 2648 Get my key at: http://www.sistina.com/~lewis/gpgkey (Unfortunately, the PKS-type keyservers do not work with multiple sub-keys) -----Begin Obligatory Humorous Quote---------------------------------------- Hope is NOT a thing with feathers, the thing with feathers is my nephew, and I have to take him to a specialist in Zurich. - Woody Allen -----End Obligatory Humorous Quote------------------------------------------ [-- Attachment #2: Type: application/pgp-signature, Size: 232 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] extending striped lv 2001-08-27 17:42 ` AJ Lewis @ 2001-08-28 10:55 ` Jan Schreckenbach 2001-08-30 12:35 ` AJ Lewis 0 siblings, 1 reply; 6+ messages in thread From: Jan Schreckenbach @ 2001-08-28 10:55 UTC (permalink / raw) To: linux-lvm AJ Lewis wrote: > Nope, you can only extend a striped LV on the PV's it is currently on. > After that you either have to pvmove it to larger PVs or rebuild with more > disks. > > If you want to be able to extend LVs and need software striping, you might > want to consider using MD striping underneath LVM. > AJ, does this mean I can initially build a striped LV from two smaller disks, let me say sda and sdb and later move the LE from sda to sdc and from sdb to sdd (where sdc and sdb a bigger than sda/sdb)? It is to be said that the performance of md RAID0 is somewhat better than from striped LV's but I would prefer LVM if I could extend a striped LV without rebuilding RAID/restoring data. cu, Jan -- _______________________________________________________________________ THE BEST RUN E-BUSINESSES RUN SAP _______________________________________________________________________ Jan Schreckenbach email: Jan.Schreckenbach@sap.com SAP AG Walldorf/Baden, Germany Phone: +49 6227 7-47474 LinuxLab Fax : +49 6227 78-31414 SAP LinuxLab support address: linux@sap.com ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] extending striped lv 2001-08-28 10:55 ` Jan Schreckenbach @ 2001-08-30 12:35 ` AJ Lewis 0 siblings, 0 replies; 6+ messages in thread From: AJ Lewis @ 2001-08-30 12:35 UTC (permalink / raw) To: linux-lvm [-- Attachment #1: Type: text/plain, Size: 1710 bytes --] On Tue, Aug 28, 2001 at 12:55:40PM +0200, Jan Schreckenbach wrote: > does this mean I can initially build a striped LV from two smaller > disks, let me say sda and sdb and later move the LE from sda to sdc > and from sdb to sdd (where sdc and sdb a bigger than sda/sdb)? Yes, that should work. Then the LEs would be just on sdc and sdd, and sda and sdb would be empty. > It is to be said that the performance of md RAID0 is somewhat better > than from striped LV's but I would prefer LVM if I could extend > a striped LV without rebuilding RAID/restoring data. Well, like I said, if you used md RAID0 underneath LVM, you could stripe across, say, sda and sdb, and then creat your LV on top of the md device, then when you wanted to extend it, create a striped md device across sdc and sdd and and extend the VG/LV to that md device. Anyway, it really depends upon your application. If you're really concerned about speed, you'd probably go with hardware RAID0 anyway, but that's a whole different discussion. Regards, -- AJ Lewis Sistina Software Inc. Voice: 612-638-0500 1313 5th St SE, Suite 111 Fax: 612-638-0500 Minneapolis, MN 55414 E-Mail: lewis@sistina.com http://www.sistina.com Current GPG fingerprint = 3B5F 6011 5216 76A5 2F6B 52A0 941E 1261 0029 2648 Get my key at: http://people.sistina.com/~lewis/gpgkey (Unfortunately, the PKS-type keyservers do not work with multiple sub-keys) -----Begin Obligatory Humorous Quote---------------------------------------- Behind every good computer -- is a jumble of wires 'n stuff. -----End Obligatory Humorous Quote------------------------------------------ [-- Attachment #2: Type: application/pgp-signature, Size: 232 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2001-08-30 12:35 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2001-08-23 23:23 [linux-lvm] extending striped lv Brad Langhorst 2001-08-24 7:46 ` Joe Thornber 2001-08-24 9:28 ` Goetz Bock 2001-08-27 17:42 ` AJ Lewis 2001-08-28 10:55 ` Jan Schreckenbach 2001-08-30 12:35 ` AJ Lewis
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