Re: [PVE-User] LVM over ISCSI Bad performance
Am 22.06.2016 um 12:10 schrieb Marco Gaiarin: Mandi! Emmanuel Kasper In chel di` si favelave... Just submit the formular and one of the moderators will grant you an account. Seems i was able to complete the registration form... Harald, try to jump out of the ''equation'' input box with a tab, and then push 'confirm' in the form. Nope no way... -- Harald Leithner ITronic Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria Tel: +43-1-545 0 604 Mobil: +43-699-123 78 4 78 Mail: leith...@itronic.at | itronic.at ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
Re: [PVE-User] PVE 4.2 multipathing over iscsi problem
Mandi! Sebastian Gruner In chel di` si favelave... > that multipath does not start at boot is a bug in multipath-tools 0.5.0. References? I've look at: https://bugs.debian.org/cgi-bin/pkgreport.cgi?src=multipath-tools but i've not found it... -- dott. Marco Gaiarin GNUPG Key ID: 240A3D66 Associazione ``La Nostra Famiglia'' http://www.lanostrafamiglia.it/ Polo FVG - Via della Bontà, 7 - 33078 - San Vito al Tagliamento (PN) marco.gaiarin(at)lanostrafamiglia.it t +39-0434-842711 f +39-0434-842797 Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA! http://www.lanostrafamiglia.it/25/index.php/component/k2/item/123 (cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA) ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
Re: [PVE-User] LVM over ISCSI Bad performance
Mandi! Emmanuel Kasper In chel di` si favelave... > Just submit the formular and one of the moderators will grant you an > account. Seems i was able to complete the registration form... Harald, try to jump out of the ''equation'' input box with a tab, and then push 'confirm' in the form. -- dott. Marco Gaiarin GNUPG Key ID: 240A3D66 Associazione ``La Nostra Famiglia'' http://www.lanostrafamiglia.it/ Polo FVG - Via della Bontà, 7 - 33078 - San Vito al Tagliamento (PN) marco.gaiarin(at)lanostrafamiglia.it t +39-0434-842711 f +39-0434-842797 Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA! http://www.lanostrafamiglia.it/25/index.php/component/k2/item/123 (cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA) ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
Re: [PVE-User] LVM over ISCSI Bad performance
Am 22.06.2016 um 10:44 schrieb Emmanuel Kasper: On 06/22/2016 09:31 AM, Marco Gaiarin wrote: Mandi! Michael Rasmussen In chel di` si favelave... Multipath must be manually configured via CLI. Seems rather a 'FAQ', i've hitted the same things a month ago, but i've had found that posts on the forum: https://forum.proxmox.com/threads/multipath-iscsi.2808/ It is true that, if you have understood deeply how LVM2 and PVE works, is rather obvious, but the missing on this little info on that page confuse new users (or at least confuse a new user at month ;-). Wiki can be edited? I've seen that an account wiki have to be ''requested'': https://pve.proxmox.com/wiki/Special:RequestAccount there are mentors or something like that? Just submit the formular and one of the moderators will grant you an account. We don't automatically allow account creation to prevent spam. I tried this but get the error message "Incorrect or missing confirmation code." and I'm pretty sure I solved "3 - 0" correct. ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user -- Harald Leithner ITronic Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria Tel: +43-1-545 0 604 Mobil: +43-699-123 78 4 78 Mail: leith...@itronic.at | itronic.at ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
Re: [PVE-User] LVM over ISCSI Bad performance
On 06/22/2016 09:31 AM, Marco Gaiarin wrote: > Mandi! Michael Rasmussen > In chel di` si favelave... > >> Multipath must be manually configured via CLI. > > Seems rather a 'FAQ', i've hitted the same things a month ago, but i've > had found that posts on the forum: > > https://forum.proxmox.com/threads/multipath-iscsi.2808/ > > It is true that, if you have understood deeply how LVM2 and PVE works, > is rather obvious, but the missing on this little info on that page > confuse new users (or at least confuse a new user at month ;-). > > > Wiki can be edited? I've seen that an account wiki have to be > ''requested'': > > https://pve.proxmox.com/wiki/Special:RequestAccount > > there are mentors or something like that? > Just submit the formular and one of the moderators will grant you an account. We don't automatically allow account creation to prevent spam. ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
