[Users] NFS troubleshooting page
------=_NextPartTM-000-442c68c1-bc6a-4509-872b-5b6cc4a1ee67 Content-Type: multipart/alternative; boundary="_000_12EF8D94C6F8734FB2FF37B9FBEDD17358574D93EXCHANGEcollogi_" --_000_12EF8D94C6F8734FB2FF37B9FBEDD17358574D93EXCHANGEcollogi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello, although it helps nobody I just want to leave the information that my first two weeks with ovirt were horrible. That said I'm still confident that I will able to get it all managed. For know I have some addition to the NFS troubleshooting wiki that could be helpful for others. My wiki account request is still pending so maybe someone with access could expand the page. NFS mounts on the hypervisor hosts (at least Fedora 19) use the option rsize=3D1M,wsize=3D1M by default. If the NFS servers maximum tcp window memory settings are less or equal than 1M the connections to NFS data/ISO domains may stall from time to time. Raising the TCP kernel settings on NFS server side to net.ipv4.tcp_mem =3D 4096 65536 4194304 net.ipv4.tcp_rmem =3D 4096 65536 4194304 net.ipv4.tcp_wmem =3D 4096 65536 4194304 helps to get things stable. Markus --_000_12EF8D94C6F8734FB2FF37B9FBEDD17358574D93EXCHANGEcollogi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html dir=3D"ltr"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-= 1"> <style id=3D"owaParaStyle" type=3D"text/css">P {margin-top:0;margin-bottom:= 0;}</style> </head> <body ocsi=3D"0" fpstyle=3D"1"> <div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: = 10pt;">Hello,<br> <br> although it helps nobody I just want to leave the information that <br> my first two weeks with ovirt were horrible. That said I'm still<br> confident that I will able to get it all managed. <br> <br> For know I have some addition to the NFS troubleshooting wiki<br> that could be helpful for others. My wiki account request is still<br> pending so maybe someone with access could expand the page.<br> <br> NFS mounts on the hypervisor hosts (at least Fedora 19) use the <br> option rsize=3D1M,wsize=3D1M by default. If the NFS servers maximum <br> tcp window memory settings are less or equal than 1M the <br> connections to NFS data/ISO domains may stall from time to time.<br> <br> Raising the TCP kernel settings on NFS server side to<br> <br> net.ipv4.tcp_mem =3D 4096 65536 4194304<br> net.ipv4.tcp_rmem =3D 4096 65536 4194304<br> net.ipv4.tcp_wmem =3D 4096 65536 4194304<br> <br> helps to get things stable.<br> <br> Markus<br> <br> <br> <br> <br> </div> </body> </html> --_000_12EF8D94C6F8734FB2FF37B9FBEDD17358574D93EXCHANGEcollogi_-- ------=_NextPartTM-000-442c68c1-bc6a-4509-872b-5b6cc4a1ee67 Content-Type: text/plain; name="InterScan_Disclaimer.txt" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="InterScan_Disclaimer.txt" **************************************************************************** Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. Über das Internet versandte E-Mails können unter fremden Namen erstellt oder manipuliert werden. Deshalb ist diese als E-Mail verschickte Nachricht keine rechtsverbindliche Willenserklärung. Collogia Unternehmensberatung AG Ubierring 11 D-50678 Köln Vorstand: Kadir Akin Dr. Michael Höhnerbach Vorsitzender des Aufsichtsrates: Hans Kristian Langva Registergericht: Amtsgericht Köln Registernummer: HRB 52 497 This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. e-mails sent over the internet may have been written under a wrong name or been manipulated. That is why this message sent as an e-mail is not a legally binding declaration of intention. Collogia Unternehmensberatung AG Ubierring 11 D-50678 Köln executive board: Kadir Akin Dr. Michael Höhnerbach President of the supervisory board: Hans Kristian Langva Registry office: district court Cologne Register number: HRB 52 497 **************************************************************************** ------=_NextPartTM-000-442c68c1-bc6a-4509-872b-5b6cc4a1ee67--
Hi Markus, I am sorry that you had a bad experience with ovirt and I am sure everyone in the ovirt community appreciate your feedback and your contribution. As you said, I am positive that you will be able to get it all managed and please use the list for any needed assistance. I am adding some people to this mail so that they can help with the wiki request. Thanks for the input! Dafna On 09/09/2013 11:53 AM, Markus Stockhausen wrote:
Hello,
although it helps nobody I just want to leave the information that my first two weeks with ovirt were horrible. That said I'm still confident that I will able to get it all managed.
For know I have some addition to the NFS troubleshooting wiki that could be helpful for others. My wiki account request is still pending so maybe someone with access could expand the page.
NFS mounts on the hypervisor hosts (at least Fedora 19) use the option rsize=1M,wsize=1M by default. If the NFS servers maximum tcp window memory settings are less or equal than 1M the connections to NFS data/ISO domains may stall from time to time.
Raising the TCP kernel settings on NFS server side to
net.ipv4.tcp_mem = 4096 65536 4194304 net.ipv4.tcp_rmem = 4096 65536 4194304 net.ipv4.tcp_wmem = 4096 65536 4194304
helps to get things stable.
Markus
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Dafna Ron
On 09/09/2013 01:53 PM, Markus Stockhausen wrote:
Hello,
although it helps nobody I just want to leave the information that my first two weeks with ovirt were horrible. That said I'm still confident that I will able to get it all managed.
For know I have some addition to the NFS troubleshooting wiki that could be helpful for others. My wiki account request is still pending so maybe someone with access could expand the page.
NFS mounts on the hypervisor hosts (at least Fedora 19) use the option rsize=1M,wsize=1M by default. If the NFS servers maximum tcp window memory settings are less or equal than 1M the connections to NFS data/ISO domains may stall from time to time.
Raising the TCP kernel settings on NFS server side to
net.ipv4.tcp_mem = 4096 65536 4194304 net.ipv4.tcp_rmem = 4096 65536 4194304 net.ipv4.tcp_wmem = 4096 65536 4194304
helps to get things stable.
ayal/federico - thoughts on how we can make things better? warn? etc?
This is a multi-part message in MIME format. ------=_NextPartTM-000-d683498f-8a84-477f-994b-500ad7716bb3 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
ayal/federico - thoughts on how we can make things better? warn? etc?=0A= =0A= Got my account and already modified the wiki. =0A= =0A= Thanks for the help.=0A= =0A= Markus=0A= ------=_NextPartTM-000-d683498f-8a84-477f-994b-500ad7716bb3 Content-Type: text/plain; name="InterScan_Disclaimer.txt" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="InterScan_Disclaimer.txt"
**************************************************************************** Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. Über das Internet versandte E-Mails können unter fremden Namen erstellt oder manipuliert werden. Deshalb ist diese als E-Mail verschickte Nachricht keine rechtsverbindliche Willenserklärung. Collogia Unternehmensberatung AG Ubierring 11 D-50678 Köln Vorstand: Kadir Akin Dr. Michael Höhnerbach Vorsitzender des Aufsichtsrates: Hans Kristian Langva Registergericht: Amtsgericht Köln Registernummer: HRB 52 497 This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. e-mails sent over the internet may have been written under a wrong name or been manipulated. That is why this message sent as an e-mail is not a legally binding declaration of intention. Collogia Unternehmensberatung AG Ubierring 11 D-50678 Köln executive board: Kadir Akin Dr. Michael Höhnerbach President of the supervisory board: Hans Kristian Langva Registry office: district court Cologne Register number: HRB 52 497 **************************************************************************** ------=_NextPartTM-000-d683498f-8a84-477f-994b-500ad7716bb3--
On 09/09/2013 04:42 PM, Markus Stockhausen wrote:
ayal/federico - thoughts on how we can make things better? warn? etc?
Got my account and already modified the wiki.
Thanks for the help.
Markus
thanks markus. my question to ayal/federico is on how to fix the original issue to at least warn about the issue.
----- Original Message -----
From: "Itamar Heim" <iheim@redhat.com> To: "Markus Stockhausen" <stockhausen@collogia.de> Cc: "Ayal Baron" <abaron@redhat.com>, "Federico Simoncelli" <fsimonce@redhat.com>, users@ovirt.org, "Allon Mureinik" <amureini@redhat.com> Sent: Monday, September 9, 2013 3:45:56 PM Subject: Re: AW: [Users] NFS troubleshooting page
On 09/09/2013 04:42 PM, Markus Stockhausen wrote:
ayal/federico - thoughts on how we can make things better? warn? etc?
Got my account and already modified the wiki.
Thanks for the help.
Markus
thanks markus. my question to ayal/federico is on how to fix the original issue to at least warn about the issue.
Good question. I don't have an answer yet, but I'll look into it. -- Federico
participants (4)
-
Dafna Ron -
Federico Simoncelli -
Itamar Heim -
Markus Stockhausen