Re: [PVE-User] LVM over ISCSI Bad performance
Hi, thank you for pointing this out for me. Also thanks an Marco for the forum Link, a wiki update would be a real good idea. I tried to request an account but was unable to solve the "confirmation code"?! @the multipathing topic to restore vms, I restored a VM without and problems. thx Harald Am 22.06.2016 um 08:44 schrieb Sebastian Gruner: Hi, you have to create a physical volume for each LUN Pvcreate /dev/dm-0 Pvcreate /dev/dm-1 Then you can create a volumegroup Vgcreate groupname /dev/dm-0 And extend the group with the second volume Vgextend groupname /dev/dm-1 After that you can mount the lvm group aus storage in webinterface ### Hi again^^, I miss interpreted the benchmark result, with writeback cache is 5500 MB/s so thats ok... with direct IO it gets about 100 MB/s But I have still no clue how I could use multipath with proxmox web interface. regards, Harald Am 21.06.2016 um 19:15 schrieb Harald Leithner: Hi, I have a MSA2312 connected with 1gbit to a 3 node PVE 4.2 Cluster. I managed to get ISCSI and LVM working and attached it to a VM. Atm I didn't manage to get multipath working with PVE because the Wikipage tells me how to create multipath (which works) but not how PVE uses it for LVM VGs... maybe someone give me a hint. Anyway the main problem is that fio only gives me a read performance of 5 mb/s if I attach a disk as virtio or scsi device with cache "Writeback". If I attach the same SAN Drive directly in the VM with iSCSI (with and without multipath) I get about 112 MB/s. I also get this speed on the pve host. I use: fio --filename=/dev/sdb --direct=1 --rw=read --bs=1m --size=20G --numjobs=200 --runtime=60 --group_reporting --name=file1 for benchmarking. While benchmarking the VM I see 1300% cpu usage on the host (mainly sys time) Maybe someone has a idea? regards -- Harald Leithner ITronic Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria Tel: +43-1-545 0 604 Mobil: +43-699-123 78 4 78 Mail: leith...@itronic.at | itronic.at ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user -- Harald Leithner ITronic Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria Tel: +43-1-545 0 604 Mobil: +43-699-123 78 4 78 Mail: leith...@itronic.at | itronic.at ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
Re: [PVE-User] LVM over ISCSI Bad performance
Hi, you have to create a physical volume for each LUN Pvcreate /dev/dm-0 Pvcreate /dev/dm-1 Then you can create a volumegroup Vgcreate groupname /dev/dm-0 And extend the group with the second volume Vgextend groupname /dev/dm-1 After that you can mount the lvm group aus storage in webinterface ### Hi again^^, I miss interpreted the benchmark result, with writeback cache is 5500 MB/s so thats ok... with direct IO it gets about 100 MB/s But I have still no clue how I could use multipath with proxmox web interface. regards, Harald Am 21.06.2016 um 19:15 schrieb Harald Leithner: > Hi, > > I have a MSA2312 connected with 1gbit to a 3 node PVE 4.2 Cluster. > I managed to get ISCSI and LVM working and attached it to a VM. > > Atm I didn't manage to get multipath working with PVE because the > Wikipage tells me how to create multipath (which works) but not how > PVE uses it for LVM VGs... maybe someone give me a hint. > > Anyway the main problem is that fio only gives me a read performance > of > 5 mb/s if I attach a disk as virtio or scsi device with cache "Writeback". > > If I attach the same SAN Drive directly in the VM with iSCSI (with and > without multipath) I get about 112 MB/s. > > I also get this speed on the pve host. > > I use: > > fio --filename=/dev/sdb --direct=1 --rw=read --bs=1m --size=20G > --numjobs=200 --runtime=60 --group_reporting --name=file1 > > for benchmarking. > > While benchmarking the VM I see 1300% cpu usage on the host (mainly > sys > time) > > Maybe someone has a idea? > > regards > -- Harald Leithner ITronic Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria Tel: +43-1-545 0 604 Mobil: +43-699-123 78 4 78 Mail: leith...@itronic.at | itronic.at ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
